radeon 9000 (rv250) dvi 1920x1200 troubles

[Andre Puschmann]

Hey guys,

I just solved my problems! Well, at least the ones regarding my new tft ;-)
Ok, here is what I did: i mounted my old hdd and installed windows xp
(shame on me :-) It worked out of the box with the radeon drivers from
Dell. The app reported 60Hz refresh-rate. However, the monitor OSD only
showed 50Hz. I than tried to create a modeline with cvt for 50hz. But
that one didn't work. But using the reduced blanking mode (-r) it does.

This is the modeline:

$ ./cvt 1920 1200 50 -r

  # 1920x1200 @ 50.00 Hz Reduced Blank (CVT)
  #   field rate 49.97 Hz; hsync: 61.42 kHz; pclk: 127.75 MHz
  Modeline "1920x1200_50.00_rb"  127.75  1920 1968 2000 2080  1200 1203
1209 1229  +HSync -Vsync

Maybe this is useful for somebody else.

Thanks Alex + Felix for your help.

Best regards,
	Andre




Andre Puschmann wrote:
> Alex Deucher wrote:
>> 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
> 
> Hey Alex,
> 
> no, it's a Dell Latitude D600.
> The suggested option doesn't work either.
> In ubuntu 7.10 this option is not documented (i.e. "man radeon" shows
> nothing) but the xorg log shows no "unsupported option" so i guess it is
> implemented.
> In Ubuntu 8.04 this switch is documented but it also doesn't work (I
> mean it doesn't solve the problem :-).
> 
> I am not sure if this is driver/settings related problem or a hardware
> one?! What else can I try? Install Windows?
> 
> Thanks very much
> 
> Best regards,
> 	Andre