I can't create a new seat1, no idea why.
Here is my current configuration:
-nvidia card + nvidia driver + nouveau blacklisted
- USB 3 dock station with displaylink driver + systemd service
- gdm
- systemd 219
---------------------------------------------------------------------------
$ loginctl seat-status
Sessions: *1 c1
Devices:
├─/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0
│ drm:card0
├─/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/renderD128
│ drm:renderD128
├─/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/graphics/fb0
│ [MASTER] graphics:fb0 "nouveaufb"
there is still some nouveau on your system, but if this belongs to seat0
this isn't a problem for now.
............................................................................
├─/sys/devices/platform/evdi.0/graphics/fb1
│ [MASTER] graphics:fb1 "evdidrmfb" [*]
├─/sys/devices/platform/evdi.1/drm/card2
│ drm:card2
├─/sys/devices/platform/evdi.1/graphics/fb2
│ [MASTER] graphics:fb2 "evdidrmfb" [*]
[*] attach these two also to seat1, or maybe seat1 and seat2. Your the usb3
displaylink has two monitor outputs, so you can create three seats ;-)
├─/sys/devices/virtual/misc/kvm
│ misc:kvm
└─/sys/devices/virtual/misc/rfkill
misc:rfkill
-------------------------------------------------------------------------------------
# loginctl attach seat1 /sys/devices/platform/evdi.1/drm/card2
then same for usb devices
$ ls /etc/udev/rules.d
72-seat-drm-platform-evdi_0.rules
72-seat-drm-platform-evdi_1.rules
72-seat-input-pci-0000_00_14_0-usb-0_10_4_1_1_1.rules
72-seat-input-pci-0000_00_14_0-usb-0_10_4_2_1_2.rules
72-seat-usb-pci-0000_00_14_0.rules
72-seat-usb-pci-0000_00_14_0-usb-0_10_4.rules
99-displaylink.rules
99-nvidia_seats.rules
If your nvidia card is only for seat0, you can remove this rule.
(everything without a rule belongs to seat0)
NB: All the 72-seat* have been created when I run $ loginctl attache
seat1 MyDevice
----------------------------
$ udevadmn info /sys/devices/platform/evdi.1/drm/card2
P: /devices/platform/evdi.1/drm/card2
N: dri/card2
E: DEVNAME=/dev/dri/card2
E: DEVPATH=/devices/platform/evdi.1/drm/card2
E: DEVTYPE=drm_minor
E: ID_FOR_SEAT=drm-platform-evdi_1
E: ID_PATH=platform-evdi.1
E: ID_PATH_TAG=platform-evdi_1
E: ID_SEAT=seat1
E: MAJOR=226
E: MINOR=2
E: SUBSYSTEM=drm
E: TAGS=:seat:seat1:uaccess:
E: USEC_INITIALIZED=160111782
------------------------------------------------------------
$ cat /etc/udev/rules.d/99-displaylink.rules
(shipped with the displaylink .rmp driver)
---------------------------------------
ACTION=="add", SUBSYSTEM=="usb", ENV{ID_VENDOR}=="DisplayLink",
MODE="0660", RUN+="/bin/systemctl start displaylink.service"
ACTION=="remove", SUBSYSTEM=="usb", ENV{ID_VENDOR}=="DisplayLink",
RUN+="/bin/systemctl stop displaylink.service"
----------------------------------------------
$ cat /etc/udev/rules.d/99-nvidia_seats.rules
----------------------------------------------------------
# provide a suitable udev rule to tag your NVIDIA card as
"master-of-seat"
SUBSYSTEM=="drm", KERNEL=="card[0-9]*", ATTRS{vendor}=="0x10de",
DRIVERS=="nvidia", TAG+="master-of-seat"
SUBSYSTEM=="pci", ATTRS{vendor}=="0x10de", DRIVER=="nvidia",
TAG+="seat", TAG+="master-of-seat"
----------------------------------------------------------------
cat /etc/udev/rules.d/72-seat-drm-platform-evdi_1.rules
-----------------------------------------------
TAG=="seat", ENV{ID_FOR_SEAT}=="drm-platform-evdi_1",
ENV{ID_SEAT}="seat1"
-------------------------------------------------
cat
/etc/udev/rules.d/72-seat-input-pci-0000_00_14_0-usb-0_10_4_1_1_1.rules
--------------------------------------
TAG=="seat", ENV{ID_FOR_SEAT}=="input-pci-0000_00_14_0-usb-0_10_4_1_1_1",
ENV{ID_SEAT}="seat1"
---------------------------------------------------
# systemctl restart systemd-udev-trigger.service (or even reboot)
$ loginctl show-session (two users logged in)
SESSION UID USER SEAT
2 1001 Martin seat0
1 1000 Louis seat0
c1 42 gdm seat0
3 sessions listed.
$ loginctl list-seats
SEAT
seat0
1 seats listed.
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
What am I missing? Why can't I create seat1 ?
Maybe # rm /etc/udev/rules.d/72* and try again ?
attach the [MASTER] graphics:fb* to seat1 and it should work.
success,
floris
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