ubuntu-multiseat team mailing list archive

[Launchpad Bug Tracker <903194@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug by a7x (a7x):

I have a multiseat xorg.conf setup on Arch Linux (with ServerLayouts
called seat-chris and seat-brynn)

Based on the below details, it seems that -sharevts is needed, but not
handled correctly by lightdm


If I use a fairly minimal config, I get:
When lightdm starts, Seat 0 is activated
Ctrl-Alt-F8 on Seat 0 kbd activates Seat 1 (deactivates Seat 0)
Ctrl-Alt-F7 on Seat 1 kbd activates Seat 0 (deactivates Seat 1)

lightdm.conf:
--------------------
[LightDM]
start-default-seat=false
[SeatDefaults]
session-wrapper=/etc/lightdm/Xsession
xserver-config=xorg.conf.multiseat
[Seat:0]
xserver-layout=seat-chris
[Seat:1]
xserver-layout=seat-brynn

pstree
-----------
lightdm,9833 /etc/init.d/lightdm start
  `-lightdm,9834
      |-X,9839 :0 -config xorg.conf.multiseat -layout seat-chris -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
      |-X,9841 :1 -config xorg.conf.multiseat -layout seat-brynn -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
      |-lightdm-gtk-gre,9860
      |   `-{lightdm-gtk-gr},9861
      |-lightdm-gtk-gre,9881
      |   `-{lightdm-gtk-gr},9882
      |-{lightdm},9837
      |-{lightdm},9840
      |-{lightdm},9863
      `-{lightdm},9884


When I use the sharevts flag on Seat 1, I see the following:
On lightdm start, Seat 0 is activated
After a second or so, Seat 0 goes blank, and Seat 1 is activated
Pressing Ctrl-Alt-F7 on Seat 1 activates Seat 0 again, and I can log in on both correctly

lightdm.conf
-----------------
[LightDM]
start-default-seat=false
[SeatDefaults]
session-wrapper=/etc/lightdm/Xsession
xserver-config=xorg.conf.multiseat
greeter-hide-users=false
[Seat:0]
xserver-layout=seat-chris
[Seat:1]
xserver-command=/usr/bin/X -sharevts
xserver-layout=seat-brynn

pstree
-----------
lightdm,21164 /etc/init.d/lightdm start
  `-lightdm,21165
      |-X,21171 :0 -config xorg.conf.multiseat -layout seat-chris -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
      |-X,21173 -sharevts :1 -config xorg.conf.multiseat -layout seat-brynn -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
      |-lightdm-gtk-gre,21192
      |   `-{lightdm-gtk-gr},21193
      |-lightdm-gtk-gre,21210
      |   `-{lightdm-gtk-gr},21211
      |-{lightdm},21168
      |-{lightdm},21172
      |-{lightdm},21195
      `-{lightdm},21215


If I try sharevts on both sessions, I see the following:

On lightdm start, Seat 1 starts up
Seat 0 shows a mouse pointer on a text mode console printing the kernel message 'Invalid Framebuffer ID'
If I force kill lightdm and restart it using the init.d service, then it starts correctly

lightdm.conf
------------------
[LightDM]
start-default-seat=false
[SeatDefaults]
session-wrapper=/etc/lightdm/Xsession
xserver-config=xorg.conf.multiseat
greeter-hide-users=false
[Seat:0]
xserver-command=/usr/bin/X -sharevts
xserver-layout=seat-chris
[Seat:1]
xserver-command=/usr/bin/X -sharevts
xserver-layout=seat-brynn

pstree
--------
lightdm,32594 /etc/init.d/lightdm start
  `-lightdm,32595
      |-X,32599 -sharevts :0 -config xorg.conf.multiseat -layout seat-chris -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
      |-X,32603 -sharevts :1 -config xorg.conf.multiseat -layout seat-brynn -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
      |-lightdm-gtk-gre,32620
      |   `-{lightdm-gtk-gr},32623
      |-lightdm-gtk-gre,32640
      |   `-{lightdm-gtk-gr},32643
      |-{lightdm},32598
      |-{lightdm},32600
      |-{lightdm},32645
      `-{lightdm},4109

** Affects: lightdm
     Importance: Undecided
     Assignee: a7x (a7x)
         Status: In Progress

** Affects: lightdm (Ubuntu)
     Importance: Undecided
     Assignee: a7x (a7x)
         Status: In Progress


** Tags: multiseat
-- 
multiseat not set up correctly
https://bugs.launchpad.net/bugs/903194
You received this bug notification because you are a member of Ubuntu Multiseat, which is subscribed to the bug report.