Comment 26 for bug 292421

Created an attachment (id=23546)
Xorg.1.log from booting 8.10 (-ati 6.9.x) - failed

Forwarding this bug from a Ubuntu reporter:
https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/292421

[Problem]
Black screen on X boot.

Problem is a regression that first started in Intrepid with the 6.9.x driver, and is still seen on 6.10.0 and 6.11.0.

At times, attempting an fglrx boot (which fails), and then booting -ati will make it work (log attached), but just for one boot. Included will be logs and register dumps from this case, to compare with the plain vanilla boot.

Also attempted clean boots with no fglrx bits installed, but same behavior was seen.

[lspci]
00:00.0 Host bridge: Intel Corporation 82975X Memory Controller Hub (rev c0)
05:00.0 VGA compatible controller: ATI Technologies Inc RV530LE [Radeon X1600/X1650 PRO]

[Original Report]
After updating to 8.10 the Xserver wasn't unable to display anything (putting my monitor into sleep mode).

The Xorg logs don't show anything strange.

I have noted the following differences when it not works:
Output 68 disable success
Blank CRTC 0 success
Disable CRTC 0 success
Blank CRTC 1 success
Disable CRTC 1 success
(II) RADEON(0): RADEONRestoreMemMapRegisters() :
(II) RADEON(0): MC_FB_LOCATION : 0xdfffd000 0xdfffd000
(II) RADEON(0): MC_AGP_LOCATION : 0x00000000
(II) RADEON(0): avivo_restore !
Enable CRTC 1 success
Unblank CRTC 1 success
Enable CRTC 0 success
Unblank CRTC 0 success

May it be that the Enable and Unblanl don't work properly on the driver thus making that nothing can be seen on the screen?