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Panels disappear after returning from lock screen on ubuntu #3793

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daschuer opened this Issue Dec 30, 2014 · 52 comments

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daschuer commented Dec 30, 2014

I am using Ubuntu Trusty and Cinnamon 2.4.5ubunt2.

After the Cinnamon Update from 2.2 I am facing the issue, that he panels are disappeared after returning from the lock screen.
I am able to start cinnamon-looking-glass, but I can find an error message or something else obvious.
It is also possible to "successful" resart cinnamon, but the panels are still not appearing.

In my system the gnome-screensaver and the cinnamon-creensaver is installed. I am not able to manually look the screen. I have also tried to have only one of them installed, but I have not managed to solve the issue.

I would like to provide more debug information, but I have no Idea how.

Any idea for a solution or workaround?

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ghost Jan 1, 2015

Try to disable the auto hide option of the panels, and disable also the animation startup on the settings and see if this help...

ghost commented Jan 1, 2015

Try to disable the auto hide option of the panels, and disable also the animation startup on the settings and see if this help...

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daschuer Jan 3, 2015

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Autohide is disabled. Changing the animation setting do not effect the issue.

I have noticed the following on a second machine, where a user menu is installed:
On this machine I am able to manually enable the screen lock, from the app menu, the cinnamon-screensaver is enabled. I can log in again and the panels are still there. From the user menu the gnome-screensaver is activated, I can log in, but the panels are gone.

What could be the reason that manual screen lock is working on this machine, but not on the other?

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daschuer commented Jan 3, 2015

Autohide is disabled. Changing the animation setting do not effect the issue.

I have noticed the following on a second machine, where a user menu is installed:
On this machine I am able to manually enable the screen lock, from the app menu, the cinnamon-screensaver is enabled. I can log in again and the panels are still there. From the user menu the gnome-screensaver is activated, I can log in, but the panels are gone.

What could be the reason that manual screen lock is working on this machine, but not on the other?

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ghost Jan 4, 2015

I really don't know what occurs. What i know is that this can not be occurs on the cinnamon session any more. See:
#2466

I can not reproduce the problem...

ghost commented Jan 4, 2015

I really don't know what occurs. What i know is that this can not be occurs on the cinnamon session any more. See:
#2466

I can not reproduce the problem...

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daschuer Jan 4, 2015

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.. at least it can occur on two of my systems ...

If I read it correct, #2466 is finally fixed in Cinnamon-session 2.4.2
I am using cinnamon-session 2.4.2ubuntu1 so I should have the blacklist entry.

ps -A | grep indicator-

has no output.

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daschuer commented Jan 4, 2015

.. at least it can occur on two of my systems ...

If I read it correct, #2466 is finally fixed in Cinnamon-session 2.4.2
I am using cinnamon-session 2.4.2ubuntu1 so I should have the blacklist entry.

ps -A | grep indicator-

has no output.

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tbl0605 Feb 13, 2015

Hi,
just to tell, that I exactly have the same problem (using Ubuntu Trusty and Cinnamon 2.4.5ubunt2) ! And sadly no clue what's the problem :(

tbl0605 commented Feb 13, 2015

Hi,
just to tell, that I exactly have the same problem (using Ubuntu Trusty and Cinnamon 2.4.5ubunt2) ! And sadly no clue what's the problem :(

@dalcde dalcde changed the title from Penals disappear after returning from lock screen on ubuntu to Panels disappear after returning from lock screen on ubuntu Feb 13, 2015

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aungthurhahein Mar 4, 2015

have the same exact problem with same environment. Ubuntu 14.04 LTS with cinnamon 2.4.6. At least wants a quick fix to deal with this issue. "cinnamon --replace" is not working and no idea how to deal with it.

aungthurhahein commented Mar 4, 2015

have the same exact problem with same environment. Ubuntu 14.04 LTS with cinnamon 2.4.6. At least wants a quick fix to deal with this issue. "cinnamon --replace" is not working and no idea how to deal with it.

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ghost Mar 4, 2015

The title was wrong so i don't understand what happend the first time...
@aungthurhahein and all can post the xsession-errors? home/USER/.xsession-errors

ghost commented Mar 4, 2015

The title was wrong so i don't understand what happend the first time...
@aungthurhahein and all can post the xsession-errors? home/USER/.xsession-errors

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mtwebster Mar 4, 2015

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Last I checked, gnome-screensaver had started ignoring our blacklisting of it - is having it installed a common factor for everyone? Is it running when this occurs? To be honest I don't recall if I figured out what was starting it - this could have been before we blacklisted all the indicator- apps ( and one of those might have been starting it) so this could have no bearing whatsoever.

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mtwebster commented Mar 4, 2015

Last I checked, gnome-screensaver had started ignoring our blacklisting of it - is having it installed a common factor for everyone? Is it running when this occurs? To be honest I don't recall if I figured out what was starting it - this could have been before we blacklisted all the indicator- apps ( and one of those might have been starting it) so this could have no bearing whatsoever.

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aungthurhahein Mar 4, 2015

I extracted some error message from .xsession-errors. Apart form these repeated error msg,the rest are font-config warning.

** (cinnamon-settings-daemon:2849): WARNING **: Failed to get session for pid: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '2849'

** (cinnamon-settings-daemon:2849): WARNING **: Failed to get session for pid: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '2849'

** (cinnamon-settings-daemon:2849): WARNING **: Failed to get session for pid: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '2849'

** (cinnamon-launcher:2920): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused

** (cinnamon:2933): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused
sudo: no tty present and no askpass program specified

** (nm-applet:2953): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused

** (polkit-gnome-authentication-agent-1:2951): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused

aungthurhahein commented Mar 4, 2015

I extracted some error message from .xsession-errors. Apart form these repeated error msg,the rest are font-config warning.

** (cinnamon-settings-daemon:2849): WARNING **: Failed to get session for pid: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '2849'

** (cinnamon-settings-daemon:2849): WARNING **: Failed to get session for pid: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '2849'

** (cinnamon-settings-daemon:2849): WARNING **: Failed to get session for pid: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '2849'

** (cinnamon-launcher:2920): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused

** (cinnamon:2933): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused
sudo: no tty present and no askpass program specified

** (nm-applet:2953): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused

** (polkit-gnome-authentication-agent-1:2951): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-jojZDCBWqv: Connection refused
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ghost Mar 4, 2015

@mtwebster but if @aungthurhahein has ubuntu 14.04 and use my repo he has this patch and is working ok... What is true is that ligthdm is broken for cinnamon session... i use mdm instead.... This is on the repo description and also in web8... thats is the Consolekit errors...

ghost commented Mar 4, 2015

@mtwebster but if @aungthurhahein has ubuntu 14.04 and use my repo he has this patch and is working ok... What is true is that ligthdm is broken for cinnamon session... i use mdm instead.... This is on the repo description and also in web8... thats is the Consolekit errors...

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ghost Mar 4, 2015

I will recommend switch to mdm, but is possible that this can not resolve the problem... Just at less, the usb device can be mounted automatically when they are connected, and with lucky also this problem will be the cause. I have not another idea.

ghost commented Mar 4, 2015

I will recommend switch to mdm, but is possible that this can not resolve the problem... Just at less, the usb device can be mounted automatically when they are connected, and with lucky also this problem will be the cause. I have not another idea.

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aungthurhahein Mar 5, 2015

another input is that my work machine have same environment setup(ubuntu 14.04 with cinnamon 2.4.6) but there is no such problem like that. I think the problem is not occured at every Ubuntu distros, which replaced DE with cinnamon.

aungthurhahein commented Mar 5, 2015

another input is that my work machine have same environment setup(ubuntu 14.04 with cinnamon 2.4.6) but there is no such problem like that. I think the problem is not occured at every Ubuntu distros, which replaced DE with cinnamon.

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ghost Mar 5, 2015

@aungthurhahein you are sure that you take the correct xsession error? what is need is to see the error after return for the screen saver (and the problem occurs), if you take the xsession without the problem no one can see anything...

ghost commented Mar 5, 2015

@aungthurhahein you are sure that you take the correct xsession error? what is need is to see the error after return for the screen saver (and the problem occurs), if you take the xsession without the problem no one can see anything...

