Comment 8 for bug 1769857

Daniel van Vugt (vanvugt) wrote :

OK. Sounds like there is a device (/dev/* file) that you're not getting correct access to. And you can only get around that limitation by running as root (which is not recommended, for security).

In this case we may find it's an nvidia driver (or installation) bug. Although your original observation that it's a gdm problem might actually explain this too. I don't know if it's gdm, systemd or something else that handles the required privilege escalation to access /dev/GRAPHICS_THINGS so am reopening the gdm task in the hope that somebody else knows...