ubuntu-x-swat team mailing list archive

[Daniel Manrique <daniel.manrique@xxxxxxxxxxxxx>]

Oops, sorry, you're right about the hotkey, I'm repeating the test with
xrandr this time.

I'm running the same experimental kernel:

http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next-
proposed/current/linux-
image-2.6.39-994-generic_2.6.39-994.201104200727_amd64.deb

On booting I see the following references to the "GMBUS timed out,
falling back to bit banging" message:

[   14.327182] [drm] GMBUS timed out, falling back to bit banging on pin 3 [i915 gmbus panel]
[   15.375376] [drm] GMBUS timed out, falling back to bit banging on pin 4 [i915 gmbus dpc]

I then tailed both /var/log/syslog and /var/log/Xorg.0.log, then plugged
in the external display (no key presses, no xrandr yet). Here's what
happens right when I plug it in (you're right, the GMBUS message appears
right when I plug the external display):

==> /var/log/syslog <==
Apr 27 15:14:49 201002-5345 kernel: [  530.567145] [drm] GMBUS timed out, falling back to bit banging on pin 2 [i915 gmbus vga]

==> /var/log/Xorg.0.log <==
[   531.748] (II) intel(0): Allocated new frame buffer 3072x1050 stride 12288, tiled

I produced a dmesg file with this experimental kernel and the xdiagnose
settings as described on #6. I do see some events when plugging in the
external display and also when running xrandr --auto:

- Plugged in the external at [   96.419325]
- xrandr --auto at [  198.077408]

I'm attaching this new dmesg file as it might provide some information.
Still, the problem persists and the external display shows nothing, even
though it's being detected and used (terminal windows still appear in
the external monitor, for instance, and I have to move them to the
built-in to be able to use them).


** Attachment added: "dmesg with the drm-intel-next kernel and drm.debug=0xe"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/754799/+attachment/2092045/+files/dmesg-5345.txt

** Changed in: xserver-xorg-video-intel (Ubuntu Oneiric)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/754799

Title:
  [arrandale] external VGA output doesn't output anything (i686)