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aungthurhahein Mar 6, 2015

@lestcape yes.I looked at error file after I login from screen saver. I will send the whole file to your email.

aungthurhahein commented Mar 6, 2015

@lestcape yes.I looked at error file after I login from screen saver. I will send the whole file to your email.

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davidchua Mar 8, 2015

I'm on Ubuntu 14.04 (Ubuntu GNOME) and also on @lestcape's repo.

I'm also getting the same issue after recovering from screensaver lockout.

My bottom panels are gone and the only way for me to fix this is to do a full on restart.

Would appreciate if there was a way to reload the panels without having to be forced to restart.

davidchua commented Mar 8, 2015

I'm on Ubuntu 14.04 (Ubuntu GNOME) and also on @lestcape's repo.

I'm also getting the same issue after recovering from screensaver lockout.

My bottom panels are gone and the only way for me to fix this is to do a full on restart.

Would appreciate if there was a way to reload the panels without having to be forced to restart.

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leigh123linux Mar 8, 2015

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@lestcape

I wouldn't say lightdm is broken with cinnamon-session, it's been working fine here for years.

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leigh123linux commented Mar 8, 2015

@lestcape

I wouldn't say lightdm is broken with cinnamon-session, it's been working fine here for years.

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ghost Mar 8, 2015

@leigh123linux after 2.0 cinnamon has its own name, when this occurs i suppose that also cause some incompatibilities with lightdm. The problem is that, this only occurs using upstart (ubuntu 14.04, not fedora)... Thats will not be resolved on lightdm, because upstart is deprecated. You use consolekit on fedora for something?

linuxmint/cinnamon-settings-daemon#70

ghost commented Mar 8, 2015

@leigh123linux after 2.0 cinnamon has its own name, when this occurs i suppose that also cause some incompatibilities with lightdm. The problem is that, this only occurs using upstart (ubuntu 14.04, not fedora)... Thats will not be resolved on lightdm, because upstart is deprecated. You use consolekit on fedora for something?

linuxmint/cinnamon-settings-daemon#70

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ghost Mar 8, 2015

I really can not be sure if fix the lightdm problem, could also solve this problem, but if the session, not start properly i will expect that could happen several things, this could be one of them. I don't have this problem, but if some one with the problem want to test the swap to mdm and see what happen would be good.

ghost commented Mar 8, 2015

I really can not be sure if fix the lightdm problem, could also solve this problem, but if the session, not start properly i will expect that could happen several things, this could be one of them. I don't have this problem, but if some one with the problem want to test the swap to mdm and see what happen would be good.

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Fedora uses systemd only since F17

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leigh123linux commented Mar 8, 2015

@lestcape

Fedora uses systemd only since F17

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ghost Mar 8, 2015

@leigh123linux but i detected the problem after the change of the cinnamon session name, thats is relative new, Anyway i try to avoid this point, but if a problem exist and how mint have a dm, the cinnamon devs need to have an idea of what ocurs. I think if an explicit patch to cinnamon is needed on mdm this will not be ported to lightdm if cinnamon devs not reported this...

You can see that the problem exist and not also to me and for @aungthurhahein here:
http://forums.linuxmint.com/viewtopic.php?f=190&t=158774

You also can see that mdm have explicit call to cinnamon features (this not occurs on lightdm, ofcourse and could be relate to this issue):
linuxmint/mdm@30cd39d

Anyway here there are a problem, do you have an idea to fix it?

ghost commented Mar 8, 2015

@leigh123linux but i detected the problem after the change of the cinnamon session name, thats is relative new, Anyway i try to avoid this point, but if a problem exist and how mint have a dm, the cinnamon devs need to have an idea of what ocurs. I think if an explicit patch to cinnamon is needed on mdm this will not be ported to lightdm if cinnamon devs not reported this...

