[Bug 61861] [snb regression] ThinkPad T420 + kernel 3.8.x + external VGA display == wrong resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61861

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #14 from Daniel Vetter <daniel at ffwll.ch> ---
Yeah, I think this one here is wontfix since we've intentionally stopped adding
tons of modes - they've actually been added wrongly in some cases:

commit 740922ee575f8ee4daa2bfd3db5f69dd7573fc76
Author: Paulo Zanoni <paulo.r.zanoni at intel.com>
Date:   Fri Feb 15 13:36:27 2013 -0200

    drm: don't add inferred modes for monitors that don't support them

    commit 196e077dc165a307efbd9e7569f81bbdbcf18f65 upstream.

    If bit 0 of the features byte (0x18) is set to 0, then, according to
    the EDID spec, "the display is non-continuous frequency (multi-mode)
    and is only specified to accept the video timing formats that are
    listed in Base EDID and certain Extension Blocks".

    For more information, please see the EDID spec, check the notes of the
    table that explains the "Feature Support" byte (18h) and also the
    notes on the tables of the section that explains "Display Range Limits
    & Additional Timing Description Definition (tag #FDh)".

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729
    Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
    Reviewed-by: Adam Jackson <ajax at redhat.com>
    Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
    Signed-off-by: Dave Airlie <airlied at redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>

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