Widgets on vertical panel don't stick to their position after restarting the panel

[o-alquimista]

During my sessions, all widgets are locked to a position, and they remain properly positioned during the current session. However, restarting the panel (or rebooting the system) will cause it to forget the position of my widgets, only when a vertical panel is used. The screenshots show how it looks before and after.

Additional info

• I have never tried this with an older version.
• I did not succeed in getting the stack trace for mate-panel. GDB says "No stack" when running "gdb mate-panel" followed by "backtrace".

MATE general version

1.20.0

Package version

community/mate-panel 1.20.0-1 (mate)

Linux Distribution

Arch Linux

Link to downstream report of your Distribution

https://bugs.archlinux.org/task/57631?project=5&opened=27326

[info-cppsp]

doesn't seem to be a problem with 1.18.6
I have noticed app launcher moving when I enable / disable the hide buttons on left panel with 1.20.
now app launchers move when enable / disable the hide buttons, but after mate-panel --replace they are where they are supposed to be.

I would say try using mate-panel --replace and add launchers one after another to a new panel.
maybe one launcher causes this, not the panel

[o-alquimista]

I experimented with mate-panel --replace and was able to reproduce the problem only when any of the widgets were placed to the very extremity of the panel. If I position all widgets so they don't touch the ends of the panel, after running --replace they remain in their positions.

[info-cppsp]

on ub 18.04 I can see that at the bottom of the left panel (near the bottom left corner of the screen)
the position looked up in dconf-editor changed from panel-right-stick off and a position around 900 (I have a fullhd monitor) to panel-right-stick on and position 37. on the panel object I have placed on the panel.

for me this means that for vertical panels the calculation of the panel widget is not fully correct...
not a problem with 1.18.6
tested with left panel size 40

[info-cppsp]

ok, so if you drag and drop a launcher, it won't get panel-right-stick on and it will stay at the end as it should.

[moqmar]

I still have the same problem - panel-right-stick is on for the widgets that should be at the bottom, but they are just below the last widget without panel-right-stick. Seems like the height of the panel is not fully taken into account here.

[uqs]

This is a recent regression. It used to work just fine that a "left" or "right" panel would honor the panel-right-stick and put the icons on the far side of the panel (the bottom, in that case).

This worked fine for me till 1 or 2 weeks ago. I'm now on 1.20.1-3 and I think I was at 1.18 before. So while a "top" or "bottom" panel honors the right-stick just fine, the "left" and "right" panels no longer do that in 1.20.1

Why even use right-stick you might ask? Well, I can't use an absolute pixel value like 1000 or something, because a) I use the profile on different machines with different screen resolutions and b) on my laptop I use external displays (with different resolutions) every once in a while.

To everyone that has the problem: switch your panel to "top", does it look right? If so please report back (and switch back to "left" or "right").

Edit: relevant sections from dconf-dump

[org/mate/panel/general]
object-id-list=['menu-bar', 'notification-area', 'clock', 'object-1', 'object-2', 'object-0']
toplevel-id-list=['top']

[org/mate/panel/toplevels/top]
expand=true
orientation='left'
x-right=-1
screen=0
x=0
size=32

[org/mate/panel/objects/clock]
applet-iid='ClockAppletFactory::ClockApplet'
locked=true
toplevel-id='top'
position=0
object-type='applet'
panel-right-stick=true

the clock will be at the right when I switch the panel to "top", but it doesn't stick to the bottom when I switch it to "left". Again, this worked fine in every version up to and include 1.18.

[monsta]

Ok, #1004 should fix it...

[monsta]

Done. Fix is also picked to 1.22 and 1.20 branches.