I've seen similar bug reports before. To help us confirm it's the same issue, please run:
lspci -k and send us the output. ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1782458 Title: Missing letters scattered across the interface Status in gnome-shell package in Ubuntu: Incomplete Bug description: Today my gnome-shell instance did something extremely strange. Suddenly around 2/3 of the letters, randomly scattered, were missing from the interface. I've attached a screenshot. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.2-0ubuntu0.18.04.1 ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18 Uname: Linux 4.15.0-24-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu Jul 19 01:23:21 2018 DisplayManager: gdm3 InstallationDate: Installed on 2018-05-31 (48 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1782458/+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