Misplaced material and horizontal pixeled lines, sometimes flickering, inside firefox window. This happens in complex websites with pictures, animations, banners. The same for window elements in some Gtk GUIs (even as simple as synaptic). All of this usually appears when scrolling up and down in windows. Finally, after a few minutes, the system hangs (freezes).
After hard days of reading and learning on the web, my attempts have been:
- 1) debian buster -> no video
2) debian buster + upgrade to kernel 5.4.0 (via buster-backports) + firmware-linux-nonfree (buster-backports package, which includes the latest firmware-amd-graphics package with the ampgpu driver) -> video but with the mentioned inestabilities
3) debian testing + firmware-linux-nonfree package -> same result
- 4) ubuntu 20.04 (5.4.0 kernel) with non-free software option -> same result
5) linux mint 19.3 (5.0.0 kernel) with non-free software option -> working well, although vertical scrolling is not as smooth as, for example, in windows 10 SO.
When checking related software (X server, mesa, etc), apparently Mint and Debian Buster uses similar versions.
Bios configuration must be right because Mint works with the default settings.
Obviously my goal is to make it work on Debian. It seems to be posible for APUs with Vega 8 graphics (AMD Ryzen 3500U, 2200G and others):
https://wiki.debian.org/AMDGPUDriverOnStretchAndBuster2
https://www.computerbase.de/forum/threads/3200g-3400g-und-debian-10.1914647/
Technical details:
APU: CPU AMD Ryzen 3400G + GPU Radeon Rx Vega 11
MO: B450-I-AORUS-PRO
SO: Debian 10, upgraded/updated to backports packages when possible.
(note: mesa v19.0 -the version used by Mint-, is not yet backported to Debian 10. However, this shound not be the problem, while v19.0 do not work on debian testing release either.)