[Bug 90043] New: [BDW DP MST] MST mode not working with 4K monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90043

            Bug ID: 90043
           Summary: [BDW DP MST] MST mode not working with 4K monitor
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: hawara at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 115096
  --> https://bugs.freedesktop.org/attachment.cgi?id=115096&action=edit
xrandr --verbose

I have a ThinkPad T550 with Philips Brilliance 288P monitor, connected to mini
displayport.

I'm trying to use 3840x2160 mode at 60hz refresh, which should work through
MST.
But i'm not getting any DP1-1 DP1-2 devices for MST virtual display panels.

I'm running archlinux with 4.0.0-rc7-drm_intel_nightly_20150411 kernel (i've
tried   3.19.3-3-ARCH, and 4.0.0-1 mainline kernel)
xf86-video-intel-git 2.99.917.265.g37ce4dd-1
libdrm-git 2.4.60.31.g6f90b77-1

I'm attaching xrandr --verbose output and dmesg with drm.debug after doing
xrandr --output DP1 --off to motivate monitor to switch to MST mode.
DisplayPort 1.2 in monitor properties is enabled.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20150415/82b891e4/attachment.html>