You can see that the problem exist and not also to me and for @aungthurhahein here:
http://forums.linuxmint.com/viewtopic.php?f=190&t=158774

You also can see that mdm have explicit call to cinnamon features (this not occurs on lightdm, ofcourse and could be relate to this issue):
linuxmint/mdm@30cd39d

Anyway here there are a problem, do you have an idea to fix it?

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davidchua Apr 4, 2015

I'm not sure how relevant is this but I've switched from LDM to MDM 1.6.0 on my Ubuntu 14.04 (Cinnamon 2.4.6) and the panels still disappear after coming out of lock screen.

davidchua commented Apr 4, 2015

I'm not sure how relevant is this but I've switched from LDM to MDM 1.6.0 on my Ubuntu 14.04 (Cinnamon 2.4.6) and the panels still disappear after coming out of lock screen.

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ghost Apr 4, 2015

@davidchua i think is relevant...

ghost commented Apr 4, 2015

@davidchua i think is relevant...

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tbl0605 Apr 4, 2015

After reading what davidchua posted about the screensaver lockout issue (1 month ago), I did following:
sudo chmod a-x /usr/bin/gnome-screensaver

to avoid that the gnome screensaver get launched on top of the cinnamon screensaver.
It's hacky but in my case it works, panels don't disappear anymore.
Only (big) drawback, is that (in very rare case) I don't have any screensaver showing after screen wake-up!
So that's just a bad workaround for now...

tbl0605 commented Apr 4, 2015

After reading what davidchua posted about the screensaver lockout issue (1 month ago), I did following:
sudo chmod a-x /usr/bin/gnome-screensaver

to avoid that the gnome screensaver get launched on top of the cinnamon screensaver.
It's hacky but in my case it works, panels don't disappear anymore.
Only (big) drawback, is that (in very rare case) I don't have any screensaver showing after screen wake-up!
So that's just a bad workaround for now...

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ghost Apr 4, 2015

@tbl0605 this mean that you have the gnome-screensaver process working somehow before remove the execution permission? The only way will be that other application is starting the process, the cinnamon session can not do that.

ghost commented Apr 4, 2015

@tbl0605 this mean that you have the gnome-screensaver process working somehow before remove the execution permission? The only way will be that other application is starting the process, the cinnamon session can not do that.

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tbl0605 Apr 4, 2015

@lestcape : yes you're probably right. But as it was pretty random, I never found what launched the gnome-screensaver process! It really seems that it was launched each time exactly at same time than the gnome-screensaver process :S Sorry if I cannot help much more...

tbl0605 commented Apr 4, 2015

@lestcape : yes you're probably right. But as it was pretty random, I never found what launched the gnome-screensaver process! It really seems that it was launched each time exactly at same time than the gnome-screensaver process :S Sorry if I cannot help much more...

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tbl0605 Apr 4, 2015

@lestcape : thank you! So in my case it's a different bug, but with same symptoms as this bug... Is there something to do ? :S

tbl0605 commented Apr 4, 2015

@lestcape : thank you! So in my case it's a different bug, but with same symptoms as this bug... Is there something to do ? :S

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ghost Apr 4, 2015

@tbl0605 Is not a thing that we can do, cinnamon devs also speak of return of use to gnome-screensaver. I think that there are a lot of work to do if they try to avoid all possible conflicts and also there are a lot of work if they decide be compatible with gnome-screensaver instead of cinnamon-screensaver, because of the compatibilities with cinnamon, that i think is the principal reason of the usage of the fork... Thats is a decision that they need to take. Another could be not do anything, because at last this only occurs when you have gnome-screensaver installed and you can uninstall it if what you want is use cinnamon only, but this is my opinion.

ghost commented Apr 4, 2015

@tbl0605 Is not a thing that we can do, cinnamon devs also speak of return of use to gnome-screensaver. I think that there are a lot of work to do if they try to avoid all possible conflicts and also there are a lot of work if they decide be compatible with gnome-screensaver instead of cinnamon-screensaver, because of the compatibilities with cinnamon, that i think is the principal reason of the usage of the fork... Thats is a decision that they need to take. Another could be not do anything, because at last this only occurs when you have gnome-screensaver installed and you can uninstall it if what you want is use cinnamon only, but this is my opinion.

