radeon 9000 (rv250) dvi 1920x1200 troubles
Alex Deucher
alexdeucher at gmail.com
Tue May 13 09:36:29 PDT 2008
On Tue, May 13, 2008 at 12:33 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Tue, May 13, 2008 at 12:26 PM, Andre Puschmann
>
>
> <andre.puschmann at stud.tu-ilmenau.de> wrote:
> > 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.
>
> Perhaps the monitor doesn't like the bios provided TMDS PLL, does this
> option help (assuming your driver is new enough):
> Option "DefaultTMDSPLL" "TRUE"
Another possibility is that if this is a thinkpad, IBM only rates the
DVI port up to 1600x1200.
Alex
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