could use help debugging black screen on RS780 (xf86-video-ati-6.13.0, radeon)

[Larry Doolittle]

Alex -

Thanks for taking the time to answer!

On Tue, Jun 01, 2010 at 08:46:56PM -0400, Alex Deucher wrote:
> >> On Mon, May 31, 2010 at 09:52:37PM -0700, Larry Doolittle wrote:
> >> > ... screens go black when I start the X server.
> 
> You might try using the old PLL code:
> Option "NewPLL" "False"
> in the device section of your config.

Doesn't help.

> Do any modes besides 2048x1152 work?

No.

> It's probably also worth trying kms.

It might take me a while to exercise that possibility.
I see decent-looking instructions at
  http://www.ott.net/knowledge/radeon-kms-on-debian-testing/
but the stock squeeze kernel doesn't have CONFIG_DRM_RADEON_KMS set.

I posted a copy of my Xorg.log.0 with "NewPLL" "False"
to http://doolittle.icarus.com/~larry/radeon-logfile.txt

The misspelled "success" in "Blank CRTC 0 succ3ss" is just
me proving to myself that I have my freshly built radeon_drv.so
in use, and that it's atombios_crtc.c:atombios_blank_crtc()
that claims to be doing the blanking and unblanking.

   - Larry