As mentioned in the title. Was upgrading from 17.10. Having this screen flickering.
My GPU is AMD RX480
What I did:
Please help. It is very annoying. I can't work.
I solved it myself by using amdgpu.dc=0 as a boot parameter.
To do this, edit the file /etc/default/grub, for example using
sudoedit /etc/default/grub
Find the line beginning GRUB_CMDLINE_LINUX_DEFAULT and add the text amdgpu.dc=0 between the double quotes (""). Leave any other parameters as they are. For example, you may end up with a line like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.dc=0"
Save the file and exit, and then run
sudo update-grub
to write the configuration, and reboot.
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