Op 2/12/2023 om 14:18 schreef Bagas Sanjaya:
On Thu, Nov 30, 2023 at 11:48:24AM +0100, Gert Vanhaerents wrote:
Hi Kernel list,
I'm the IT person of a school, earlier we used multiseatcomputers for the
school, i have maded with a XGL implementation and it works fine but not so
fantastic. The school wants that i build new computers but the XGL project
is too outdated so i can't use it anymore.
How can i make a multiseatcomputer with more then one user on one card with
systemd? I have asked already to the makers of systemd but they said it's a
kernel problem.
With Systemd loginctl and the nouveau drivers you have this:
─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0
│ [MASTER] drm:card0
│
├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-DVI-D-1
│ │ [MASTER] drm:card0-DVI-D-1
│
├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-HDMI-A-1
│ │ [MASTER] drm:card0-HDMI-A-1
│
└─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-VGA-1
│ [MASTER] drm:card0-VGA-1
├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/renderD128
│ drm:renderD128
├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/graphics/fb0
│ graphics:fb0 "nouveaudrmfb"
So it will be:
loginctl attach seat1 /sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-VGA-1
For the seat1 (the VGA d-sub output for seat1 and the other HDMI output for
seat0) and of course the mouse and keyboard.
When you do this, all the graphics outputs are on the second seat (seat1)
and not anymore on the first seat. So i need to move only the VGA output to
seat1 and not all the outputs.
Do you expect that GUI output is on both seats?
I want the result that i have one seat (seat0) on the VGA/D-sub output
of the graphic card
a second seat (seat1) on the HDMI output of the graphic card
and a third seat (seat2) on the DVI output of the graphic card
In theory it should work with the following:
loginctl attach seat1
/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-HDMI-A-1
loginctl attach seat2
/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-DVI-D-1
But when i do this all the outputs will be used on seat2 (because they
do all the outputs automaticly to the latest attached seat)
When i install the proprietary Nvidia drivers, i have the following:
[MASTER] pci:0000:08:00.0
│ ├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0
│ │ [MASTER] drm:card0
│
└─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/renderD128
│ drm:renderD128
─/sys/devices/platform/efi-framebuffer.0/graphics/fb0
│ graphics:fb0 "EFI VGA"
So no VGA, DVI or HDMI items.
Then report to the GitHub tracker [1].
Thanks.
[1]: https://github.com/NVIDIA/open-gpu-kernel-modules/issues
