Public bug reported: I've updated to Ubuntu 20.04 a couple of weeks ago, and there are some minor (but pretty annoying) issues with Gnome Shell every time I load the system. The background image has some green/violet/black visual artifacts, and the text elements in Gnome Shell incorrectly display some of the symbol. Changing the background image removes the artifacts until the next reboot (but if I select the previous one without rebooting, then I still see the same artifacts, so it's probably cached somewhere). Restarting the shell via Alt+F2 `r` usually removes the artifacts from the background image, but the text issues are still present.
The issues are reprodicable with and without extensions, with 1.0, 1.5 and 2.0 display scaling factors applied, and they are not user-specific (i.e. I was able to reproduce them after creating a new user from scratch) As far as I can say, only Gnome Shell is affected. All the applications (including Gnome/GTK apps like Geary, Gedit, Tilix, both "native" and flatpak) work fine without any issues Sometimes, the application icons are also affected (as you can see on one of the attached screenshots) ~> lsb_release -rd Description: Ubuntu Focal Fossa (development branch) Release: 20.04 ~> apt-cache policy gnome-shell gnome-shell: Installed: 3.35.91-1ubuntu2 Candidate: 3.35.91-1ubuntu2 Version table: *** 3.35.91-1ubuntu2 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status ~> gsettings get org.gnome.mutter experimental-features ['x11-randr-fractional-scaling'] ~> uname -r 5.4.0-14-generic hwinfo (videocard, monitor): 38: PCI 02.0: 0300 VGA compatible controller (VGA) [Created at pci.386] Unique ID: _Znp.pq3kk9M9L4C SysFS ID: /devices/pci0000:00/0000:00:02.0 SysFS BusID: 0000:00:02.0 Hardware Class: graphics card Model: "Intel UHD Graphics 620" Vendor: pci 0x8086 "Intel Corporation" Device: pci 0x5917 "UHD Graphics 620" SubVendor: pci 0x17aa "Lenovo" SubDevice: pci 0x225c Revision: 0x07 Driver: "i915" Driver Modules: "i915" Memory Range: 0x2ffa000000-0x2ffaffffff (rw,non-prefetchable) Memory Range: 0x2fa0000000-0x2fafffffff (ro,non-prefetchable) I/O Ports: 0xe000-0xe03f (rw) Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled) IRQ: 161 (64308 events) Module Alias: "pci:v00008086d00005917sv000017AAsd0000225Cbc03sc00i00" Driver Info #0: Driver Status: i915 is active Driver Activation Cmd: "modprobe i915" Config Status: cfg=new, avail=yes, need=no, active=unknown 43: None 00.0: 10002 LCD Monitor [Created at monitor.125] Unique ID: rdCR.R7Dpg_aaVOC Parent ID: _Znp.pq3kk9M9L4C Hardware Class: monitor Model: "LG Display LCD Monitor" Vendor: LGD "LG Display" Device: eisa 0x058b Resolution: 2560x1440@60Hz Size: 309x174 mm Year of Manufacture: 2016 Week of Manufacture: 0 Detailed Timings #0: Resolution: 2560x1440 Horizontal: 2560 2608 2640 2720 (+48 +80 +160) -hsync Vertical: 1440 1450 1455 1481 (+10 +15 +41) +vsync Frequencies: 241.69 MHz, 88.86 kHz, 60.00 Hz Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #38 (VGA compatible controller) ** Affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Attachment added: "shell-example-2.png" https://bugs.launchpad.net/bugs/1867668/+attachment/5337648/+files/shell-example-2.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867668 Title: Visual artifacts in Gnome Shell after upgrading to 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1867668/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
