Created attachment 120542 [details]
lspci -v output
[ 7580.121408] [drm] stuck on render ring
[ 7580.121838] [drm] GPU HANG: ecode 6:0:0x85fffffc, in chrome , reason: Ring hung, action: reset
[ 7580.121840] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 7580.121841] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 7580.121842] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 7580.121842] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[ 7580.121843] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7580.123937] drm/i915: Resetting chip after gpu hang
Running Ubuntu 15.10 and Gnome Shell + Chrome Version 47.0.2526.106 (64-bit)
Manufacturer: Apple Inc.
Product Name: Macmini5,3
Created attachment 120543 [details]
Sorry no one ever investigated your bug.
The good news is that everything seems to be working on kernel 4.9.5 and
Please reopen if you can still reproduce with Mesa 17.0.