Ubuntu 20.04 Screen lock bug

[Ralphhorn]

OS: Ubuntu 20.04
Regolith Unstable

After installing regolith I experienced some problems related to locking my screen.
If I lock my screen I do get a password prompt asking me for a password. However once I login the UI does not seem to load. However, I am able to reboot or shutdown my desktop with the standard regolith keybinds.

Any help would be appriciated, I am somewhat new to I3/regolith.

[FischerMoseley]

Can confirm, I'm having the same issue on a fresh install of 20.04 running on an XPS 15 9570.

[kgilmer]

@Ralphhorn can you check if the package gnome-screensaver is installed? The version of gnome-flashback (the variant of Gnome used by Regolith) has integrated the lock screen into itself as of the 20.04 version, and so there may be some kind of race or conflict. Another common issue w/ screen refresh issues is due to a problem with video hardware and the compositor. You can test if this is the problem by installing the package regolith-compositor-none and then logging back in.

That @FischerMoseley is having the same issue on a fresh install is concerning.

Is it true that when in the bad state, the computer is running fine, but the UI does not update at all? what if you switch to a TTY? F6, for example...does it do anything?

[kgilmer]

Also, @Ralphhorn I suggest you switch to the release or stable PPA now that the 1.4 release is official. Unstable is...well, not always a great place to be. To switch your PPA:

$ sudo add-apt-repository --remove ppa:regolith-linux/unstable
$ sudo add-apt-repository ppa:regolith-linux/release

[ssauperl]

I have the same problem on the regolith release, ubuntu 20.04. Think it has something to do with multiple monitors: #317
Looks like the same problem.

[Ralphhorn]

@kgilmer gnome-screensaver is installed. I will remove it tonight and check if this does solve the problem. I will also switch to the stable branch.

Would you recommend testing the TTY before removing gnome-screensaver?

@ssauperl My setup uses one ultrawide monitor so it seems that this issue might not be exclusive to multi-monitor setups

[kgilmer]

Would you recommend testing the TTY before removing gnome-screensaver?

If possible, yes. If not NBD.

[xfalcox]

Installing regolith-compositor-none don't solve the issue.

[tobybatch]

On a dual screen setup only one screen unlocks, the other is still locked.

I can fix it by killall gnome-flashback && gnome-flashback & if that's any help.

[xfalcox]

Super+Shift+R also helps.

[muktupavels]

There was some problems with screensaver in gnome-flashback. Please try/test 3.36.3 release that has few fixes for it. If new release does not fix problems, then get debug output for screensaver - G_MESSAGES_DEBUG=screensaver gnome-flashback.

[kgilmer]

Thanks @muktupavels , where can we get that version of gnome-flashback? I searched launchpad.net but didn't find it.

[muktupavels]

https://gitlab.gnome.org/GNOME/gnome-flashback/-/tags

It is not available in Ubuntu yet. I also need to create SRU bug first...

[Ralphhorn]

Would you recommend testing the TTY before removing gnome-screensaver?

If possible, yes. If not NBD.

Some stuff came up and I could not test it at the planned time.
It seems that I can lock my screen and log back in if I immediately enter the password. However, Once I leave it locked for a while I can not see my UI.

However, If I remove the gnome-screensaver I cannot lock the session.
What would be used for the session lock?

These are my current session lock configs.
`## Session // Lock Screen // <> Escape ##
set_from_resource $i3-wm.program.lock i3-wm.program.lock gnome-screensaver-command --lock

bindsym $mod+Escape exec $i3-wm.program.lock
`

[kgilmer]

@Ralphhorn looks like you're using an old version of the Regolith i3 config file. This is what the keybinding should execute in R1.4. I suggestion you reset your install back to defaults and then reintegrate any desired changes once you get the default working.

https://regolith-linux.org/docs/getting-started/install/#upgrading-with-customizations

[Ralphhorn]

Works like a charm!

[muktupavels]

https://bugs.launchpad.net/ubuntu/+source/gnome-flashback/+bug/1876731

[felisucoibi]

same here, lot of computers, gnome-flashback installed, screen saver lock never comes back

[prouddad1]

Related problem: Upgraded from 18.04 to 19.10 in March after a processor upgrade. Screen lock stopped working at all. Switch was there in the settings, but didn't activate screen lock. Super + L did nothing. CNTRL + ALT + L did nothing. Upgraded to 20.04 a couple of days before the official release, hoping that would resolve the issue. Still same problem. Only way to lock the screen is to do a shutdown. Not really a solution but NVMe makes it bearable.
Update: I ran: gnome-screensaver-command -l
Now Super + L works

[sbakic]

Hi @kgilmer I am confused now.

