<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Blank screen and dmesg errors with two external monitors" href="https://bugs.freedesktop.org/show_bug.cgi?id=93208#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Blank screen and dmesg errors with two external monitors" href="https://bugs.freedesktop.org/show_bug.cgi?id=93208">bug 93208</a> from <a class="email" href="mailto:bartolinidb@gmail.com" title="dbb <bartolinidb@gmail.com>"> dbb</a> <pre>I'm not sure if this symptom is related or if it's really another issue: When I have one external monitor attached via the miniDP port and I disconnect it, I get a black screen on the laptop and the only way to get it back is to go to a text console and restart X. I see the following in dmesg: [29129.390410] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [...] [29129.391716] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [29148.600973] kscreen_backend[1653]: segfault at 10 ip 00007eff025b68c0 sp 00007ffc47822df8 error 4 in KSC_XRandR.so[7eff025a3000+20000] [29149.332438] kactivitymanage[1630]: segfault at 18 ip 00007fa820132ee0 sp 00007ffc205b63a8 error 4 in libqxcb.so[7fa820104000+b5000] [29149.332859] kiod5[2181]: segfault at 18 ip 00007f58f0fcbee0 sp 00007ffee5450258 error 4 in libqxcb.so[7f58f0f9d000+b5000] [29149.402729] systemsettings5[19223]: segfault at 8 ip 00007fda31cf90e0 sp 00007fffac0143f8 error 4 in libQt5Gui.so.5.4.2[7fda31beb000+51b000] [29150.469080] kwin_x11[19305]: segfault at 18 ip 00007fc1d4e29e38 sp 00007ffe9043b720 error 4 in libqxcb.so[7fc1d4de0000+b5000] [29150.533715] krunner[19303]: segfault at 18 ip 00007ffba6bede38 sp 00007ffdf5735920 error 4 in libqxcb.so[7ffba6ba4000+b5000] [29150.534234] plasmashell[19301]: segfault at 18 ip 00007faa6eb0fe38 sp 00007ffed0685ed0 error 4 in libqxcb.so[7faa6eac6000+b5000] [29151.440292] klauncher[19322]: segfault at 18 ip 00007faab946be38 sp 00007ffe45ef0cc0 error 4 in libqxcb.so[7faab9422000+b5000] [29153.755640] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [...] [29153.789441] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [29153.789464] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training [29153.789988] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! [...] interrupt lied (SDE)! [29153.792093] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to start channel equalization</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>