Asked question on AskUbuntu (https://askubuntu.com/q/995093/66509).
Fixed by blacklisting `radeon`:
cat <<EOF | sudo tee /etc/modprobe.d/blacklist-radeon.conf # blacklist radeon module to allow run at least Scilab after Mesa upgrade blacklist radeon EOF
sudo update-initramfs -k all -u
Asked question on AskUbuntu (https:/ /askubuntu. com/q/995093/ 66509).
Fixed by blacklisting `radeon`:
cat <<EOF | sudo tee /etc/modprobe. d/blacklist- radeon. conf
# blacklist radeon module to allow run at least Scilab after Mesa upgrade
blacklist radeon
EOF
sudo update-initramfs -k all -u