[Bug 24523] New: Zaphod mode broken on Radeon 4670

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=24523

           Summary: Zaphod mode broken on Radeon 4670
           Product: xorg
           Version: 7.4
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: chewi at aura-online.co.uk
         QAContact: xorg-team at lists.x.org


Before I go on, it's worth mentioning that there seems to be confusion about
which DVI output on my card maps to which xrandr output. I've found that that I
have to insert them the opposite way to how I have them for fglrx before it
even starts making sense. The only way I can really tell for sure which output
has been assigned to which monitor is by checking the output of xrandr before
and after changing resolution. If I don't swap the outputs, xrandr assigns the
resolutions for my TV (such as 1920x1080) to my regular monitor (which can only
do 1280x1024) and vice-versa. This seems like a driver bug to me. It even
happens in non-Zaphod mode but since it's Zaphod mode I'm interested in and
since non-Zaphod mode still works in spite of this, I'm lumping this comment in
with my wider Zaphod mode issue.

The main scenario I'm trying is Zaphod mode with KMS and DRI enabled. My TV
(the secondary monitor) shows the GDM login but my regular monitor (the primary
monitor) gets no signal. The output from xrandr still shows both monitors as
connected but if I try to enable DVI-0, I get "cannot find crtc for output
DVI-0".

It might be worth noting that it shows nothing about the DIN output, yet it
appears as disconnected in the list when not in Zaphod mode.

What's also interesting is that I have to add a monitor section for DIN,
otherwise I get a message like "Output DIN using monitor section DVI-0", which
clearly isn't right. I don't have to do this in non-Zaphod mode though. In that
case, it says "Output DIN has no monitor section".

I tried disabling DRI with 'Option "DRI" "off"' but strangely it seemed to have
no effect. According to the log, DRI was enabled anyway. I then tried with KMS
disabled. The first time, the machine spontaneously restarted and the second
time, it just froze. :|

All this was tested with the git versions of mesa, libdrm, xf86-video-ati and
linux-next-20091013, which had the latest from drm-next that day.


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