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dalcde Apr 4, 2015

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Unfortunately gnome screensaver no longer exists: https://git.gnome.org/browse/gnome-screensaver/log/

It was ditched after GNOME 3.6 and only a few updates (16 commits since Oct 2012, to be precise) has been provided since then, mostly tiny fixes and translation updates

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dalcde commented Apr 4, 2015

Unfortunately gnome screensaver no longer exists: https://git.gnome.org/browse/gnome-screensaver/log/

It was ditched after GNOME 3.6 and only a few updates (16 commits since Oct 2012, to be precise) has been provided since then, mostly tiny fixes and translation updates

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ghost Apr 5, 2015

@dalcde thats is really worse... Thanks for the reference and the explanation... then, personally to me the return is not a good option.

ghost commented Apr 5, 2015

@dalcde thats is really worse... Thanks for the reference and the explanation... then, personally to me the return is not a good option.

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ghost Apr 5, 2015

@tbl0605 rename the gnome-screensaver and create a symbolic link to the cinnamon-screensaver, this need to be a better patch than remove the execution permission. Of Course this is not a solution, and can create another types of problems on other sessions. You need to test what happens on your specific case... the inverse procedure could also work, but i think is worse for cinnamon session, of course.

ghost commented Apr 5, 2015

@tbl0605 rename the gnome-screensaver and create a symbolic link to the cinnamon-screensaver, this need to be a better patch than remove the execution permission. Of Course this is not a solution, and can create another types of problems on other sessions. You need to test what happens on your specific case... the inverse procedure could also work, but i think is worse for cinnamon session, of course.

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leigh123linux Apr 5, 2015

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Most distro's removed gnome-screensaver from the repo's because it's of no use to gnome-shell, ubuntu should have renamed it to unity-screensaver IMO (how does ubuntu stop gnome-screensaver running in gnome-shell?)!
Does debian packaging allow for obsoletes and provides, if so it could be used to purge it?

https://fedoraproject.org/wiki/Packaging:Guidelines#Renaming.2FReplacing_Existing_Packages

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leigh123linux commented Apr 5, 2015

Most distro's removed gnome-screensaver from the repo's because it's of no use to gnome-shell, ubuntu should have renamed it to unity-screensaver IMO (how does ubuntu stop gnome-screensaver running in gnome-shell?)!
Does debian packaging allow for obsoletes and provides, if so it could be used to purge it?

https://fedoraproject.org/wiki/Packaging:Guidelines#Renaming.2FReplacing_Existing_Packages

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tbl0605 Apr 5, 2015

@lestcape ok I renamed gnome-screensaver and created a link to cinnamon-screensaver, that's a better workaround than mine. Hopefully with no drawbacks ;)

tbl0605 commented Apr 5, 2015

@lestcape ok I renamed gnome-screensaver and created a link to cinnamon-screensaver, that's a better workaround than mine. Hopefully with no drawbacks ;)

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ghost Apr 5, 2015

@leigh123linux when ubuntu will do what to not affecting others linux projects? They only do some things if the decision come from debian and after 100000 absurd discussions because they want carry on using what debian provide. So, i think that is debian who need create an standar to this miss (maybe delegate to the session to set the corresponding screensaver on some environment variable). After what you say and if i'm a cinnamon dev i will not do anything i will wait for an standar in all case. Is a shame that users are always the weakest point in the chain.

ghost commented Apr 5, 2015

@leigh123linux when ubuntu will do what to not affecting others linux projects? They only do some things if the decision come from debian and after 100000 absurd discussions because they want carry on using what debian provide. So, i think that is debian who need create an standar to this miss (maybe delegate to the session to set the corresponding screensaver on some environment variable). After what you say and if i'm a cinnamon dev i will not do anything i will wait for an standar in all case. Is a shame that users are always the weakest point in the chain.

@dalcde dalcde added the BUG label May 4, 2015

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DaFri-Nochiterov Mar 12, 2016

Still not fixed? 😐

Ubuntu 15.10
Cinnamon 2.6.13

DaFri-Nochiterov commented Mar 12, 2016

Still not fixed? 😐

Ubuntu 15.10
Cinnamon 2.6.13

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@DaFri-Nochiterov

It's not cinnamon that is broken so go and bitch at gnome-screensaver at launchpad bugzilla instead!

