Ubuntu 18.04: missing letters in login screen

login-screen

I'solved this on my machine by editing /etc/gdm3/custom.conf and uncommenting:

#WaylandEnable=false

Found this info here: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1760201


I have fixed this issue. Settings -> Language and Region -> in upper right corner "Login Screen". And change Language to English(United Kingdom) and change Formats to United Kingdom. After this, reboot. Probably it help you.


I had a similar issue, solved by installing the NVidia graphics driver:

sudo ubuntu-drivers autoinstall

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