Since I installed Ubuntu 20.04 as an upgrade of 19.10 (everything worked fine with 19.10, even 19.04 and 18.10 - this was upgrade path through the years), with all default settings related to UI environment and so on, I couldn't lock the screen. What I mean by that is basically clicking on the lock screen at the bottom right corner or lock screen shortcut give the same output, which is freezing the whole window for 2-3 seconds and then returning back to normal window, without locking it. Nothing happens when I set timer to lock the screen as well.

At first, I thought it is some bug and that they will resolve it at some point.

I am not familiar with any package that locks the screen in Ubuntu. So I don't know where to start to investigate this issue.

What I have run:

dm-tool lock
Command 'dm-tool' not found, but can be installed with:
sudo apt install lightdm

gnome-screensaver-command -l
Command 'gnome-screensaver-command' not found, but can be installed with:
sudo apt install gnome-screensaver

dpkg -l | gnome-flashback
Command 'gnome-flashback' not found, but can be installed with:
sudo apt install gnome-flashback

sudo dpkg-reconfigure gdm3
no output

ps -ef | grep 'screensaver'
sbakic 2513 2098 0 10:35 ? 00:00:00 /usr/libexec/gsd-screensaver-proxy
sbakic 5965 3955 0 10:41 pts/0 00:00:00 grep --color=auto screensaver

As I understood I don't have lightdm or gnome-screensaver which is used to lock the screen. I didn't read much about gnome-flashback, I didn't understand what it is.

What should I install and do I need to configure something?

Thanks

PLEASE IGNORE ABOVE..

Problem was that I installed Gnome extension called "Desktop Icons" and when I turned that off I could lock screen.

[kgilmer]

Hi @Ralphhorn , it appears that Regolith was uninstalled as part of your Ubuntu upgrade. This is expected, see here about steps to add Regolith back into your system.

If this does not solve your problem, kindly open a new issue so we can take a look.

[prouddad1]

In my case, gnome desktop replaced unity. I had to run the gnome command for screenlock in terminal the first time, then it worked as expected (settings and hot keys worked). This also worked to launch terminal with hot keys. I had to manually run the commands in terminal before they would work with hot keys.

…

On Thu, Jun 11, 2020 at 8:13 AM Ken Gilmer ***@***.***> wrote: Hi @Ralphhorn <https://github.com/Ralphhorn> , it appears that Regolith was uninstalled as part of your Ubuntu upgrade. This is expected, see here <https://regolith-linux.org/docs/getting-started/install/#upgrading-ubuntu> about steps to add Regolith back into your system. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#356 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APBMHFDDOVE7OKOIXDFRYSDRWDYBJANCNFSM4MTCAABQ> .

[prouddad1]

@Stefan The settings or hot key didn't have any effect when first upgrade to 19 in FEB2020. Revisit the issue after upgrade to 20.04 MAY2020 I encountered the same problem. I opened a terminal and used the terminal command for lock screen (gnome) and lock screen worked. Hot key command started working after this as well. **Seems like the command has to be executed from terminal once and the problem was resolved.** I had the same experience getting terminal to launch from hot key. After issuing the command in terminal once, the hot keys to launch terminal worked.

…

On Thu, Jun 11, 2020 at 10:07 AM Stefan Bakic ***@***.***> wrote: As I understood this command lock the screen but it doesn't work. How can I debug it? dbus-send --type=method_call --dest=org.gnome.ScreenSaver /org/gnome/ScreenSaver org.gnome.ScreenSaver.Lock — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#356 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APBMHFH3QUFUQNRS6WMJMQTRWEFLZANCNFSM4MTCAABQ> .

[Ralphhorn]

Hi @Ralphhorn , it appears that Regolith was uninstalled as part of your Ubuntu upgrade. This is expected, see here about steps to add Regolith back into your system.

If this does not solve your problem, kindly open a new issue so we can take a look.

Hey @kgilmer, I have not been following this thread for a while due to trying out an arch based distro for the first time. Could it be that you meant to tag the previous poster?