[Bug 72418] New: intel-virtual-output: exits w/o error, doesn't seem to do anything

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72418

          Priority: medium
            Bug ID: 72418
          Assignee: chris at chris-wilson.co.uk
           Summary: intel-virtual-output: exits w/o error, doesn't seem to
                    do anything
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: tom at recursivedream.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Forgive me if this isn't really a bug; I've been trying very hard to understand
how `intel-virtual-output` should work/be used and I've yet to successfully
make it do anything.

Here's my process:

1. Start X
2. Ensure `xrandr --listproviders` contains both my video cards
3. Connect external monitor to dock (hardwired to the discrete GPU)
4. Call `intel-virtual-output`

At this point, the command simply exits without any output. I have tried
specifying the "source display" argument as :0 (or whatever my X display
happens to be); the command doesn't exit, but doesn't appear to do anything
else either. If I enable the VIRTUAL1 display, I just get an extended desktop I
can't access and the external monitor remains dark.

I am probably just using the tool incorrectly but since Google provided no
usage instructions and the manpage is rather spartan, I figured I'd give this a
shot.

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