Created attachment 140621 [details] Syslog with visible kernel errors from intel driver. Kernel 3.15.1 blank screen in Xorg. During bootup on text screen only artifacts are shown. Piece of syslog in attachment.
Is this a regression?
Yes. On 3.13 there aren't any problems. On 3.14 there is problem with backlight and on 3.15 graphic card doesn't work.
(In reply to Piotr Rudzki from comment #2) > Yes. On 3.13 there aren't any problems. On 3.14 there is problem with > backlight and on 3.15 graphic card doesn't work. One issue per bug please. Have you reported the backlight issue separately? Is that fixed in 3.15? For the gpu hang, please attach the error state as instructed in the dmesg.
Sorry for my late response. Backlight report is known. https://bugs.freedesktop.org/show_bug.cgi?id=77266 Added dmesg when running 3.15.1 kernel.
Created attachment 141211 [details] dmesg
Could you please grab the error state? https://01.org/linuxgraphics/documentation/how-get-gpu-error-state Also, could you please test latest drm-intel-nightly?
*** Bug 78731 has been marked as a duplicate of this bug. ***
Created attachment 143551 [details] error state from /sys/kernel/debug/dri/0/
Created attachment 143561 [details] error state from /sys/kernel/debug/dri/64/
Do you need any additional feedback?
On 3.16~RC6 system works without problems.
For for me too on 3.16.
(In reply to Piotr Rudzki from comment #11) > On 3.16~RC6 system works without problems. (In reply to Martin Stolpe from comment #12) > For for me too on 3.16. Okay, thanks for the report.