ATI 6.7.192 Dual-Head DVI

[Alex Deucher]

On 9/21/07, Rick <palabra_up at yahoo.com> wrote:
> I just upgraded to X7.3.  Since FBMERGED no longer
> works I am trying to get my dual head Radeon X600 card
> to display on both monitors again. I have already
> setup the 6.7.192 ATI driver. My second monitor DVI-0
> is just displaying a black screen. I have a green
> light so X is picking it up. (Prior to upgrading the
> ATI driver my 2nd monitor would not even display, it
> was yellow).
>
> xrandr -q
> Screen 0: minimum 320 x 200, current 1280 x 1024,
> maximum 1280 x 1200
> DVI-1 connected 1280x1024+0+0 (normal left inverted
> right x axis y axis) 376mm x 301mm
>    1280x1024      60.0*+   75.0     59.9
>    1152x864       74.8
>    1024x768       75.1     60.0
>    800x600        75.0     60.3
>    640x480        75.0     60.0
>    720x400        70.1
> DVI-0 connected 1024x768+0+0 (normal left inverted
> right x axis y axis) 376mm x 301mm
>    1280x1024      60.0 +   75.0     59.9
>    1152x864       74.8
>    1024x768       75.1*    60.0
>    800x600        75.0     60.3
>    640x480        75.0     60.0
>    720x400        70.1
>
> xrandr --output DVI-0 --right-of DVI-1
> xrandr: screen cannot be larger than 1280x1200
> (desired size 2304x1024)
>
> How can I resolve this?

For dual DVI cards you'll need to use the most recent driver from ati
git master.  For the desktop size, add a virtual line to the screen
section of your config specifying the max desktop size you want,
e.g.,:
Virtual 2304 1024

Alex