John Morris, thank you for reporting this and helping make Ubuntu better. Could you please run the following command once from a terminal as it will automatically gather and attach updated debug information to this report: apport-collect -p xorg 1535447
Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information. When reporting xorg related bugs in the future, please do so via the above method. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs. ** 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/1535447 Title: Intel Graphics 4K Screen Tearing Status in xorg package in Ubuntu: Incomplete Bug description: On a fresh boot all works well, but after an indeterminate amount of time the screen starts tearing badly, most noticeably as a permanent vertical tear. Once this tearing starts, it affects everything (desktop, etc) but is mostly visible in videos. The only way to get rid of the tear is to reboot. I do not know where this tearing is occurring, compositor? graphics driver? Hardware, Intel NUC5i5RYK (integrated graphics), LG 31MU97 DCI 4K monitor (4096x2160). Using a Mini DisplayPort to HDMI cable between the NUC and monitor. 00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) Software, Kubuntu 15.04 I also see the same problem in 15.10, but the computer I took the video of has 15.04 installed. The screen resolution is set to 4096x2160. In my syslog, I also see tons of these error messages (I dont know if they are related to the tearing). The error message repeats multiple times, and then stops. [ 668.879288] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! I am hoping I can attach a video to this file which shows the tearing (5.7MB) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1535447/+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