You are right, I had forgotten about the PPA and hadn't paid close
enough attention when posting the bug originally.
Please accept my apologies.
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1926009
Also you have unsupported graphics packages installed, one of which was
the package you rolled back.
In future please ensure you are not using any PPAs before reporting bugs
to Ubuntu.
** Changed in: xserver-xorg-video-amdgpu (Ubuntu)
Status: Incomplete => Invalid
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