radeon 9000 (rv250) dvi 1920x1200 troubles

[Andre Puschmann]

Alex Deucher wrote:
> On Tue, May 13, 2008 at 11:08 AM, Andre Puschmann
> <andre.puschmann at stud.tu-ilmenau.de> wrote:
>> Alex Deucher wrote:
>>  > (II) RADEON(0): Modeline "1920x1200"x60.0  154.00  1920 1968 2000 2080
>>  > 1200 1203 1209 1235 -hsync +vsync (74.0 kHz)
>>  >
>>  > the problem is you are using xserver 1.3 which had a bug when parsing
>>  > sync polarity from edid.  the sync polarities are reversed and many
>>  > LCDs don't like that.  try the following modeline:
>>  > Modeline "1920x1200R"  154.00  1920 1968 2000 2080  1200 1203 1209
>>  > 1235 +hsync -vsync
>>  >
>>  > xrandr --newmode "1920x1200R"  154.00  1920 1968 2000 2080  1200 1203
>>  > 1209 1235 +hsync -vsync
>>  > xrandr --addmode DVI-0 "1920x1200R"
>>  > xrandr --output DVI-0 --mode "1920x1200R"
>>  >
>>  > Check to see if your distro provides a patch to fix that or upgrade to
>>  > a newer xserver.
>>  >
>>  > Alex
>>
>>  Thanks for your prompt reply.
>>  Unfortunately this doesn't work either. I already tried this settings as
>>  this was one of the modelines I found with google.
>>
>>  I also tried the newest Ubuntu Live-CD with the same results (xserver
>>  1.4). But I will check again, if this version auto-detects the edid
>>  values correctly.
>>
>>  And even worse, my monitor doesn't provide any error output. I just
>>  stays black.
>>
>>  Maybe this problem is really because my video card can't provide the
>>  right signal?
>>  Is there anybody out there who runs a radeon 9000 with a resolution of
>>  1920x1200px?
> 
> Can you try the VGA port rather than the DVI port?

Sure,

the VGA port works with the above settings.
But in my opinion the signal isn't very good, it looks a bit blurry.

Maybe that helps to isolate the problem.


Best regards,
	Andre