Bug#481361: xserver-xorg-video-ati: No display on DVI output

[Alex Deucher]

On Mon, Dec 15, 2008 at 10:06 AM, Francois Gouget <fgouget at free.fr> wrote:
>
> First, as I said in a previous email (which I can't find now), this
> problem is still present in xserver-xorg-video-ati 1:6.9.0-1+lenny4.
>
> Fortunately, after some searching, I found the Git repository for my
> driver. It would be nice if this information was available in the
> xserver-xorg-video-ati package (after all we're open-source so why not
> make it easy for the user to find the authoritative source of the code).
>
> From there I could do a git-bisect which pointed me to this patch as the
> culprit:
>
> 547543bbefe605a453bfa5ae6d063ae02c5f040e is first bad commit
> commit 547543bbefe605a453bfa5ae6d063ae02c5f040e
> Author: Alex Deucher <alexdeucher at gmail.com>
> Date:   Sat Sep 23 08:21:59 2006 +1000
>
>    radeon: re-organise FP and CRTC register setting routines
>
> :040000 040000 0ac88422caf387f6cfda4214713d62f342ffb2ff 089cf7f3e18f90d4d5595a78f61c41564ec2f60b M      src
>
>
> Unfortunately it is somewhat long and cannot cleanly be reverted in the
> current tip. But hopefully it will point the way to the fix.

Thanks for tracking this down.  Unforunately, the code has changed
significantly since then and it's not clear to me how that would have
affected your card.  Any chance you could send me some reg dumps
between a working system and the non-working system?  if you could
download radeontool from here:
http://cgit.freedesktop.org/~airlied/radeontool
and then run (as root) in a working setup:
./radeontool regmatch '*' > working.dump
and a non-working setup:
./radeontool regmatch '*' > broken.dump
and send me the outputs, I can sort out what's wrong.

Alex