I'm also experiencing this on Kubuntu 21.10
In my case I'm also experiencing missing letters on texts, and other rendering
problems.
Kernel version 5.13.0.27 (64b)
In my case the computer is a HP Envy 4 with a intel I3-2367M.
Graphic processor is: MESA DRI INTEL HD Graphics 3000.
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You received
This bug affects me too.
Ubuntu 20.04 with Gnome. The bug appears when using Firefox in my case.
Downgrading the kernel to 5.4 series solves the issue. I have to downgrade from
5.11, the last version of the Hardware Enablement Stack. The bug is present on
5.11 and 5.8 versions.
Intel(R) Core(TM
Same here. Still not fixed in 5.8.0-63.
Package installed:
linux-generic-hwe-20.04/focal-updates,focal-security,now 5.8.0.63.71~20.04.45
amd64 [installed]
Downgrade to 5.8.0-43-generic fixes the issue.
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
m
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-signed-hwe-5.8 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1934652