Black out application window on KDE Plasma after long uptime

Question

After using for a long time, application window fails to render application windows.

Problem:

• application screen sometimes blacks out (Attached image)
• occurs in any application (Chrome, Thunderbird, Alacritty, KSettings, Slack, Discord, ..)
• rendering collapsed but the function is alive (terminal application accept commands, Chrome can connect(checked via wireshark))

Condition & How to reproduce

1. after booting up for a several days (about 100 hours)
2. (work as usual)
3. operate window (raise, expand, shrink)
4. sometimes screen blacks out

Actually, I cannot find how to reproduce except long uptime. This problem doesn't occur in first few days.

Error:

# journalctl -b  
Jan 31 08:49:59 arch-desktop kernel: Linux version 6.1.8-arch1-1 (linux@archlinux) (gcc (GCC) 12.2.1 20230111, GNU ld (GNU Binutils) 2.40) #1 SMP PREEMPT_DYNAMIC Tue, 24 Jan 2023 21:07:04 +0000
...
Feb 03 20:40:39 arch-desktop plasmashell[339482]: [339515:339515:0203/204039.778323:ERROR:shared_image_factory.cc(575)] Could not find SharedImageBackingFactory with params: usage: Gles2|Raster|DisplayRead|Scanout, format: RED_8, share_between_threads: 0, gmb_type: shared_memory
Feb 03 20:40:39 arch-desktop plasmashell[339482]: [339515:339515:0203/204039.845182:ERROR:shared_image_factory.cc(575)] Could not find SharedImageBackingFactory with params: usage: Gles2|Raster|DisplayRead|Scanout, format: RG_88, share_between_threads: 0, gmb_type: shared_memory

Memory usage

Seems to be healthy

$ sudo nvidia-smi
Tue Feb  7 15:35:14 2023
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 525.85.05    Driver Version: 525.85.05    CUDA Version: 12.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  On   | 00000000:07:00.0  On |                  N/A |
|  0%   42C    P8    28W / 270W |   4288MiB /  8192MiB |     47%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+

Environment

• OS: Arch Linux (Kernal: 6.1.8)

  $ uname -a
  Linux arch-desktop 6.1.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Tue, 24 Jan 2023 21:07:04 +0000 x86_64 GNU/Linux
  

• Desktop: KDE Plasma (5.26.5)

  $ plasmashell --version
  plasmashell 5.26.5
  

Question

Where is the problem occurs on (or how to find) ? Is this a kernel bug or kwin bug ?

I'm really annoying for this problem, and I can use my time for this problem. But I cannot find where is the correct place to contribute, because Linux and KDE project is very big.

Update - 2023-10-18

After a long struggle, I have found a some clue. I compare process tree (ps auxf) of when the bug occurs and not occurs. It usually looks the same, but sometimes be different like this:

\_ /usr/bin/kwin_x11 --replace
|   |   \_ [cat] <defunct>

When I restart the process, the problem resolved without logout.

so, the following command is the trick for this problem.

kwin_x11 --replace

Answer 1

Great post. I have the same dilemna.

blackout on right click

It's very inconsistent, but seems to accumulate once it starts. I remedied this with the process manager, and appreciate your suggestion with kwin_x11 --replace

I use brave and firefox often simultaneously and it seems to ravenge firefox windows worst. The browser itself still visible but the viewport contents blacked out, or the right click menu.

I'm going to do an update today, let you know if that improves, as I'm running a raw install: Operating System: Kubuntu 23.04 KDE Plasma Version: 5.27.4 KDE Frameworks Version: 5.104.0 Qt Version: 5.15.8 Kernel Version: 6.2.0-20-generic (64-bit) Graphics Platform: X11 Processors: 8 × Intel® Core™ i7-4790K CPU @ 4.00GHz Memory: 23.3 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 960/PCIe/SSE2 NVIDIA-driver-525

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