I didn't think that Ubuntu's SimpleScreenRecorder would record the corruption but it records it just fine:
Here's an HD video of the screen corruption: https://www.youtube.com/watch?v=6dG_awbM5oo -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1808626 Title: Triple buffer flickering and weird display updating Status in xserver-xorg-video-intel package in Ubuntu: New Bug description: I've got a dual display setup, with one monitor rotated and I've been running into some weird bugs. The screen will not update properly at times and there will be areas that will intermittently flicker and show old areas that should have been overdrawn. Once it starts doing this, the only way to get things back to normal is to reboot. Going into standby and coming out of standby won't fix it. Actually, sometimes coming out of standby the screen won't refresh properly and I'll see the whole screen get some triple-buffer epilepsy inducing flicker. When I move the mouse from screen to screen and hover over the ubuntu launcher dock so that it scrolls the icons it will flip the triple buffers and the areas that have old data flickers. I think the display is triple buffered and one of the buffers gets old data. I can refresh the screen by dragging windows around manually like an "eraser" where I'm using the window to "erase old data" but this tends to get super annoying. It seems to get brought out by rotating one of my displays. I have a 1920x1200 pivoting display that is rotated to the left. My other display is 1920x1080 normal at position +1200+364. I seem to hit this a lot because my monitor doesn't have a good EDID so it comes up in ubuntu with an error message about crtcs (since it wants to do a 1920x1080 and it thinks the max is 1024x768) so after I set a new mode with: $ xrandr --newmode "1920x1080R" 138.50 1920 1968 2000 2080 1080 1083 1088 1111 +hsync -vsync; xrandr --addmode VGA-1 "1920x1080R" Once the new mode gets added Ubuntu will automatically restore my desktop to its old settings pre-reboot and I start getting the flicker/update problems. I would imagine that the bug should show itself up if you do a few rotate/unrotate displays. $ lsb_release -rd Description: Ubuntu 18.04.1 LTS Release: 18.04 $ apt-cache policy xserver-xorg-video-intel xserver-xorg-video-intel: Installed: 2:2.99.917+git20171229-1 Candidate: 2:2.99.917+git20171229-1 Version table: *** 2:2.99.917+git20171229-1 500 500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status $ xrandr Screen 0: minimum 320 x 200, current 3120 x 1920, maximum 8192 x 8192 VGA-1 connected primary 1920x1080+1200+364 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.00 800x600 60.32 56.25 848x480 60.00 640x480 59.94 1920x1080R 59.93* HDMI-1 connected 1200x1920+0+0 left (normal left inverted right x axis y axis) 519mm x 324mm 1920x1200 59.95*+ 1600x1200 60.00 1680x1050 59.88 1600x1000 60.01 1280x1024 85.02 75.02 60.02 1280x960 60.00 1152x864 75.00 1152x720 59.97 1024x768 75.03 60.00 832x624 74.55 800x600 75.00 60.32 640x480 75.00 59.94 720x400 70.08 DP-1 disconnected (normal left inverted right x axis y axis) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1808626/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp