[Bug 90211] New: intel-virtual-output fails with 'fatal IO Error 11'

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90211

            Bug ID: 90211
           Summary: intel-virtual-output fails with 'fatal IO Error 11'
           Product: xorg
           Version: 7.7 (2012.06)
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: c at neopostmodern.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 115393
  --> https://bugs.freedesktop.org/attachment.cgi?id=115393&action=edit
xorg.conf.nvidia (Xorg configuration used with bumblebee)

I am running Ubuntu 15.04 with 3.16 Kernel on a Thinkpad W530 with a NVIDIA
Corporation GK107GLM [Quadro K1000M] using the nvidia-340 driver and the
xorg-edgers PPA
(https://launchpad.net/~xorg-edgers/+archive/ubuntu/ppa?field.series_filter=vivid).
asds
I used to be able to run a triple head setup with 14.10, following these
instructions
(www.unixreich.com/blog/2013/linux-nvidia-optimus-on-thinkpad-w520w530-with-external-monitor-finally-solved/)
that include building the `intel-virtual-output` utility from the
xorg/driver/xf86-video-intel git.

Then it stopped working
(http://askubuntu.com/questions/591343/intel-virtual-output-freezes).
Now I upgraded to 15.04, and I get the following error:

$ sudo modprobe bbswitch
$ optirun true
$ intel-virtual-output 
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 20 requests (20 known processed) with 0 events remaining.

After running `optirun true` my external monitor notices the incoming signal
(all black) and after several minutes I will even see a duplicate cursor. I can
start applications into the screens with a `DISPLAY=:8` prefix but displays are
not recognized in the settings menu.

The second X server is actually running:
$ ps ax | grep Xorg
 6964 ?        Ss     0:11 Xorg :8 -config /etc/bumblebee/xorg.conf.nvidia
-configdir /etc/bumblebee/xorg.conf.d -sharevts -nolisten tcp -noreset -verbose
3 -isolateDevice PCI:01:00:0 -modulepath
/usr/lib/nvidia-340/xorg,/usr/lib/xorg/modules

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