[Bug 71978] New: intel_get_pipe_from_connector warning during suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71978

          Priority: medium
            Bug ID: 71978
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: intel_get_pipe_from_connector warning during suspend
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: tod.jackson at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 89729
  --> https://bugs.freedesktop.org/attachment.cgi?id=89729&action=edit
full dmesg after pm-suspend

Hi there,

Everything seems to be in working order despite, but I thought I'd mention a
kernel warning I just saw when testing pm-suspend on 3.13-rc1. 

[10758.966179] ------------[ cut here ]------------
[10758.966189] WARNING: CPU: 0 PID: 13698 at
drivers/gpu/drm/i915/intel_display.c:9948
intel_get_pipe_from_connector+0x4c/0x50()
[10758.966219] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops
videobuf2_core videodev brcmsmac nouveau coretemp kvm_intel cordic brcmutil kvm
snd_hda_codec_hdmi ttm dell_wmi snd_hda_codec_realtek bcma mxm_wmi wmi atl1c
intel_ips snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc
snd_timer snd
[10758.966223] CPU: 0 PID: 13698 Comm: kworker/u16:13 Not tainted 3.13.0-rc1 #1
[10758.966224] Hardware name: Alienware M11x R2/M11x R2, BIOS A04 11/23/2010
[10758.966231] Workqueue: events_unbound async_run_entry_fn
[10758.966234]  0000000000000009 ffff88016e9bfaf8 ffffffff8166c685
0000000000000000
[10758.966236]  0000000000000000 ffff88016e9bfb38 ffffffff81044127
ffff88016e9bfb28
[10758.966238]  ffff8801729a1800 ffff8800770c8000 00000000000c7204
ffff8801729a1800
[10758.966239] Call Trace:
[10758.966247]  [<ffffffff8166c685>] dump_stack+0x46/0x58
[10758.966252]  [<ffffffff81044127>] warn_slowpath_common+0x87/0xb0
[10758.966255]  [<ffffffff81044165>] warn_slowpath_null+0x15/0x20
[10758.966258]  [<ffffffff8139b43c>] intel_get_pipe_from_connector+0x4c/0x50
[10758.966263]  [<ffffffff813b50bb>] intel_panel_disable_backlight+0x2b/0x190
[10758.966266]  [<ffffffff813a037a>] intel_disable_lvds+0x5a/0x160
[10758.966269]  [<ffffffff81390dbe>] ironlake_crtc_disable+0x1ae/0x920
[10758.966273]  [<ffffffff813445dd>] ? drm_irq_uninstall+0xdd/0x1c0
[10758.966278]  [<ffffffff8135b4f2>] i915_drm_freeze+0xd2/0x150
[10758.966280]  [<ffffffff8135ba71>] i915_pm_suspend+0x41/0xa0
[10758.966286]  [<ffffffff812a26c2>] pci_pm_suspend+0x72/0x140
[10758.966294]  [<ffffffff813e79d5>] ? __pm_runtime_barrier+0x15/0x130
[10758.966297]  [<ffffffff812a2650>] ? pci_pm_freeze+0xd0/0xd0
[10758.966308]  [<ffffffff813e49e1>] dpm_run_callback+0x41/0x80
[10758.966325]  [<ffffffff813e4b0b>] __device_suspend+0xeb/0x260
[10758.966333]  [<ffffffff810716a0>] ? try_to_wake_up+0x100/0x290
[10758.966342]  [<ffffffff813e552a>] async_suspend+0x1a/0xa0
[10758.966344]  [<ffffffff8106a566>] async_run_entry_fn+0x36/0x130
[10758.966353]  [<ffffffff8105dc9f>] process_one_work+0x17f/0x420
[10758.966358]  [<ffffffff8105e389>] worker_thread+0x119/0x370
[10758.966363]  [<ffffffff8105e270>] ? rescuer_thread+0x2f0/0x2f0
[10758.966368]  [<ffffffff81064bf4>] kthread+0xc4/0xe0
[10758.966373]  [<ffffffff81064b30>] ? flush_kthread_worker+0x70/0x70
[10758.966382]  [<ffffffff8167b4bc>] ret_from_fork+0x7c/0xb0
[10758.966384]  [<ffffffff81064b30>] ? flush_kthread_worker+0x70/0x70
[10758.966386] ---[ end trace 5a95337b2336b1af ]---

I attached the full dmesg.

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