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leigh123linux commented Mar 12, 2016

@DaFri-Nochiterov

It's not cinnamon that is broken so go and bitch at gnome-screensaver at launchpad bugzilla instead!

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Actually should be fixed in cinnamon 2.8.7

5c5d191

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mtwebster commented Mar 12, 2016

Actually should be fixed in cinnamon 2.8.7

5c5d191

@mtwebster mtwebster closed this Mar 12, 2016

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Removing gnome-screensaver will also fix, as before

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mtwebster commented Mar 12, 2016

Removing gnome-screensaver will also fix, as before

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DaFri-Nochiterov Mar 13, 2016

OK. I removed it and all fixed.

Thanks you 😊

DaFri-Nochiterov commented Mar 13, 2016

OK. I removed it and all fixed.

Thanks you 😊

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vladimir-didenko Mar 21, 2016

Actually should be fixed in cinnamon 2.8.7

Actually it is first version when I see reported problem on my system. At least with Gnome 3.19 libs (not able to reproduce with 3.18). Should I create separate story?

vladimir-didenko commented Mar 21, 2016

Actually should be fixed in cinnamon 2.8.7

Actually it is first version when I see reported problem on my system. At least with Gnome 3.19 libs (not able to reproduce with 3.18). Should I create separate story?

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vladimir-didenko Mar 21, 2016

@leigh123linux

It's not cinnamon that is broken so go and bitch at gnome-screensaver at launchpad bugzilla instead!

I have no gnome-screensaver installed but see issue with 2.8.7

vladimir-didenko commented Mar 21, 2016

@leigh123linux

It's not cinnamon that is broken so go and bitch at gnome-screensaver at launchpad bugzilla instead!

I have no gnome-screensaver installed but see issue with 2.8.7

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vladimir-didenko Mar 23, 2016

Actually it is first version when I see reported problem on my system. At least with Gnome 3.19 libs

Can't reproduce with Gnome 3.20. Hope it was Gnome bug.

vladimir-didenko commented Mar 23, 2016

Actually it is first version when I see reported problem on my system. At least with Gnome 3.19 libs

Can't reproduce with Gnome 3.20. Hope it was Gnome bug.

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pashdown Apr 27, 2016

Removing gnome-screensaver fixes the problem, but for some reason the "Screen locker" applet no longer functions after doing so. Weirdly enough, the "Lock screen" function under the Menu works just fine.

pashdown commented Apr 27, 2016

Removing gnome-screensaver fixes the problem, but for some reason the "Screen locker" applet no longer functions after doing so. Weirdly enough, the "Lock screen" function under the Menu works just fine.

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vranki Jul 21, 2016

Looks like this issue is back - got 2 lock screens, and after those the panel is gone.
Cinnamon 2.8.6 on Ubuntu 16.04.

I removed gnome-screensaver now, but it's just a workaround. This should be handled somehow in cinnamon, regular users can't be expected to do that.

vranki commented Jul 21, 2016

Looks like this issue is back - got 2 lock screens, and after those the panel is gone.
Cinnamon 2.8.6 on Ubuntu 16.04.

I removed gnome-screensaver now, but it's just a workaround. This should be handled somehow in cinnamon, regular users can't be expected to do that.

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mtwebster Jul 21, 2016

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Update to 2.8.8 or 3.0.x

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mtwebster commented Jul 21, 2016

Update to 2.8.8 or 3.0.x

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ryanrca Nov 7, 2016

I'm reproducing this with Kbuntu 16.04.

To get the panel back, I have to do this:

cd ~/.config
mv plasma-org.kde.plasma.desktop-appletsrc plasma-org.kde.plasma.desktop-appletsrc.bak
kbuildsycoca5 && kquitapp plasmashell && kstart plasmashell

Which sucks because my destop setting reset.

I am not running any screensaver, just screen locking.

ryanrca commented Nov 7, 2016

I'm reproducing this with Kbuntu 16.04.

