Dual link on X1250 radeonhd git head fails
alexdeucher at gmail.com
Thu Mar 20 07:05:39 PDT 2008
On Thu, Mar 20, 2008 at 2:51 AM, Adam J. Richter <adam at yggdrasil.com> wrote:
> On Mon, Mar 17, 2008 at 02:42:40PM +0100, Matthias Hopf wrote:
> > Current git of radeonhd should support dual link DVI as well, though
> > this is untested ATM.
> I just tried the radeonhd git head (pulled minutes ago) on a
> 30 inch 2560x1600 HP lp3065 monitor, and the screen is black with the
> green LED flashing. This same screen displays BIOS messages, lilo
> text and the character mode linux console fine, as I think there is
> some built in video stretching done in character mode (for example, in
> character mode, my 1920x1200 monitor always claims to be receiving a
> 1920x1200 signal rather than 640x480 or something similar that one
> would normally associate with character mode). xrandr, correctly
> describes the video modes for my 1920x1200 monitor on the VGA cable
> and the 2560x1600 monitor on VGA, and indicates that 2560x1600 is
> selected, and the virtual screen size is expanded to 2560x1600. So, I
> think this is a mode setting issue and not some misconfiguration on my
> My new lp3065 can select between three dual-link DVI input
> cables, so I should be able to plug it into an nvidia card for now to
> use it immediately while still being available to test new changes
> through a cable connect to my AMD motherboard. So, if anyone wants me
> to try a patch and report results, I am happy to do so when I have time.
> Also, if anyone would like to point me to the relevant page
> numbers of the recently released X docs for the rs690 in
> http://www.x.org/docs/AMD/ for enabling dual link, I may be able to
> try to work on this myself during the weekend. I had previously
> skimmed AMD's recently released documents but didn't immediately find
> a bit to set to activate dual link.
Have you tried radeon? Also, your board may not support dual-link.
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