I have found that current /lib/udev/rules.d/61-gdm.rules can be fixed by swapping the order of the single and escaped double quotes from...
IMPORT{program}="/bin/sh -c \"sed -e 's/: /=/g' -e 's/\([^[:upper:]]\)\([[:upper:]]\)/\1_\2/g' -e 's/[[:lower:]]/\U&/g' -e 's/^/NVIDIA_/' /proc/driver/nvidia/params\"" which fails to parse correctly to... IMPORT{program}="/bin/sh -c 'sed -e \"s/: /=/g\" -e \"s/\([^[:upper:]]\)\([[:upper:]]\)/\1_\2/g\" -e \"s/[[:lower:]]/\U&/g\" -e \"s/^/NVIDIA_/\" /proc/driver/nvidia/params'" which parses properly and allows the test for ENV{NVIDIA_PRESERVE_VIDEO_MEMORY_ALLOCATIONS}!="1", GOTO="gdm_disable_wayland" to succeed when /etc/modprobe.d/nvidia-power-management.conf contains... options nvidia NVreg_PreserveVideoMemoryAllocations=1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1969447 Title: 42.0-1ubuntu6 doesn't recongize the presence of NVIDIA_PRESERVE_VIDEO_MEMORY_ALLOCATIONS=1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1969447/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs