2014-02-19 3:48 GMT-03:00 Richard Hansen <[email protected]>:
> How do you get loginctl to create udev rules for you? > Basically: loginctl list-seats ==> get available seats loginctl seat-status <seat-id> ==> get list of devices assigned to seat <seat-id> loginctl attach <seat-id> /sys/devices/path/to/device ==> assign a device to seat <seat-id> (attach a master-of-seat device to a non-existent seat to create it). > and MatchSeat key will prevent X server from trying to apply my SM501 > > config to my Intel onboard graphics card. > > If I understand the X source code correctly, it shouldn't touch your > Intel graphics card if your Intel card is associated with a different > seat (unless you manually specify it in your xorg.conf). > In my case, the Intel graphics card doesn't need any further manual setting in xorg.conf, but the SM501 card does. In principle, I could just write a custom xorg.conf.sm501 file with the needed settings for my card and pass it to my non-seat0 X server via "-config" option (e.g.: setting xserver-config option in lightdm.conf). However, in two scenarios, it's impossible: a) when I use GDM as my display manager, since it doesn't allow passing custom options to X servers. b) when I use systemd-multi-seat-x wrapper, since it overrides my -config option with its own one. To overcome these limitations, I would need to put my SM501 settings in a .conf file in /etc/X11/xorg.conf.d folder (so that systemd-multi-seat-x can't override it), but it has a side effect: X server would apply that file for all seats, potentially misconfiguring my Intel graphics card. To avoid this conflict, Oleg Samarin has written that MatchSeat patch, so that a given "Device", "Screen" or "ServerLayout" section in xorg.conf only applies to the X server with -seat option matching the given MatchSeat value. CANTATE DOMINO CANTICUM NOVUM QUIA MIRABILIA FECIT Laércio
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