[Bug 97638] New: [SKL] [i915] External monitor does not wake up but laptop screen does (USB-C -> DisplayPort)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97638

            Bug ID: 97638
           Summary: [SKL] [i915] External monitor does not wake up but
                    laptop screen does (USB-C -> DisplayPort)
           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: victor.trac at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 126304
  --> https://bugs.freedesktop.org/attachment.cgi?id=126304&action=edit
dmesg

-- system architecture: x86_64
-- kernel version: ("uname -r"). 4.8.0-1-drm-intel-nightly
-- Linux distribution: archlinux
-- Machine or mother board model: Dell XPS 13 9350
-- Display connector: usb-c -> kensington sd4600p -> displayport -> dell P2715q

Problem:
My laptop turns off displays (both internal and external) after 10 minutes.
When I move the mouse or keyboard, the laptop display turns on as expected, but
the external monitor stays in sleep mode. Based on what's displaying on my
laptop's screen, I can tell that GDM is showing the login window on what it
thinks is the external monitor. I can get the external monitor to work at this
point by power cycling the Dell P2715Q, which causes it to detect the DP Input.
At this point everything works fine until the next time the laptop turns off
the displays.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160908/af0f9ed9/attachment.html>