This bug affects me on Ubuntu 16.04, but not on 15.10 where the fglrx drivers are still available. I have the graphics card A10-8700P APU "Carrizo" on my HP ProBook 455 G3 laptop. Like Joshua above, but only on 16.04, I can only get past the black screen if I boot into low-graphics mode with the nomodeset parameter.
However, in my web search regarding this issue, I found a recommendation at https://bugzilla.kernel.org/show_bug.cgi?id=117591 Comment #7, to append "amdgpu.runpm=0" to the kernel command line in Grub setparams. I'm going to try that with the Ubuntu 16.04 LiveUSB and report back. ** Bug watch added: Linux Kernel Bug Tracker #117591 http://bugzilla.kernel.org/show_bug.cgi?id=117591 -- 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
