Vladimír Kriška, thank you for reporting this and helping make Ubuntu better. Could you please run the following command in the development release from a Terminal as it will automatically gather and attach updated debug information to this report:
apport-collect -p xorg 1427221 Please ensure you have xdiagnose installed, and that you click the Yes button for attaching additional debugging information. ** Package changed: xserver-xorg-video-intel (Ubuntu) => xorg (Ubuntu) ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1427221 Title: i915, broadwell, cannot connect external monitor through Display Port Status in xorg package in Ubuntu: Incomplete Bug description: Hi, on new laptop (thinkpad t450s) I get error message after connecting external monitor: [drm:intel_dp_complete_link_train [i915]] *ERROR* failed to train DP, aborting And after that, monitor is turned to sleep mode. Interesting thing is, that monitor is detected. I've already reported bug to kernel intel-gfx, so some additional informations can be found there: https://bugzilla.kernel.org/show_bug.cgi?id=94121 ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.2 Uname: Linux 3.19.0-031900-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.2 Architecture: amd64 CurrentDesktop: XFCE Date: Mon Mar 2 14:17:36 2015 InstallationDate: Installed on 2015-02-26 (3 days ago) InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1427221/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp