I'd like to report that this issue is also being reproduced with nouveau on NVIDIA GF108. However, my dmesg does not seem to contain nouveau errors.
dmesg sample containing nouveau (as above): [ 5.254956] nouveau 0000:01:00.0: enabling device (0006 -> 0007) [ 5.255096] nouveau 0000:01:00.0: NVIDIA GF108 (0c1480a1) [ 5.285074] nouveau 0000:01:00.0: bios: version 70.08.a8.00.2b [ 5.393498] nouveau 0000:01:00.0: fb: 2048 MiB DDR3 [ 5.449440] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB [ 5.449441] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB [ 5.449444] nouveau 0000:01:00.0: DRM: TMDS table version 2.0 [ 5.449454] nouveau 0000:01:00.0: DRM: DCB version 4.0 [ 5.449455] nouveau 0000:01:00.0: DRM: DCB outp 00: 02010300 00000000 [ 5.449457] nouveau 0000:01:00.0: DRM: DCB conn 00: 00000000 [ 5.451120] nouveau 0000:01:00.0: DRM: MM: using COPY0 for buffer copies [ 5.485363] nouveau 0000:01:00.0: DRM: allocated 1024x768 fb: 0x60000, bo 0000000010a8d043 [ 5.488176] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device [ 5.512017] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 1 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1760201 Title: ubuntu 18.04 GDM - missing icons and letters on login screen with nouveau + Wayland Status in linux package in Ubuntu: Incomplete Status in mesa package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Confirmed Bug description: WORKAROUND: Edit /etc/gdm3/custom.conf and uncomment: #WaylandEnable=false --- Ubuntu 18.04(Updated 30.03.2018) System Language: Turkish Please check screenshots --- ApportVersion: 2.20.9-0ubuntu2 Architecture: amd64 CurrentDesktop: GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-03-24 (9 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180324) Package: gnome-shell PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 Tags: bionic Uname: Linux 4.15.0-13-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1760201/+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