TV Out on radeon 7500

Alex Deucher alexdeucher at
Sat Oct 13 15:53:45 PDT 2007

On 10/13/07, nikosapi <nikosapi at> wrote:
> Hello,
> I just got an old pci radeon 7500 card for its TV output capabilities (I'm
> using two of the outputs on my nvidia card already).
> I've upgraded to Ubuntu Gutsy and I've also gotten the latest radeon drivers
> and xrandr from git. I got information on how to do this from:
> Using xrandr I am able to issue the following commands which makes the blue
> screen on my tv very jittery (I assume it's because the card is feeding the
> TV a bad signal):
> xrandr --addmode S-video 800x600
> xrandr --output S-video --mode 800x600
> Then if I try to set the output to ntsc (xrandr --output S-video --set
> tv_standard ntsc) I get the following error:
> X Error of failed request:  BadValue (integer parameter out of range for
> operation)
>   Major opcode of failed request:  159 (RANDR)
>   Minor opcode of failed request:  13 ()
>   Value in failed request:  0x1b9
>   Serial number of failed request:  20
>   Current serial number in output stream:  21
> Although if I do: xrandr --output S-video --set tv_standard pal I get no error
> message. Does this mean that it doesn't support ntsc? The only
> other 'tv_standard' that I found that doesn't give me an error is 'default'
> which produces an even more violent jitter on the screen.

According to your bios, you chip only supports PAL:
(II) RADEON(1): Default TV standard: PAL
(II) RADEON(1): TV standards supported by chip: PAL

Right now I only add the standards that the bios lists.  It's trivial
to add them all though.  they should all work in theory, but YMMV.


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