<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [dp mst] External displays remain blank with linux-3.18.6 after resuming from suspend" href="https://bugs.freedesktop.org/show_bug.cgi?id=89589#c16">Comment # 16</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [dp mst] External displays remain blank with linux-3.18.6 after resuming from suspend" href="https://bugs.freedesktop.org/show_bug.cgi?id=89589">bug 89589</a> from <a class="email" href="mailto:lakostis@altlinux.org" title="Konstantin A. Lepikhov <lakostis@altlinux.org>"> Konstantin A. Lepikhov</a> <pre>I'm having this issue too - it never worked for me, so guess it could be unrelated but still configuration is nearly the same: - GPU: Haswell - Laptop: DELL Latitude E5440 - MST dock from DELL - 2 DELL U2415 monitors attached via mDP (DP1.2 disabled) $ rpm -qa|fgrep xorg-x11-drv-intel xorg-x11-drv-intel-2.99.917-16.20150729.fc23.x86_64 $ rpm -qa|fgrep xorg-x11-server xorg-x11-server-common-1.18.0-0.4.20150907.fc23.x86_64 xorg-x11-server-Xorg-1.18.0-0.4.20150907.fc23.x86_64 xorg-x11-server-utils-7.7-16.fc23.x86_64 There are 2 monitors connected + eDP on laptop. When I boot the system everything works just fine, monitors are visible and configurable via xrandr. But if I suspend/resume the laptop, both monitors are in power save mode but xrandr still show that they are connected. If I try to switch them off/on one by one using xrandr but only one monitor start to work, another remain blank. Attaching dmesg with drm debug enabled after resume and after play with xrandr.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>