[Nouveau] [Bug 35901] two full hd displays (left and right) with nouveau does not work any more

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35901

--- Comment #12 from Greg Turner <gmturner007 at ameritech.net> 2011-04-25 14:20:23 PDT ---
Some observations about this bug which may or may not be helpful.  I messed
around with xrandr to see exactly what would and wouldn't trigger the problem.

If I slightly overlay my second display onto the first one's viewport, then the
problem vanishes.  Turns out that if I have 16 or more pixels of horizontal
overlap, the bug does not occur, but once the right-hand display comes within
16 pixels of a standard --right-of arrangement, the bug occurs.

Finally, I found that the bug only occurs at 24bpp.

Also, I found a pseudo-workaround.  It's pretty horrible though.  If I do:

  $ xrandr --output DVI-I-1 --scale 1x1.0001
  $ xrandr --output DVI-I-2 --scale 1x1.0001

which is just enough to add one vertical pixel to the screen dimensions, then I
get a result which very closely approximates a working setup.  Obviously this
is a terrible kludge and really no solution at all but it was good enough to
get me up and running.

HTH,

-gmt

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