[Bug 18554] New: Red flicker with radeon driver (Radeon 9000 Pro AGP) and DVI on PowerMac G4

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18554

           Summary: Red flicker with radeon driver (Radeon 9000 Pro AGP) and
                    DVI on PowerMac G4
           Product: xorg
           Version: 7.4
          Platform: PowerPC
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: linuxuser330250 at gmx.net
         QAContact: xorg-team at lists.x.org


Created an attachment (id=20340)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=20340)
xorg.conf

The hardware:
Apple Power Mac G4 MDD (PowerMac3,6) - see http://support.apple.com/kb/SP63 -
mine is the Dual 1 GHz model.

The software:
Gentoo Linux 2008.0 (started about 1 year ago with 2007.1)
Kernel 2.6.27 (started with 2.6.22)
X.org 7.4 (started with 7.2)
radeon driver: x11-drivers/xf86-video-ati-6.9.0 (started with 6.7.197, 6.8.0)

When there was no problem:
The Radeon 9000 Pro AGP 4x has a DVI output connector and an ADC (Apple Display
Connector). It originally shipped with a DVI-to-VGA adaptor.
The output was okay with this DVI-to-VGA adaptor and a CRT monitor.

THE PROBLEM:
I then bought a TFT monitor -
http://www.fujitsu-siemens.com/home/products/displays/tft/scaleoview_h22-1w.html
I connected it directly via DVI.
I wasn't able to get a screen upon initialization without red flicker since.

Symptoms:
*) red flickering after first X initialization.
*) red flickering is gone when changing the screen resoltion.
e.g. "xrandr -s 1280x1024" and then "xrandr -s 1680x1050" (panel resolution)
fixes the red flickering; same with Ctrl-Alt-+ and Crtl-Alt--
*) I today discovered that setting Option "ReducedBlanking" in 
the /etc/X11/xorg.conf Monitor Section resolved the red flickering on first 
initialization.
*) the red flickering _always_ reappears after console switching (when 
returning to the X console).


Others with the same problem:
davidgurvich: http://forums.gentoo.org/viewtopic-p-5282763.html
Giuliano: http://lists.freedesktop.org/archives/xorg/2007-January/020641.html


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.