…and it may so happen that that AMD thing you've installed declares a conflict on any/all of these packages so they get uninstalled when that thing is installed, and to regain F/OSS driver for your card you need to install some of these packages. xserver-xorg-video-radeon: X.Org X server - AMD/ATI Radeon display driver.
xserver-xorg-video-ati: X.Org X server - AMD/ATI display driver wrapper.xserver-xorg-video-amdgpu: X.Org X server - AMDGPU display driver.Note that all APT operations get logged in /var/log/apt/history.log, so if purging that AMD stuff leaves you w/o graphics (you did not tell which precisely-no way to run X and/or Wayland or no 3D (OpenGL)), a way to recover is to read the tail part of that log file to find out what packages were uninstalled and try installing back those which look relevant.Īlso note that the problem might be not with Mesa but with plain X.org driver for AMD hardware-Buster has at least the following packages which provide drivers for AMD video cards:
If anything seems to be gone compared to the list obtained on step 1, install it by apt install. As AMDgpu is part of the monolithic Linux kernel, it is shipped by most Linux distributions directly. Re-check what mesa-related packages you still have installed. AMDgpu has been fully upstreamed and new developments continue to do so. Uninstall that AMD thing using whatever method fits best (purging looks like a good approach). You can check which kernel driver is loaded by running lspci -k. The amdgpu kernel driver needs to be loaded before the radeon. GCN 1) and Sea Islands (HD 8000 Series, CIK, ie. Run dpkg -l '*mesa*'|grep ^.i to list the installed packages which have "mesa" in their names. The linux package enables AMDGPU support for cards of the Southern Islands (HD 7000 Series, SI, ie.
(I have no experience with recent AMD support on Debian so my answer will be a bit generic.)
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