That is, there is a space here between LIN and UX that should not be there:
GRUB_CMDLINE_LIN UX_DEFAULT="quiet splash i8042.nomux i8042.nopnp i8042.noloop" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1936381 Title: package grub-pc 2.04-1ubuntu35.6 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 127 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1936381/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs