The radeon graphics driver is unable to work properly, probably because
you are stuck in recovery mode where kernel mode setting has been
disabled:
[ 68.968] Kernel command line:
BOOT_IMAGE=/boot/vmlinuz-4.15.0-38-generic
root=UUID=010804b7-21f1-4e4e-a968-18ae8286fbf2 ro recovery nomodeset
To fix this, please reboot and tap Escape immediately as soon as you see
the first purple screen. Now navigate the menus and find the default
kernel option that is not recovery mode.
When done, please confirm the correct change has been made by running:
cat /proc/cmdline
** Tags added: radeon
** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)
** Changed in: xorg-server (Ubuntu)
Status: New => Incomplete
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1799327
Title:
screen display
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1799327/+subscriptions
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