Thank you Jörg. So I followed the instructions here as AMD GPU from what I read should support my Radeon 520 Mobile https://wiki.debian.org/AMDGPUDriverOnStretchAndBuster2
But I have problems with the installation of both versions 19.3 and 19.5. My kernel is 5.4.0-4-amd64 #1 SMP Debian 5.4.19-1 (2020-02-13) x86_64 GNU/Linux Since there is no linux-headers-5.4.0-4-amd64 package I assume I need linux-headers-5.4.0-4-common but installation still fails. The make.log says: /var/lib/dkms/amdgpu/19.30-934563/build/include/kcl/kcl_drm.h:6:10: fatal error: drm/drmP.h: Datei oder Verzeichnis nicht gefunden / File or directory not found libdrm-dev is installed. I'm confused why it says "Building initial module for 5.5.0-1-amd64" while I don't have that kernel installed. sudo dpkg -i amdgpu-dkms_19.30-934563_all.deb (Lese Datenbank ... 176749 Dateien und Verzeichnisse sind derzeit installiert.) Vorbereitung zum Entpacken von amdgpu-dkms_19.30-934563_all.deb ... ------------------------------ Deleting module version: 19.30-934563 completely from the DKMS tree. ------------------------------ Done. Entpacken von amdgpu-dkms (19.30-934563) über (19.30-934563) ... amdgpu-dkms (19.30-934563) wird eingerichtet ... Loading new amdgpu-19.30-934563 DKMS files... Building for 5.4.0-4-amd64 5.5.0-1-amd64 Building for architecture amd64 Module build for kernel 5.4.0-4-amd64 was skipped since the kernel headers for this kernel does not seem to be installed. Building initial module for 5.5.0-1-amd64 Error! Bad return status for module build on kernel: 5.5.0-1-amd64 (amd64) Consult /var/lib/dkms/amdgpu/19.30-934563/build/make.log for more information. dpkg: Fehler beim Bearbeiten des Paketes amdgpu-dkms (--install): »installiertes amdgpu-dkms-Skript des Paketes post-installation«-Unterprozess gab den Fehlerwert 10 zurück Fehler traten auf beim Bearbeiten von: amdgpu-dkms I'm not sure why xrandr command you refer to specifically. This one? xrandr --listproviders Providers: number : 1 Provider 0: id: 0x46 cap: 0xb, Source Output, Sink Output, Sink Offload crtcs: 4 outputs: 3 associated providers: 0 name:Intel Regards, Martin On Sat, 11 Apr 2020 at 13:48, Jörg-Volker Peetz <jvpe...@web.de> wrote: > > Try it without any /etc/X11/xorg.conf file and read the Debian Stretch part in > the Debian wiki. What's the output of the "xrandr" commands listed in the > wiki? > > Regards, > Jörg. >