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

Ross Vandegrift ross at
Tue Jun 1 07:09:21 PDT 2010

On Mon, May 31, 2010 at 09:52:37PM -0700, Larry Doolittle wrote:
> I got an ATI 790GX motherboard (Biostar TA790GX XE) specifically
> to check out the "fully documented" ATI chipset capabilities.
> Using either Debian Squeeze (xserver-xorg-video-radeon, built
> from xf86-video-ati-6.12.6) or home-built binary built directly
> from xf86-video-ati-6.13.0, screens go black when I start the X
> server.  I can still change back to a text console, at least if
> I use the VGA port.  Using the DVI port, it seems the monitor
> gets confused and I need to cycle the computer and/or the monitor
> to recover.

I've recently been seeing this symptom as well.  Same Debian release,
ATI RS880 video.  Maybe 10% of the time, when returning from video
suspend, the screen contents come up for approximately a second and
then the monitor goes blank.  Switching to a text VT and back fixes
the issue.

Only seems to be triggered on startup and return from power saving

> Oh, one more tidbit: this is an amd64 installation.  The hardware is
> reported by the X server as an RS780 DDR2 200e/500m Chipset: "ATI
> Radeon HD 3300 Graphics" (ChipID = 0x9614)

I'm running i686, not x64, Radeon HD 4200.


Ross Vandegrift
ross at

"If the fight gets hot, the songs get hotter.  If the going gets tough,
the songs get tougher."
	--Woody Guthrie
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