sometimes, fonts are distorted, that is letters are just black squares of varying sizes. if it happens to be in a ui that can be forced to re-render (like klipper or calendar widget), it helps to close/reopen. sometimes it even is sufficient to move the mouse over then distorted text. see attached screen shots for an example (ui1.png: folder view widget configuration) and the fonts used (ui2.png). Reproducible: Sometimes
Created attachment 94881 [details] example of distorted fonts
Created attachment 94882 [details] fonts settings
*** This bug has been marked as a duplicate of bug 354731 ***
*** This bug has been marked as a duplicate of bug 364766 ***
I don't think this is a duplicate of #364766 -- in my case it has nothing to do with suspend/resume nor does it affect anything but letters. Since a while now least it does restore itself reliably after a while (moving the mouse in and out of the affected area) and does not persist until a reboot/plasma restart anymore.
Nor is it to do with the Nvida driver. While this is an optimus device, Nvidia is disabled and I use Intel exclusively.
Either way, this is an upstream issue related to the graphics drivers. If it's not Bug 364766, it's a something similar. What Qt version are you using? That bug was supposed to have been fixed in Qt 5.13.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
Operating System: Debian GNU/Linux KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 Kernel Version: 5.15.0-2-amd64 (64-bit) Graphics Platform: X11 Processors: 8 × Intel® Core™ i7-4700MQ CPU @ 2.40GHz Memory: 15,3 GiB of RAM Graphics Processor: Mesa DRI Intel® HD Graphics 4600
What exactly is that ping pong "plasmashell -> kwin -> plasmashell" supposed to achieve?
This is an issue problem is in the proprietary NVIDIA drivers. Please report this issue to the NVIDIA folks, either by sending an email to linux-bugs@nvidia.com or making a post at https://forums.developer.nvidia.com/c/gpu-graphics/linux. It would be helpful to the NVIDIA developers if you could run nvidia-bug-report.sh and attach the resulting file in your report. Thanks!
*** Bug 464620 has been marked as a duplicate of this bug. ***