X unstable / integrated graphics chipset

[Seb <seb@h-k.fr>]

Hello,


Last week I installed Debian 13.1 on a new machine.

I have problems with the graphics part: X launches, provides basic 
functionality, but it is unstable.

Copy-pasting a couple dozen lines from one xterm to another reliably 
crashes X.

Opening a new tab in Firefox sometimes crashes X too.

Besides, xrandr offers no resolution higher than 1920x1280 whereas the 
screen's native resolution is 2560x1440.

All this may be linked to the fact that there is no separate graphics 
card, only a chipset integrated into the CPU.

I hoped this choice would provide silence at a fair price, but it may be 
bringing chaos instead.

lshw suggest that Linux recognizes that there is an integrated chipset:
      *-cpu
           description: CPU
           product: AMD Ryzen 7 8700G w/ Radeon 780M Graphics
      *-display
           description: VGA compatible controller
           product: Phoenix1
           vendor: Advanced Micro Devices, Inc. [AMD/ATI]
"Phoenix1" seems to be the name of the architecture used by AMD for its
integrated graphics chipsets in Ryzen 7 processors.

I followed the steps from the wiki:
 	https://wiki.debian.org/AtiHowTo

~> lspci -nn | grep VGA
78:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix1 [1002:15bf] (rev 06)

I purged '*nvidia*' and installed firmware-amd-graphics etc.

radeontop says the chipset is named UNKNOWN_CHIP.

The problems remained after a reboot.


Am I missing something?

Have I done something obviously wrong?

Is it logical to suspect that the driver may be unreliable?

If so, how can I change it for a proprietary driver?

Any idea welcome :-)


Sébastien.