[Bug 106443] [drm] GPU HANG: ecode 9:0:0x859ffffb, in Xorg [2092], reason: hang on rcs0, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106443

--- Comment #3 from Simeon Miteff <simeon.miteff at gmail.com> ---
The old kernel was Ubuntu's 4.4.0-122.146-generic.

Based on what is currently in Xenial, I believe the old userspace had:

Intel driver: 2.99.917+git20160325
Mesa: 11.2.0

Let me know if accuracy is critical (I think can search /var/log/apt/ to find
the exact versions).

I booted the old kernel (same upgraded userspace), and reproduced the error.
This time Xorg crashed once after login and then started again. This time
kernel messages where a little more colorful than before:

[   54.764325] [drm] stuck on render ring
[   54.764435] [drm] GPU HANG: ecode 9:0:0x85dffffb, in Xorg [2102], reason:
Engine(s) hung, action: reset
[   54.764436] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[   54.764437] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[   54.764438] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[   54.764438] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[   54.764439] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[   54.766472] drm/i915: Resetting chip after gpu hang
[   56.764626] [drm] RC6 on
[   72.756913] [drm] stuck on render ring
[   72.757189] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [2102], reason:
Engine(s) hung, action: reset
[   72.759030] drm/i915: Resetting chip after gpu hang
[   73.792203] [drm] RC6 on
[   75.850856] usb 1-8: reset high-speed USB device number 3 using xhci_hcd
[   84.749848] [drm] stuck on render ring
[   84.750103] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [2102], reason:
Engine(s) hung, action: reset
[   84.751978] drm/i915: Resetting chip after gpu hang
[   86.748842] [drm] RC6 on
[  165.726069] [drm] stuck on render ring
[  165.726437] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [3066], reason:
Engine(s) hung, action: reset
[  165.728202] drm/i915: Resetting chip after gpu hang
[  167.724909] [drm] RC6 on
[  185.713779] [drm] stuck on render ring
[  185.714098] [drm] GPU HANG: ecode 9:0:0x85dffffb, in Xorg [3066], reason:
Engine(s) hung, action: reset
[  185.715884] drm/i915: Resetting chip after gpu hang
[  187.712852] [drm] RC6 on

I uploaded the corresponding error state.

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