Bug 353667 - [NVIDIA Optimus] sometimes suddenly letters are just squares
Summary: [NVIDIA Optimus] sometimes suddenly letters are just squares
Status: RESOLVED UPSTREAM
Alias: None
Product: plasmashell
Classification: Plasma
Component: general (show other bugs)
Version: 5.23.5
Platform: Other Linux
: NOR normal
Target Milestone: 1.0
Assignee: David Edmundson
URL:
Keywords:
: 464620 (view as bug list)
Depends on:
Blocks:
 
Reported: 2015-10-07 20:17 UTC by arne anka
Modified: 2023-04-27 20:52 UTC (History)
5 users (show)

See Also:
Latest Commit:
Version Fixed In:


Attachments
example of distorted fonts (18.58 KB, image/png)
2015-10-07 20:17 UTC, arne anka
Details
fonts settings (11.32 KB, image/png)
2015-10-07 20:18 UTC, arne anka
Details

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Description arne anka 2015-10-07 20:17:05 UTC
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
Comment 1 arne anka 2015-10-07 20:17:29 UTC
Created attachment 94881 [details]
example of distorted fonts
Comment 2 arne anka 2015-10-07 20:18:00 UTC
Created attachment 94882 [details]
fonts settings
Comment 3 David Edmundson 2016-04-29 14:25:16 UTC

*** This bug has been marked as a duplicate of bug 354731 ***
Comment 4 Nate Graham 2021-08-31 19:38:39 UTC

*** This bug has been marked as a duplicate of bug 364766 ***
Comment 5 arne anka 2021-12-22 17:23:10 UTC
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.
Comment 6 arne anka 2021-12-22 17:24:13 UTC
Nor is it to do with the Nvida driver. While this is an optimus device, Nvidia is disabled and I use Intel exclusively.
Comment 7 Nate Graham 2021-12-23 16:30:23 UTC
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.
Comment 8 Bug Janitor Service 2022-01-07 04:35:04 UTC
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!
Comment 9 arne anka 2022-01-07 07:21:04 UTC
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
Comment 10 Bug Janitor Service 2022-01-22 04:37:23 UTC
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!
Comment 11 arne anka 2022-01-25 07:54:00 UTC
What exactly is that ping pong "plasmashell -> kwin -> plasmashell" supposed to achieve?
Comment 12 Nate Graham 2023-04-27 20:50:56 UTC
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!
Comment 13 Nate Graham 2023-04-27 20:51:18 UTC
*** Bug 464620 has been marked as a duplicate of this bug. ***