https://bugs.kde.org/show_bug.cgi?id=497436
Bug ID: 497436
Summary: Primary monitor desktop environment breaks after
monitor sleep or shutoff (or randomly), black screen
and panels move to secondary monitor
Classification: Plasma
Product: plasmashell
Version: 6.2.4
Platform: Arch Linux
OS: Other
Status: REPORTED
Severity: major
Priority: NOR
Component: Desktop Containment
Assignee: plasma-b...@kde.org
Reporter: maxsloa...@gmail.com
CC: notm...@gmail.com
Target Milestone: 1.0
SUMMARY
Please excuse any mistakes or flaws, this is my first bug submission.
I have been having issues keeping my primary monitor working correctly. There
seem to be a few situations in which it has consistently happened:
1. When performing some action on my primary monitor, typically opening an app
like Dolphin. Oddly enough it happened a couple times when trying to browse the
files for a Timeshift image by right-clicking and selecting that option.
2. When any type of auto-sleep or suspend occurs. I have since disabled these
options for this reason.
3. When the monitor is manually shut off with its power button.
There has also been some variation in exactly what happens when I have this
issue. I have since disabled any type of auto-sleep or suspend because this
issue irritated me so much, but when I was having problems with this monitor
previously due to suspend and autosleep, rather than the desktop environment
simply breaking, my monitor and system would stop communicating at all, and my
monitor would display "no signal" and enter power saving mode.
Now, when I have issues with the primary monitor, it continues to communicate
with the system in that it still exchanges a signal, but the desktop
environment breaks and my panels move to my secondary monitor, my desktop
background goes black, but my cursor and any windows remain on my primary
monitor. When this occurs, making some change to the display configuration
(i.e. changing refresh rate, etc.) seems to kick things back into gear and my
desktop will right itself, and my panels will move back over and my wallpaper
will come back. So, I have the capability of fixing the issue when it arises,
but it's a huge pain. I've seen a lot of similar bugs on this tracker that all
seem to reach a dead-end or involve different components than mine, which leads
me to believe this is not a hardware issue, but an issue with the system
itself.
STEPS TO REPRODUCE
1. Turn off primary monitor
2. Turn it back on
OBSERVED RESULT
After monitor shuts off, panels move to secondary monitor. Upon primary monitor
powering back on, primary's panels remain on second monitor and primary
monitor's desktop background is black, but windows and cursor still remain.
Sometimes panels don't move until the primary monitor is powered back on, it
isn't very consistent.
EXPECTED RESULT
Panels will stay where they belong regardless of monitor power state and
turning the monitor back on will return me to my normal, functioning desktop
SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux: Arch Linux, 6.12.1-arch1-1 kernel
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.0
ADDITIONAL INFORMATION
I am using an X11 session, AMD Ryzen 7 5800X processor, AMD Radeon RX 6800 XT
GPU.
As I mentioned, display configuration changes fix the issue when it occurs. It
seems to refresh the system somehow and will move everything back to where it
belongs and restore my desktop wallpaper.
I also have a DisplayPort adapter on both monitors' HDMI cords (monitor-side
are HDMI, PC-side is DisplayPort), but issue continues to reproduce when
plugged directly into HDMI instead of DisplayPort. I have both monitors on
displayport adapters because if one is displayport and one is HDMI, my boot
screen is always on my secondary monitor which bugs me.
plasmashell is still running after this issue occurs, so it doesn't seem that
plasmashell is crashing.
Even when the panel moves to the secondary monitor, the actual primary monitor
is still accurately indicated as the primary monitor.
When the panels move like this, the panels that SHOULD be on my second monitor
completely disappear, and my secondary monitor gains the primary monitor's
desktop background and icons as well as the panels. It's like it's literally
taking the place of my secondary monitor.
journalctl output seems to vary, so it's difficult to tell what is the cause of
this issue.
gdb output:
[max@maxdesktop ~]$ sudo gdb attach -p $(pidof plasmashell)
[sudo] password for max:
GNU gdb (GDB) 15.2
Copyright (C) 2024 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
attach: No such file or directory.
Attaching to process 1561
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
0x000073653051abb0 in ppoll () from /usr/lib/libc.so.6
(gdb) bt
#0 0x000073653051abb0 in ppoll () from /usr/lib/libc.so.6
#1 0x000073652f6cc227 in ?? () from /usr/lib/libglib-2.0.so.0
#2 0x000073652f668a55 in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3 0x0000736530dbf71d in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt6Core.so.6
#4 0x0000736530b64566 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt6Core.so.6
#5 0x0000736530b59a2f in QCoreApplication::exec() () from
/usr/lib/libQt6Core.so.6
#6 0x00006395c9cb217f in ?? ()
#7 0x0000736530434e08 in ?? () from /usr/lib/libc.so.6
#8 0x0000736530434ecc in __libc_start_main () from /usr/lib/libc.so.6
#9 0x00006395c9cb2695 in ?? ()
(gdb) continue
Continuing.
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