#apt purge xserver-xorg-video-amdgpu xserver-xorg-video-ati:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer
required:
apper apper-data espeak-ng-data fonts-symbola gir1.2-atspi-2.0
gir1.2-wnck-3.0 hyphen-en-us kdeaccessibility kmag kmousetool kmouth
libatk-adaptor libbrlapi0.8
libc-ares2 libdotconf0 libespeak-ng1 libjs-highlight.js libnode72
libpcaudio0 libqaccessibilityclient-qt5-0 libreoffice-help-common
libreoffice-help-en-us
libreoffice-kf5 libreoffice-plasma libreoffice-qt5 libsonic0
libstartup-notification0 libu2f-udev libwnck-3-0 libwnck-3-common
mythes-en-us node-normalize.css
nodejs nodejs-doc orca perl-tk policykit-1-gnome print-manager
python3-brlapi python3-louis python3-pyatspi python3-speechd python3-xdg
qtgstreamer-plugins-qt5
sound-icons speech-dispatcher speech-dispatcher-audio-plugins
speech-dispatcher-espeak-ng x11-apps x11-session-utils xbrlapi xinit
xkbset xorg
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
task-desktop* task-kde-desktop* xserver-xorg-video-all*
xserver-xorg-video-amdgpu* xserver-xorg-video-ati*
0 upgraded, 0 newly installed, 5 to remove and 1 not upgraded.
After this operation, 712 kB disk space will be freed.
Do you want to continue? [Y/n]
Anyway I solved the initial issue. Apparently, the boot parameter
`radeon.dpm=0` solved the initial issue. Apparently, on newer kernels
(testing) the boot parameter is automatically set 1 and caused issues.
However I checked xorg website and they stated dpm is compatible with
Southern Islands, but I am not sure.
