Verified libgl1-mesa-dri_21.3.0~rc5-1_amd64.deb from Debian, it works.
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https://bugs.launchpad.net/bugs/1944951
Title:
KDE delayed display update / konsole artifacts
To manage
Package libgl1-mesa-dri, file iris_dri.so
** Package changed: kwin (Ubuntu) => mesa (Ubuntu)
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https://bugs.launchpad.net/bugs/1944951
Title:
KDE delayed display update / konsole
Thanks to the tests done by Michael it was easy to figure out the file in
question.
It's the file iris_dri.so from package libgl1-mesa-dri.
Taken it from 21.0.3 and it worked.
Don't know if it's safer just to replace this file or all Mesa libraries.
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Tried a few more things:
Booted from the Kubuntu 21.10 live beta DVD, problem persists.
Booted from KDE Neon DVD, no artefacts.
Turned on composite management, started a new konsole. Turned off composite
management.
Konsole display is without errors. So I can have one konsole with problems and
Maybe this helps:
I'm using a somewhat newer version of the Intel VGA:
00:02.0 VGA compatible controller: Intel Corporation CometLake-S GT2 [UHD
Graphics 630] (rev 03)
and I do not have an additional Nvidia card.
Switching from modesetting_drv.so to intel_drv.so also causes the
problem is
It looks that I'm struck by the same bug. For me all KDE applications
show display problems, not only just konsole. But konsole is the one
that's used most often.
After you have "fixed" you installation now, could you please turn off the
composite manager.
Just use Shift-Alt-F12 for that. I do
Thank you.
It works also with the HVR3000. :-)
Great work.
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HVR-1300 HVR-3000 HVR-4000 broken in kernel
https://bugs.launchpad.net/bugs/439163
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