Created attachment 133878 [details]
error information from /sys/class/drm/card0/error
Periodically I get short freezes that sometimes recover but most of the time crash X. Also, when monitors go into power save in extended display only the primary comes back up. I have to mirror and then extend to get second monitor to power back up.
The crashing seems to be random. Not related to usage. Happens less than once every two weeks.
Dell Precision Tower 3420 Board 08K0X7
Dual head DP, HDMI
[80673.843014] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[81289.351307] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg , reason: Hang on render ring, action: reset
[81289.351309] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[81289.351310] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[81289.351311] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[81289.351312] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[81289.351313] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[81289.351363] drm/i915: Resetting chip after gpu hang
[81289.351422] [drm] RC6 on
[81289.367377] [drm] GuC firmware load skipped
[81301.350849] drm/i915: Resetting chip after gpu hang
[81301.350916] [drm] RC6 on
[81301.369337] [drm] GuC firmware load skipped
00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 07)
00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06)
xorg 1:7.7+19 amd64 X.Org X Window System
ii xserver-xorg-video-intel 2:2.99.917+git20161206-1 amd64 X.Org X server -- Intel i8xx, i9xx display driver
(In reply to Jake from comment #0)
> Created attachment 133878 [details]
> error information from /sys/class/drm/card0/error
> Periodically I get short freezes that sometimes recover but most of the time
> crash X. Also, when monitors go into power save in extended display only
> the primary comes back up. I have to mirror and then extend to get second
> monitor to power back up.
> The crashing seems to be random. Not related to usage. Happens less than
> once every two weeks.
The blank screen is a separate issue to the hang+crash. Can you file another bug reported with a drm.debug=0xe dmesg from the time of the blank screen?