-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 control: tag -1 help control: retitle lightdm user needs access to DRI render nodes on some platforms
On Sat, 2025-02-15 at 11:54 +0100, Heiko Stübner wrote: > > I got that the first time, but I think that should be exactly the same > > thing. > > Unfortunately it seems that the greeter session doesn't have the same > > permissions through loginctl/systemd/udev stack, at least I don't have the > > acl > > either. > > > > I don't have much clue here but I don't think it's something specific to > > LightDM though. > > > > > > Hence without user "lightdm" being in group render, lightdm only > > > displays > > > said black screen and the error in the seat-log and does _not_ reach any > > > login prompt at all. > > > > What greeter do you use? Here (with lightdm-gtk-greeter) even without the > > correct acl on /dev/dri/renderD128 I don't have permission access in the > > log, > > and obviously it works just fine for everyone else. > > For me it's also just the lightdm-gtk-greeter. Ok. So it's more about something with the whole device stack. I have no clue here so help from the systemd/loginctl/dbus folks will likely be needed. Since it wasn't clear: I'm not adding lightdm user to the render group, that should be done dynamically. I have no idea how to make that happens similarly to more interactive users (for which it works just fine) so any pointer appreciated. Regards, - -- Yves-Alexis -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAmewdOkACgkQ3rYcyPpX RFt8ZAf9GUeF3/Pb6NwAIINArvaKFwfqzQztTB/6lCrGSzVbSJxRMh7QTiUquFRo avVVrU66Xyi7ZWSXJ9jsoR7bOAIWexuysFdgE2kbLNrDMoq3iGJicmu/3AjJQEmw q++hxBaxURC+lPZlaFjUSHeTYc5MJRFEcxdjqVUUUE/oi0h5sv2xkvRj0gYKav2p tWv6zmCtVvR7SAk7XsY9W2D1VhCehzyshwHmlkziG25h94RHSxlw7ChHcE2Yrt6D fg9gHUavoYC5yqhZABsIB7/ynZv6LNabB1wXeo4DE0c/CGnWUkrXWXhClQ4y2bMv C4X1BZMpy2hXxVHk5ypZg4EPAlPjjA== =YLv+ -----END PGP SIGNATURE-----
