Latest intel driver breaks 1680x1050 mode on TMDS-1 output

[Stefan Dirsch]

Hi

Latest intel driver breaks 1680x1050 mode on TMDS-1 output only (works
fine when using VGA output). Monitor gets 1680x1053 instead and breaks
the picture by scaling in y direction. I bisected the driver to figure
out which commit changed the behaviour:

> git bisect good
1e2e301348b4168aeed38b3fdc6b0e43d5678a86 is first bad commit
commit 1e2e301348b4168aeed38b3fdc6b0e43d5678a86
Author: Keith Packard <keithp at dulcimer.keithp.com>
Date:   Sat Jun 30 12:45:24 2007 -0700

    Fix load detection to use border region instead of blanking.

    Make sure there is some border area to use by changing how the pipe is
    configured, then pick a scanline in the middle of the border for load
    detection. This lets the load detect code use an active pipe instead of
    requiring an idle one.

I've added Bug #11663 for this issue, where I also attached
logfile(s).

Best regard,
Stefan

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