[Bug 91446] New: Unable to disable and enable outputs on the same command line with xrandr

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91446

            Bug ID: 91446
           Summary: Unable to disable and enable outputs on the same
                    command line with xrandr
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: bernat at luffy.cx
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117333
  --> https://bugs.freedesktop.org/attachment.cgi?id=117333&action=edit
xrandr --verbose output

Hey!

When I dock my laptop, I would like to switch to the external screens with the
following command:

xrandr --output eDP1 --off --output DP2-1 --auto --primary \
       --output DP2-2 --auto --right-of DP2-1 --dpi 96

Unfortunately, I get:

xrandr: Configure crtc 1 failed

There is no problem if I use two steps:

xrandr --output eDP1 --off --output DP2-1 --auto --primary
xrandr --output DP2-2 --auto --right-of DP2-1 --dpi 96

But it sometimes confuse my window manager (two reconfigure events in a very
short time).

Another oddity is that I have enough CRTC to get the three screens running.
When not turning off eDP1, everything works as expected.

X.org 7.7 from Debian Sid.
Intel driver 2.99.917.

The laptop is a Lenovo Carbon X1 and the external screens are plugged through a
dock using MST.

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