Public bug reported:
Summery: I'm having a hard time tracing this down. I updated to Kubuntu
16.04 (from Kubuntu 15.10 - that was using the Linux Crimson 15.12
driver) a couple days ago on my notebook (HP Pavilion, A10-8700P APU),
and ever since I've been having random black screens. I started
debugging the driver, then thought it might be a DPMS issue (it's not -
I have DPMS fully disabled currently), and now I'm back to debugging the
driver. I don't have any remnants of the former closed Crimson display
driver and never had an xorg.conf file (I made a small one that I'm
using at the moment consisting of only a server layout to ensure screen
savers, DPMS, etc are all off). The Black screen can happen any time
from the login screen until hours later. I can ssh into the system to
shut it down. And just discovered that if I unplug the system from it's
power brick, I can close the lid - the system will goto sleep. When I
flip the screen back up, the system wakes up and the screen works again
for 1-2 minutes. I don't see any errors in the log files (well, outside
some nasty looking ACAPI errors in dmesg).
Steps to reproduce: boot system and use normally or simply leave system
alone. Blank screen will happen any time after x comes up.
Expected results: Screen doesn't blank unless a screen saver or power
saver kicks in.
System info: Purchased Dec 2015 (build date from BIOS - Aug 2015), HP
Pavilion 15" notebook, AMD A10-8700P "Carrizo", 16GB RAM, 960GB SSD
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1577074
Title:
AMDGPU driver problems on "Carrizo" APU
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