[Bug 18370] Monitor refresh rate not set correctly

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18370





--- Comment #7 from Tobias Rupf <trupf1 at gmx.de>  2008-11-07 02:21:29 PST ---
Thanks a lot, it is now working. I can not more use CTRL-ALT"+" and -"-" to
change resolution, but I can live with that. That point was, that I had to
comment out the Option "NoDDC" in the Device section for my driver. It seems
that this entry was blocking the EDID information from my monitor, but DDC was
used anyways. The EDID is now reported by xrandr. I did also delete the
HorizSync and VertRefresh entries and the Modelines completely (not required to
delete, but also not more necessary).

Still I don't understand, that the prefeered mode as shown by xrandr ist not
generally used after resolution changes, for example from a game, without the
EDID information. The preferred mode got only used at X startup. See below:

after x startup:
trupf at lisa:~$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1200
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x
0mm
   1280x1024      75.0*+   59.9
   1280x960       75.0     72.0
   1280x800       60.0
   1152x864       75.0     60.0     60.0
   1280x768       60.0
   1024x768       75.1     60.0     59.9
   832x624        59.8
   800x600        72.2     75.0     60.3     59.9
   768x576        75.0     72.0     60.1
   640x480        75.0     76.6     75.0     76.6     63.1     59.9     59.4
   720x400        59.6
DVI-0 disconnected (normal left inverted right x axis y axis)

after running a game:
trupf at lisa:~$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1200
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x
0mm
   1280x1024      75.0 +   59.9*
   1280x960       75.0     72.0
   1280x800       60.0
   1152x864       75.0     60.0     60.0
   1280x768       60.0
   1024x768       75.1     60.0     59.9
   832x624        59.8
   800x600        72.2     75.0     60.3     59.9
   768x576        75.0     72.0     60.1
   640x480        75.0     76.6     75.0     76.6     63.1     59.9     59.4
   720x400        59.6
DVI-0 disconnected (normal left inverted right x axis y axis)

I think, this should be fixed and I would also suggest to implement a way to
turn of DDC completely.

But thanks again, for me it is working now, with EDID supplied through the
driver, the preferred mode is correctly selected after running a game too and i
also got rid of the flickering.


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