Bug 394583

Summary: "Panel" UI freezes, still functional but display is no longer updating
Product: [Plasma] plasmashell Reporter: Ian Page Hands <iphands>
Component: PanelAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: normal CC: finex, kde
Priority: NOR    
Version: 5.12.5   
Target Milestone: 1.0   
Platform: RedHat Enterprise Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Ian Page Hands 2018-05-22 23:17:08 UTC
I use a single "Panel" that has the laucher, virtual desktop switcher, task manager, and notifications / clock.

Every once in a while (usually < 1hr of usage) I notice that the clock is stopped. Also the task manager portion shows old state... if I had xosview open (for example) when the "Panel" froze, then kill it later... I can still see the xosview in the task manager.

The state of the task manager *is* updated. I can change from app to app just fine, but I have to know where they are because what I see does not reflect the current state.

I can even hover and pause and discover what is actually on the panel. i.e. If I hover over what appears to be taskA (even though taskA is no longer preset) if taskB happens to be in that same spot, the flyout menu shows taskB.

Also alt+tab shows the correct tasks and task order, even when the panel UI/diplay is "frozen".
Comment 1 Ian Page Hands 2018-05-22 23:20:36 UTC
This seems an awful lot like the bug described here: https://bugzilla.redhat.com/show_bug.cgi?id=1193742

That bug talks about this happening with Intel graphics though. I am running NVIDIA hardware and drivers.

One other interesting thing is if I start and stop the compositor the transparency of the panel get enabled/disabled, but still the wrong information is shown (i.e. the clock is wrong, the state of the task manager is wrong etc).
Comment 2 FiNeX 2018-07-12 17:24:51 UTC
Hi, I'm experiencing the same bug daily. I'm using NVIDIA drivers and latest software version (on Archlinux). I did not found a pattern to reproduce the bug. Sometimes it starts while copying files or after opening/closing notifications.

Similar bugs:
https://bugs.kde.org/show_bug.cgi?id=380250
https://bugs.kde.org/show_bug.cgi?id=383660
https://bugs.kde.org/show_bug.cgi?id=386781
https://bugs.kde.org/show_bug.cgi?id=375781
https://bugs.kde.org/show_bug.cgi?id=358231
https://bugs.kde.org/show_bug.cgi?id=351897
https://bugs.kde.org/show_bug.cgi?id=382372

If you need more detailed info just ask :-)
Comment 3 David Edmundson 2018-07-12 17:38:11 UTC

*** This bug has been marked as a duplicate of bug 353983 ***
Comment 4 Ian Page Hands 2018-07-12 17:52:00 UTC
For what its worth... I have been running with the compositor disabled for a while now, and the issue is gone while in this mode.

I suspect the issue still exists, but I just keep the compositor disabled.