[Bug 103106] New: X freezes after disabling an screen using lxrandr

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103106

            Bug ID: 103106
           Summary: X freezes after disabling an screen using lxrandr
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: pablo.doramas at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 134678
  --> https://bugs.freedesktop.org/attachment.cgi?id=134678&action=edit
files to help debuging the issue

Issue reproducess 100% of the time since a couple of weeks, but didn't find the
error until now. I have one monitor connected with DisplayPort (works fine),
but if I try to disable it using lxrandr, X crashes. Same scenario with a
different monitor using classic VGA cable. I have just found the crash in the
journal.
OS is archlinux on HP zbook 14.
[root at zbook-pds /]# uname -a
Linux zbook-pds 4.13.3-1-ARCH #1 SMP PREEMPT Thu Sep 21 20:33:16 CEST 2017
x86_64 GNU/Linux
Please find attached a .tar.gz file with the following files:
- GPU crash dump saved to /sys/class/drm/card0/error
- journal of the crashed session
- randr --verbose output

Do not hesitate to contact me for further details or want me to test anything.

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