<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Screen is frozen on second connection of DP MST dock" href="https://bugs.freedesktop.org/show_bug.cgi?id=107546#c28">Comment # 28</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Screen is frozen on second connection of DP MST dock" href="https://bugs.freedesktop.org/show_bug.cgi?id=107546">bug 107546</a> from <a class="email" href="mailto:benjamin@sipsolutions.net" title="Benjamin Berg <benjamin@sipsolutions.net>"> Benjamin Berg</a> <pre>Created <a href="attachment.cgi?id=142103" name="attach_142103" title="Hang when turning 3rd monitor on">attachment 142103</a> <a href="attachment.cgi?id=142103&action=edit" title="Hang when turning 3rd monitor on">[details]</a> Hang when turning 3rd monitor on OK, I tried drm-tip (9ef57c71386778d8425b4884252f1919184645a1). Configuration: * X1 Carbon 4th Gen * Onelink+ Dock (yeah, same as the reporter it seems, maybe this dock is "special" in some way …) * Three monitors: - Internal screen, 1920x1080 - DELL U2515H (right now DP 1.2/MST enabled), attached to dock, 2560x1440 - DELL P2417H, attached to dock, 1920x1080 When I boot with everything connected: * Internal screen works * Graphics errors on P2417H * U2515H remains off (but laptop thinks it is used) The attached log file is when booting with the P2417H disabled. I logged in and then switched the P2417H off, which resulted in my laptop to freeze after a short time. I did not manage to recover, but I did try to switch the U2515H off/on a few times and then unplugged the dock.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>