[Bug 13294] New: DVI-output is not enabled on powerbook

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=13294

           Summary: DVI-output is not enabled on powerbook
           Product: xorg
           Version: 7.3
          Platform: PowerPC
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: wouter at telox.net
         QAContact: xorg-team at lists.x.org


XRandr is perfectly capable of detecting an external DVI display on my
PowerBook 5,4 (with ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]).
When I enable the external display, for example using:

xrandr --output DVI-0 --mode 1280x1024

everything goes okay, except for the fact that the display doesn't get a
signal. This can be remedied by executing some bit-banging:

radeontool regset FP_GEN_CNTL $((0x00034148 & ~0x0c07 | 0x0405))

Then the display is enabled, however since the driver is unaware of this hack I
have to execute it again after switching to the console or suspending. In
addition to this, the display keeps getting a signal, so it won't enter a
powersave mode.

I've tested this on Debian Sid, with Xorg version 1:7.3-6 and
xserver-xorg-video-ati version 1:6.7.196-1 from experimental (this should be
almost up to date with git at the time of writing).

I'd be happy to provide any additional information.

P.S. My laptop is correctly detected as a duallink powerbook, I will attach the
config shortly.


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