<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [KBL] Could not switch the monitor configuration" href="https://bugs.freedesktop.org/show_bug.cgi?id=101463#c11">Comment # 11</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [KBL] Could not switch the monitor configuration" href="https://bugs.freedesktop.org/show_bug.cgi?id=101463">bug 101463</a> from <a class="email" href="mailto:dhinakaran.pandiyan@intel.com" title="Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>"> Dhinakaran Pandiyan</a> <pre>(In reply to Ethan Hsieh from <a href="show_bug.cgi?id=101463#c0">comment #0</a>) > Created <a href="attachment.cgi?id=131995" name="attach_131995" title="kernel log and Xorg.0.log">attachment 131995</a> <a href="attachment.cgi?id=131995&action=edit" title="kernel log and Xorg.0.log">[details]</a> > kernel log and Xorg.0.log > > Could not switch the monitor configuration > > Reproduction steps: > 1. Two external monitors with DP/mDP cable connected to Dell Dock. > All three displays: Built-in LCD, DP and mDP monitor > 2. Boot to Ubuntu Desktop > 3. See three displays (extend mode) > 4. Unplug the DP cable from dock > 5. Go to [Ubuntu] => [All Settings] => [Displays], > Press "Detect Displays" every second until [Displays] shows correct amount > of Display > 6. Unplug the mDP cable from dock > 7. do 5 again > 8. Plug the mDP cable back into dock > 9. do 5 again > 10. Plug the DP cable back into dock > 11. do 5 again > 12. Got to 4. > > Additional information: > 1. Kernel: 4.10.0-21 x86_64 > Kernel: 4.12.0-994-generic x86_64 > 2. Linux distribution: Ubuntu 16.04.2 LTS > 3. Laptop: Dell Precision 5520 > 4. Dell Business Thunderbolt Dock - TB16 > <a href="https://goo.gl/vFDjpi">https://goo.gl/vFDjpi</a> > 5. X.0.org: > a) log/1/Xorg.0.log: (drm.debug=0xe and xserver-xorg-video-intel > --enable-debug=full) > [126.895]KMSG: [drm:drm_atomic_helper_check_modeset [drm_kms_helper]] No > suitable encoder found for [CONNECTOR:74:DP-5] > [126.896](EE) intel(0): failed to set mode: Bad file descriptor [9] > b) log/2/Xorg.0.log (drm.debug=0xe) > [730.060] (EE) intel(0): failed to set mode: Invalid argument [22] > > How to recover: > Press the "Close" button in the pop-up window "Could not switch the monitor > configuration". > PS: It's not easy to press the button because all windows have wrong > proportion. (log/The_pop-up_window_and_wrong_proportion.png) Hi Ethan, I see that both kernel logs you have attached are for kernel: [ 0.000000] Linux version 4.10.0-21-generic kernel: [ 0.000000] Linux version 4.10.0-21-generic Please retest with Ubuntu 17.04 and latest drm-tip. -DK</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> </ul> </body> </html>