Ubuntu 17.10 Gnome/Xorg Lenovo 4th gen X1 20FBxxx Skylake i7 Intel built-in video Kernel 4.13.0-32-generic #35-Ubuntu SMP
When connecting Thinkpad Dock with 2 Dell monitors, screen locks up (mouse is moving though) and is not responding. Monitors are not recognized. Unlocks 20 sec after disconnect. Happens every time after first connection following a reboot (first connection after reboot is OK) dmesg shows a lot of: drm:intel_wait_ddi_buf_idle [i915_bpo]] *ERROR* ... Workaround: sudo vi /usr/share/X11/xorg.conf.d/20-intel.conf paste: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "DRI" "3" EndSection reboot The issue does not return, unless the above file it removed. Hat tip to https://wiki.archlinux.org/index.php/intel_graphics#Skylake_support -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1552040 Title: Laptop sometimes doesn't detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1552040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs