[Bug 89108] New: drm_wait_one_vblank warnings

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89108

            Bug ID: 89108
           Summary: drm_wait_one_vblank warnings
           Product: DRI
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: sitsofe at yahoo.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 113413
  --> https://bugs.freedesktop.org/attachment.cgi?id=113413&action=edit
EeePC dmesg

Description of the problem:
When I boot up a v3.19 kernel on my EeePC 900 I get various drm_wait_one_vblank
warnings.

Steps to reproduce:
1. Boot a v3.19 Linux kernel on an EeePC 900.

Expected results:
No warnings

Actual results:
Warnings like:
[    0.516749] WARNING: CPU: 0 PID: 10 at drivers/gpu/drm/drm_irq.c:1121
drm_wait_one_vblank+0x138/0x170()
[    0.516754] vblank not available on crtc 0, ret=-22

How reproducible is the problem?
It is reproducible every time.

Additional information:
Might be related to https://lkml.org/lkml/2015/1/31/198 .

Version information:
Ubuntu 14.04
EeePC 900
xorg 1:7.7+1ubuntu8
xserver-xorg 1:7.7+1ubuntu8
xserver-xorg-video-intel 2:2.99.910-0ubuntu1.4
Linux kernel 3.19

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