[Bug 91241] Get "vblank not available on crtc 1" warning with 3.19-rc1 onwards

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=91241

--- Comment #2 from William <wjfgb at mypostoffice.co.uk> ---
As my timeouts are fairly long I had not previously realised the problem
with kernels 3.17.n and 3.18.n - so a correction is needed to my original
report. [I do not currently have 3.15.n or 3.16.n installed - but could
test them if needed.]

I have done some more testing (including 3.19-rc5) :-

Kernel   | Console goes |  X start | X awakes from
         | to sleep     |          | Blank/Standby/Suspend/Off.
----------------------------------------------------------------
         |              |          |
3.14.28  | Ok           |  Ok      |  Ok     Ok     Ok     Ok    
         |              |          |
3.17.3   | Ok           |  Ok      |  Trace  Trace  Trace  Trace 
         |              |          |
3.18.3   | Ok           |  Ok      |  Trace  Trace  Trace  Trace 
         |              |          |
3.19-rc1 | Trace        |  Trace   |  Trace  Trace  Trace  Trace 
         |              |          |
3.19-rc5 | Trace        |  Trace   |  Trace  Trace  Trace  Trace 
         |              |          |

The three events which can cause a warning/trace are :-

    The console (no X running) goes to sleep.
    X Starts up
    X awakens after a Blank/Standby/Suspend/Off.

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