To get the panel back, I have to do this:

cd ~/.config
mv plasma-org.kde.plasma.desktop-appletsrc plasma-org.kde.plasma.desktop-appletsrc.bak
kbuildsycoca5 && kquitapp plasmashell && kstart plasmashell

Which sucks because my destop setting reset.

I am not running any screensaver, just screen locking.

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JosephMcc Nov 7, 2016

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From reports in the past KDE and Cinnamon do not play well together.

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JosephMcc commented Nov 7, 2016

From reports in the past KDE and Cinnamon do not play well together.

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imbezol Sep 18, 2017

I've found just a "kstart plasmashell" is sufficient to get the desktop, icons, and panel back.

imbezol commented Sep 18, 2017

I've found just a "kstart plasmashell" is sufficient to get the desktop, icons, and panel back.

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stolk Nov 26, 2017

I am on 16.04.3 LTS and this happens to me.
cinnamon version is 2.8.6-1ubuntu1

cinnamon --restart does not help.

F2 - r does not help either.

But as root: /etc/init.d/lightdm restart does, but that does mean losing your apps.

Note: I don't have auto-hide enabled. But I did increase the height of the panel.

Note: Not fully reproducible. Sometimes it happens, sometimes it does not.

stolk commented Nov 26, 2017

I am on 16.04.3 LTS and this happens to me.
cinnamon version is 2.8.6-1ubuntu1

cinnamon --restart does not help.

F2 - r does not help either.

But as root: /etc/init.d/lightdm restart does, but that does mean losing your apps.

Note: I don't have auto-hide enabled. But I did increase the height of the panel.

Note: Not fully reproducible. Sometimes it happens, sometimes it does not.

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ontherunvaro Mar 13, 2018

For me it was an issue of duplicity between cinnamon-screensaver and gnome-screensaver. Just uninstalling gnome-screensaver with apt was enough to work around the issue.

This was an Ubuntu 16.04 installation, with Cinnamon 2.8.7.

ontherunvaro commented Mar 13, 2018

For me it was an issue of duplicity between cinnamon-screensaver and gnome-screensaver. Just uninstalling gnome-screensaver with apt was enough to work around the issue.

This was an Ubuntu 16.04 installation, with Cinnamon 2.8.7.

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wu-lee Mar 16, 2018

I've also been seeing this. Panel disappears after waking laptop from sleep, and an odd second screen-lock with a triangle mozaic pattern is there instead of my usual. I have gnome-screensaver installed, I infer it's that. I've uninstalled, let's see if that banishes the problem. (I am a refugee from KDE, if that helps, in that KDE is still installed alongside Cinnamon.)

I'm running Ubuntu 16.04 LTS.

[12 days later: the problem hasn't reoccurred so far]

wu-lee commented Mar 16, 2018

I've also been seeing this. Panel disappears after waking laptop from sleep, and an odd second screen-lock with a triangle mozaic pattern is there instead of my usual. I have gnome-screensaver installed, I infer it's that. I've uninstalled, let's see if that banishes the problem. (I am a refugee from KDE, if that helps, in that KDE is still installed alongside Cinnamon.)

I'm running Ubuntu 16.04 LTS.

[12 days later: the problem hasn't reoccurred so far]

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prinsherbert Mar 28, 2018

To upgrade cinnamon to a version higher than 2.8.6, add the cinnamon ppa and upgrade:

sudo add-apt-repository ppa:embrosyn/cinnamon
sudo apt-get update
sudo apt-get upgrade

When I'm writing this, ubuntu 16.04 only offers up to version 2.8.6, which according to aforementioned comments has the panel-bug, but the ppa has newer versions.

prinsherbert commented Mar 28, 2018

To upgrade cinnamon to a version higher than 2.8.6, add the cinnamon ppa and upgrade:

sudo add-apt-repository ppa:embrosyn/cinnamon
sudo apt-get update
sudo apt-get upgrade

When I'm writing this, ubuntu 16.04 only offers up to version 2.8.6, which according to aforementioned comments has the panel-bug, but the ppa has newer versions.

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