[Bug 27452] Evergreen KMS DRM sets bizarre 1922x1200 resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27452

--- Comment #10 from Dave Witbrodt <dawitbro at sbcglobal.net> 2010-08-07 09:59:31 PDT ---
Created an attachment (id=37676)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=37676)
dmesg from 2.6.35 with drm.debug=15

I have still been testing kernels to see if this bug goes away, but there has
been no change since last time I posted to this bug.  Today, I tested the HD
5750 card with 2 kernels:

  - A much older kernel, which I had forgotten to test with the 5750:
    linux 2.6.34 + drm-radeon-testing (up to commit 0818fe9 of 04/29/2010)

  - linux 2.6.35 (built on 08/01/2010)

Both kernels still result in a pinkish/purplish vertical line along the entire
left side of the screen when using the HDMI cable.

Using a HD 4850 card with both kernels (and HDMI) works fine.

Looking carefully, I am noticing that (with the 5750) there is also a black gap
at the top and on the left -- maybe 2 or 3 mm wide.  The bug also has always
caused the monitor's onscreen display to report 1922x1200 resolution (the 1922
should be 1920, of course); this doesn't happen with the 4850 card.

I believe also that the pink vertical line (a few pixels wide) may be before
the addressable pixels of the screen.  That is, I'm not sure that I'm losing
actual screen space to the pink line, but that the image that ought to be
displayed is actually just shifted to the right (and down) from where it ought
to be.  Seems like the sort of timing problem one might have seen in the old
days on a CRT.

Attached is dmesg from 2.6.35 with "drm.debug=15" boot parameter.

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