[Bug 95040] dock and undock events error i915 driver stack trace dell e5440

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95040

Gary Wang <gary.c.wang at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #16 from Gary Wang <gary.c.wang at intel.com> ---
I saw gpu hung then got drm_kms_helper's kernel panic in you built kernel
4.4.5/i915 driver, but still could not get the whole picture of this issue due
to lacking context of full log. 

ay 05 16:50:38 erista.alterian.com kernel: [drm] stuck on render ring
May 05 16:50:38 erista.alterian.com kernel: [drm] GPU HANG: ecode
7:0:0x84dfbffe, in chromium [837], reason: Ring hung, action: reset
May 05 16:50:38 erista.alterian.com kernel: [drm] GPU hangs can indicate a bug
anywhere in the entire gfx stack, including userspace.
May 05 16:50:38 erista.alterian.com kernel: [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
May 05 16:50:38 erista.alterian.com kernel: [drm] drm/i915 developers can then
reassign to the right component if it's not a kernel issue.
May 05 16:50:38 erista.alterian.com kernel: [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
May 05 16:50:38 erista.alterian.com kernel: [drm] GPU crash dump saved to
/sys/class/drm/card0/error
May 05 16:50:38 erista.alterian.com kernel: drm/i915: Resetting chip after gpu
hang
...
May 05 16:59:28 erista.alterian.com kernel: RIP: 0010:[<ffffffffa04adb55>] 
[<ffffffffa04adb55>] drm_dp_payload_send_msg.isra.10+0xf5/0x190
[drm_kms_helper]
May 05 16:59:28 erista.alterian.com kernel: RSP: 0018:ffff8800d3037a98  EFLAGS:
00010286
May 05 16:59:28 erista.alterian.com kernel: RAX: ffff88020e665280 RBX:
000000006a45f000 RCX: ffff88020f812908
May 05 16:59:28 erista.alterian.com kernel: RDX: ffff8800a2e4af18 RSI:
000000006a45f000 RDI: ffff88020f812908
...

What kind of OS (e.g. Ubuntu/version, Dell's enterprise Ubuntu system...etc.)
do you use for this issue? We need concrete information for analyzing it. 

Could you please try the latest Ubuntu system like 15.04/16.04 to verify this
issue then upload collected log for our analyzing further? Please also use the
latest drm-intel-nightly to verify issue again.

We don't have your Dell docking system and cannot do analysis directly but only
based on your provided information.

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