diff options
Diffstat (limited to 'docs/multiseat.txt')
| -rw-r--r-- | docs/multiseat.txt | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/docs/multiseat.txt b/docs/multiseat.txt index b963665ef..ebf244693 100644 --- a/docs/multiseat.txt +++ b/docs/multiseat.txt @@ -2,8 +2,8 @@ multiseat howto (with some multihead coverage) ============================================== -host side ---------- +host devices +------------ First you must compile qemu with a user interface supporting multihead/multiseat and input event routing. Right now this @@ -41,6 +41,19 @@ The "display=video2" sets up the input routing. Any input coming from the window which belongs to the video.2 display adapter will be routed to these input devices. +Starting with qemu 2.4 and linux kernel 4.1 you can also use virtio +for the input devices, using this ... + + -device pci-bridge,addr=12.0,chassis_nr=2,id=head.2 \ + -device secondary-vga,bus=head.2,addr=02.0,id=video.2 \ + -device virtio-keyboard-pci,bus=head.2,addr=03.0,display=video.2 \ + -device virtio-tablet-pci,bus=head.2,addr=03.0,display=video.2 + +... instead of xhci and usb hid devices. + +host ui +------- + The sdl2 ui will start up with two windows, one for each display device. The gtk ui will start with a single window and each display in a separate tab. You can either simply switch tabs to switch heads, @@ -106,6 +119,26 @@ the devices attached to the seat. Background info is here: http://www.freedesktop.org/wiki/Software/systemd/multiseat/ + +guest side with pci-bridge-seat +------------------------------- + +Qemu version 2.4 and newer has a new pci-bridge-seat device which +can be used instead of pci-bridge. Just swap the device name in the +qemu command line above. The only difference between the two devices +is the pci id. We can match the pci id instead of the device path +with a nice generic rule now, which simplifies the guest +configuration: + + [root@fedora ~]# cat /etc/udev/rules.d/70-qemu-pci-bridge-seat.rules + SUBSYSTEM=="pci", ATTR{vendor}=="0x1b36", ATTR{device}=="0x000a", \ + TAG+="seat", ENV{ID_AUTOSEAT}="1" + +Patch with this rule has been submitted to upstream udev/systemd, was +accepted and and should be included in the next systemd release (222). +So, if your guest has this or a newer version, multiseat will work just +fine without any manual guest configuration. + Enjoy! -- |