On Thu, 14 Jan 2016, Derek Yerger <dy@xxxxxxxxxx> wrote: > Kind Regards, > Derek Yerger > Computer Engineering > 10171358 / djy24 > [1.] displayport MST external monitors don't return from sleep mode > > [2.] When displays go to sleep, upon return from sleep the two monitors > attached to a belkin mini displayport to 2x HDMI, do not return from > sleep. This results in part of the desktop being inaccessible, until the > external displays are unplugged, and then plugged back in. > > Sometimes, Xorg will also back down to one monitor. The data > accompanying this report is for an instance where the power save mode > caused Xorg to drop to the primary monitor only. > > This is on a Dell XPS 13 (9333) using intel i915. There are two external > monitors connected by HDMI to a DP-MST adapter which connects to the > single mini-displayport. A single-HDMI-to-mini-displayport adapter works > as expected (coming out of power save). > > The bug can be reproduced by either letting the screen power save > timeout elapse, or by running "xset dpms force off" Please report i915 bugs at the freedesktop.org bugzilla: https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel But before doing so, please check if your issue might be one of these existing DP MST bugs: https://goo.gl/VERzzh BR, Jani. -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
