OK, I tried the "amdgpu.runpm=0" solution with the Ubuntu 16.04 LiveUSB and while it booted in high graphics mode, I still got the black screen after a few minutes.
Christopher, I have done as you asked in Comment #15 on this thread, and the bug report I filed is at https://bugs.launchpad.net/ubuntu/+source/xorg/+filebug/34a9fa5a- 51e8-11e6-8b1c-68b5996a96c8? However I don't know how this will do any good, as I'm running Ubuntu 15.10, not 16.04 where the problem occurs. I wish AMD or Canonical or whoever is responsible for the decision to make fglrx unavailable in 16.04 would reconsider and provide for a smoother transition by allowing users with graphics cards that are still unsupported by amdgpu to "opt- in" to fglrx until AMD works out the all the kinks. It's as if they just don't care about end users whatsoever. Man, am I frustrated! -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1577074 Title: AMDGPU driver problems on "Carrizo" APU Status in xorg package in Ubuntu: Incomplete Bug description: 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). HOT TO REPRODUCE: Boot system and use normally or simply leave system alone. Blank screen will happen any time after x comes up. EXPECTED RESULT: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1577074/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
