[Bug 79418] [i855GM] *ERROR* mismatch in adjusted_mode.crtc_clock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79418

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #2 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to comment #0)
> I'm running updated ubuntu trusty on an intel 855GM platform. On startup I
> get the attached error message. There are minor graphics problems when
> running X: some characters are displayed as black boxes in the firefox
> address bar everything else seems to be OK.
> 
> xserver-xorg-video-intel 2:2.99.910-0ubuntu1
> libdrm 2.4.52-1
> 
> [   36.450103] [drm:intel_pipe_config_compare] *ERROR* mismatch in
> adjusted_mode.crtc_clock (expected 79500, found 39735)

I suspect this is fixed by:

commit b1c560d13d1aab194b467ca33d0be6ca6e829ee5
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Mon Dec 9 18:54:13 2013 +0200

    drm/i915: Extract p2 divider correctly for gen2 LVDS dual channel

Can you try cherry-picking that to 3.13 or alternatively just try 3.14 which
has it already included. We may want to get that into stable kernels.

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