Just upgraded to Ubuntu 20.4, seeing same symptoms, screen artifacts after X startup and some fonts corruption. Font problems are in some applications/windows only, e.g. Chrome window, gvim, terminal are all fine (so far). However Unity taskbar and System tray usually have broken fonts (some characters).
Video card: 00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics 655 (rev 01) It happens with or without custom config (needed to stop video tearing): Section "Device" Identifier "Intel Graphics" Driver "Intel" Option "AccelMethod" "sna" Option "TearFree" "true" Option "TripleBuffer" "true" Option "MigrationHeuristic" "greedy" Option "Tiling" "true" Option "Pageflip" "true" Option "ExaNoComposite" "false" Option "Tiling" "true" Option "Pageflip" "true" EndSection Also tried Wayland but it's a no go because it freezes right after I enter password in gdm3. -- 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/1864778 Title: Intel Drivers Artifacts after Mesa-Dev Update Status in xserver-xorg-video-intel package in Ubuntu: Confirmed Bug description: After the update from the 20.04 LTS fresh live image from 19.3.3-1ubuntu1 to 20.0.0-1ubuntu1 mesa I get serious artifacts on startup when using the intel driver instead of modesetting. These artifacts go away when I enable Option AccelMethod "uxa" but persist if the default, "sna" or the other modes are used "none", "off", "blt". These pixels appear throughout the experience of using Ubuntu and generate in sporadic places. The font also looks completely broken. I've never had this issue before with the Intel drivers. I have Skylake HD 530. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1864778/+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
