Bug 452871 - primary monitor of a dual monitor (HDMI) setup loses background when coming out of sleep
Summary: primary monitor of a dual monitor (HDMI) setup loses background when coming o...
Status: RESOLVED DUPLICATE of bug 353975
Alias: None
Product: plasmashell
Classification: Plasma
Component: generic-multiscreen (show other bugs)
Version: 5.24.4
Platform: Arch Linux Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
Depends on:
Reported: 2022-04-22 16:15 UTC by Henrik Hudson
Modified: 2022-04-22 19:15 UTC (History)
3 users (show)

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Description Henrik Hudson 2022-04-22 16:15:05 UTC
I have 2 systems, both are AMD GPU based and both are running Arch and are plugged into the same 2 monitors. However, one is using the HDMI ports and the other the DP ports. The issue is only happening on the DP ports system.

When the monitors are coming out of sleep / wake up (CPU is not set to sleep or hibernate) the primary desktop will have lost the background, right click menu no longer works, etc... However, the background it had usually has has moved to the other monitor. Sometimes the other monitor just has one of the Arch package (or KDE) default backgrounds vs. one of the ones I've set. The taskbar and virtual deskops, konsole apps, etc...all stay were they are and you can still work in everything. There just isn't a "desktop" anymore on the primary monitor.

Killing the plasmashell process and re-starting it brings back both backgrounds, right click menu, etc.... However, the background that had moved to the 2nd monitor goes back to the first and the original background on the 2nd monitor shows up again.

This feels like someone is counting starting with 0 and someone else with 1 in an array or something when coming out of sleep or while it's asleep processes are doing something, but are off by 1.

Operating System: Arch Linux
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.3
Kernel Version: 5.17.3-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 12 × Intel® Core™ i7-8700 CPU @ 3.20GHz
Memory: 31.2 GiB of RAM
Graphics Processor: AMD Radeon RX 550 / 550 Series

similar to: https://bugs.kde.org/show_bug.cgi?id=362058   , but I've only started seeing this issue in the last 6 months or so. Same hardware and setup, although I'm on a clean install of Arch now vs. an Arch install that had been around for awhile.
Comment 1 Henrik Hudson 2022-04-22 16:18:57 UTC
I need to amend this. I hadn't finished my coffee. It's the system plugged into the HDMI ports that lose their background, etc.... The DP port system is actually fine.
Comment 2 Henrik Hudson 2022-04-22 16:29:12 UTC
I can attach gdb to the plasmashell process, but it's not "crashing" per se so don't know how helpful it will be.
Comment 3 Nate Graham 2022-04-22 19:15:50 UTC

*** This bug has been marked as a duplicate of bug 353975 ***