Hi,
I have an old Acer Aspire V3-571G with NVIDIA Optimus technology (3rd generation Intel HD 4000 + NVIDIA GeForce 630M).
Since I use this notebook for non-graphics tasks, I always turn off the Nvidia by using the Nix hardware repository. However, during the upgrade process to 25.05 (I am currently using unstable to see if the issue has been fixed upstream), the X session does not start at all. I tried using both video cards as a workaround, but I think the modesetting does not work with my hardware due to Mesa.
What I found:
- The old Intel driver has been removed from Nix 25.05 and I need to use the internal one with modesetting.
- The X server fails to start with the error: 'modeset(0): drmSetMaster failed: Permission denied".
- It seems Nvidia doesn’t even try to initialise.
It seems to be a permissions error. Can someone help by suggesting what needs to be updated in the config to fix this issue?
The configuration file is located here: GitHub - vkravets/nixos-acer-config
The GDM session start logs can be viewed here
P.S> NixOS live graphic ISO starts, but in the Gnome there is an issue with render, but starts =) and Plasma also starts without any issue.