Artifacts in display on Kubuntu 20.10

Question

Since a few days, I'm seeing strange artifacts in Kubuntu 20.10 on both of my monitors. See https://i.stack.imgur.com/HHw84.jpg for two examples. Because I'm seeing it on both of my monitors and only while using Ubuntu (not Windows), I guess it is a software issue. Some info:

Operating System: Kubuntu 20.10
KDE Plasma Version: 5.19.5 KDE
Processors: 4 × Intel® Core™ i5-3470S CPU @ 2.90GHz
Memory: 15,5 GiB of RAM Graphics Processor:
Mesa DRI Intel® HD Graphics 2500

Let me know if more info is required.

Edit your question and show me uname -r and ls -al /boot. — heynnema, Apr 28 '21 at 21:28
Unfortunately, when trying to boot from a reinstalled -48, I get stuck at "loading initial ram disk". Guess I'll wait for a fix? — Ruben, Apr 29 '21 at 18:05
Edit your question and show me ls -al /boot. How did you reinstall -48? Start comments to me with @heynnema or I'll miss them. — heynnema, Apr 29 '21 at 19:01
See my answer at https://askubuntu.com/questions/1333025/strange-graphics-issues-such-as-flickering-application-windows-and-inconsistent — heynnema, May 02 '21 at 16:27

score 1 · Accepted Answer · answered May 03 '21 at 17:25

Solved by @heynnema in answer https://askubuntu.com/a/1333040/1282, many thanks!

Briefly,

sudo apt install linux-headers-5.8.0-48 linux-headers-5.8.0-48 linux-image-5.8.0-48-generic linux-modules-5.8.0-48-generic linux-modules-extra-5.8.0-48-generic
sudo update-initramfs -c -k 5.8.0-48-generic
sudo update-grub
reboot

Solved my issues for now, until -51 is available.

Artifacts in display on Kubuntu 20.10

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