Public bug reported:
On my ubuntu 16.04.3 system, the update to kernal 4.13.0-26.29~16.04.2
(which also came in installing 4.13.0.26.39,although that wasn't the one
that was running when the issue occurred). After a reboot, x broke,
with the boot initially started on the my left screen (the run running
on an r9 390), and switched to my right screen (Running off the
integrated gpu of my Intel 4690-k), where it looked normal. For about
two minutes, the screen would very quickly blink about 3 times a second.
During this period typing was difficult, with many keypresses randomly
missing. However that issue quickly went away.
Initially I thought it was a compatibility issue with amdgpu-pro
(17.04), however once I uninstalled that, the issue continued unchanged.
(where then my system was running the version of amdgpu from the oibaf
ppa). Once I managed to return to old kernal, my system returned
completely back to normal.
I can tell more system details, however won't help with more details of
the bug, and I don't want to replicate it and break my system again. I
am sorry however that I forgot to take a picture of both screens to show
what was going wrong during boot, and the point at where it switched
screens.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1743830
Title:
Kernel 4.13.0 update causing x to not load properly using amdgpu
graphics on ubuntu 16.04.3
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