[Bug 66301] New: [HSW mobile] resume from s4 sporadically causes call trace and machine is reachable

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66301

          Priority: medium
            Bug ID: 66301
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW mobile] resume from s4 sporadically causes call
                    trace and machine is reachable
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: yangweix.shui at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 81617
  --> https://bugs.freedesktop.org/attachment.cgi?id=81617&action=edit
dmesg: S4 cause call trace sporadically

Environment:
-------------------------
Acer Haswell Notebook Aspire V3 772G 17.3 ; 
Host bridge ID=0x0c04 (rev 06);
VGA ID=0x0416 (rev06);
CPU: i7-4702MQ 2.2GHz; 
BIOS:v1.04 MEM: 4G ;

Kernel: (drm-intel-next-queued)9199918a1e148c18e3519cb7b2d90a127d7ea87b
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Thu Jun 27 17:52:15 2013 +0200

    drm/i915: fix hpd interrupt register locking

Description:
-------------------------
Running S4 on HSW mobile acer product will cause call trace sporadically, It
will reproduced about loop running S4 3 times. The machine is reachable. Remove
i915, S4 works well. I also test another MSI HSW mobile product, S4 is good.
I list the MSI machine info below:
--------
MSI Haswell Notebook MSI MS-16GC Notebook 15.6; 
Host bridge ID=0x0c04 (rev 06);
VGA ID=0x0416 (rev06);
CPU: i7-4700MQ 2.4GHz 
BIOS: E16GCIMS.509 (04/24/2013) EC: 16GCEMS1 ver5.00 (04/12/2013);
ME: 9.0.2.1345;

reproduce step:
-------------------------
1. boot up machine
2. loop running S4 about 3 times.
3. call trace will come up on screen.

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