[Bug 65497] New: Warnings after resume in i915

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65497

          Priority: medium
            Bug ID: 65497
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Warnings after resume in i915
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: zboszor at pr.hu
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

We are working on a prototype Atom-based computer and dmesg shows this warning
on boot:

[drm:intel_enable_lvds] *ERROR* timed out waiting for panel to power on

The machine does have LVDS and is working great.

However, after resuming from S3 suspend, these warnings also appear in dmesg:

WARNING: at drivers/gpu/drm/i915/intel_display.c:3927
intel_modeset_check_state+0xbd/0x539()
active connector not linked to encoder

WARNING: at drivers/gpu/drm/i915/intel_display.c:3933
intel_modeset_check_state+0x119/0x539()

WARNING: at drivers/gpu/drm/i915/intel_display.c:7873
intel_modeset_check_state+0x4d3/0x539()
encoder's active_connectors set, but no crtc

WARNING: at drivers/gpu/drm/i915/intel_display.c:7892
intel_modeset_check_state+0x2c8/0x539()
encoder's computed active state doesn't match tracked active state (expected 0,
found 1)

Full dmesg is also attached. The machine otherwise works okay with modesetting.

Are the warnings unneeded or is the video chip and the LVDS wired improperly
somehow?

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