How can we even know whether the Nvidia power mananagement support is
broken or working if the Ubuntu Nvidia packaging never starts nvidia-
hibernate.service, nvidia-powerd.service, nvidia-resume.service and
nvidia-suspend.service like rpmfusion on Fedora? Of course, we would
need a /etc/modprobe.d/nvidia-power-management.conf to get
NVreg_PreserveVideoMemoryAllocations=1. However, I'm still unconvinced
that the current check for NVreg_PreserveVideoMemoryAllocations=1 in
61-gdm.rules is really functional. In my hands, even though I had
NVreg_PreserveVideoMemoryAllocations=1 present from addition of a
/etc/modprobe.d/nvidia-power-management.conf contaiining....
options nvidia NVreg_PreserveVideoMemoryAllocations=1
the test...
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\""
ENV{NVIDIA_PRESERVE_VIDEO_MEMORY_ALLOCATIONS}!="1", GOTO="gdm_disable_wayland"
in 61-gdm.rules never recognized its presence. It seems like the rule
might not be properly parsing the escaped quotes.
Also, I looked at the Debian packaging for nvidia and I don't see any
evidence that they have ever started those power management related
services.
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https://bugs.launchpad.net/bugs/1968929
Title:
No Wayland support on my NVIDA laptop
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