feat(nvidia): add service to sync Flatpak driver version

[ledif]

Tested it on my Bazzite machine, which has an NVIDIA card.

○ ublue-nvidia-flatpak-runtime-sync.service - Sync NVIDIA system drivers with Flatpak runtime
     Loaded: loaded (/etc/systemd/system/ublue-nvidia-flatpak-runtime-sync.service; enabled; preset: disabled)
    Drop-In: /usr/lib/systemd/system/service.d
             └─10-timeout-abort.conf
     Active: inactive (dead) (Result: exec-condition) since Wed 2026-04-01 09:16:00 CDT; 1s ago
 Invocation: dedef8b0919a46bca0c115e0bf7a1ae3
  Condition: start condition unmet at Wed 2026-04-01 09:16:00 CDT; 1s ago
    Process: 4341 ExecCondition=/usr/local/bin/TEST-ublue-nvidia-flatpak-runtime-sync check (code=exited, status=1/FAILURE)
   Mem peak: 1.6M
        CPU: 5ms

Apr 01 09:16:00 llano systemd[1]: Starting ublue-nvidia-flatpak-runtime-sync.service - Sync NVIDIA system drivers with Flatpak runtime...
Apr 01 09:16:00 llano systemd[1]: ublue-nvidia-flatpak-runtime-sync.service: Skipped due to 'exec-condition'.
Apr 01 09:16:00 llano systemd[1]: Condition check resulted in ublue-nvidia-flatpak-runtime-sync.service - Sync NVIDIA system drivers with Flatpak runtime being skipped.

It exited because the Flatpak platform was already in sync with the on image driver version, but it seems like it should work when they are not synced.

[renner0e]

Sorry for the bikeshed but we can probably skip the cat here

[ledif]

Actually, this was broken. I had to change it to use head -1 instead and fix the regex.

This is what the driver reports:

❯ cat /proc/driver/nvidia/version
NVRM version: NVIDIA UNIX Open Kernel Module for x86_64  595.58.03  Release Build  (builder@dbdfa680a27e)  Wed Mar 25 09:03:45 UTC 2026
GCC version:  gcc version 15.2.1 20260123 (Red Hat 15.2.1-7) (GCC) 

But the grep was failing to match the version correctly:

❯ sudo bash -x /usr/local/bin/TEST-ublue-nvidia-flatpak-runtime-sync check
+ set -euo pipefail
++ grep -oP 'Kernel Module\s+\K[0-9]+\.[0-9]+\.[0-9]+' /proc/driver/nvidia/version
+ SYSTEM_NVIDIA_VERSION=

After updating the regex:

❯ sudo bash -x /usr/local/bin/TEST-ublue-nvidia-flatpak-runtime-sync check
+ set -euo pipefail
++ head -1 /proc/driver/nvidia/version
++ grep -oP '\d+\.\d+\.\d+'
+ SYSTEM_NVIDIA_VERSION=595.58.03
++ echo 595.58.03
++ tr . -
+ FLATPAK_NVIDIA_VERSION=595-58-03
+ case "${1}" in
+ flatpak info --system org.freedesktop.Platform.GL.nvidia-595-58-03
+ flatpak info --system org.freedesktop.Platform.GL32.nvidia-595-58-03
+ echo 'NVIDIA Flatpak runtime 595.58.03 already installed'
NVIDIA Flatpak runtime 595.58.03 already installed
+ exit 1

[renner0e]

I can't test this because I don't have the hardware but if it works we might want to put this in bluefin common

[ledif]

Closing in favor of projectbluefin/common#257.