https://bugs.freedesktop.org/show_bug.cgi?id=78453 --- Comment #78 from Kai --- Ahrg, comment #77 was only half of what I wanted to add... (screwed the C&P up) In Xorg.0.log I'm seeing > (EE) Error config_odev_get_int_attribute called for non integer attrib 4 no matter whether I force acceleration on or not. Not sure, this is relevant though. In case I force HAWAII acceleration (same settings as Luzipher in comment #9) on I end up with a black screen and the system is inaccessible directly. Over SSH I found, that no error is logged to either Xorg.0.log or dmesg (I checked journalctl as well, just to be sure, but nothing there as well). Issuing a reboot command over SSH didn't work either. Would I need to set some kernel variable to get info about a locked-up GPU? The stack I used was (base is Debian Testing): GPU: Hawaii PRO [Radeon R9 290] (ChipID = 0x67b1) Linux: 3.15.5 libdrm: 2.4.54-1 LLVM: SVN:trunk/r213236 libclc: Git:master/0ec7437d9c Mesa: Git:master/48deb4dbf2 DDX: 1:7.4.0-2 X: 2:1.15.99.904-1 (1.16.0 RC 4) -- You are receiving this mail because: You are the assignee for the bug.