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[Bug 1190581] Re: Support logind's automatic multiseat feature

 

** Description changed:

- Now that initial logind support
- https://bugs.launchpad.net/lightdm/+bug/930488 was released for LightDM,
- I'm opening this bug to request a step further: provide support to
- logind's automatic multiseat feature.
+ [Impact]
+ LightDM does not use the information provided by logind to support automatic multi-seat setups. We have backported this support from LightDM 1.12 so this functionality can be used in 14.04 LTS. It is disabled by default.
  
- I have absolutely no experience with D-Bus interfaces, but it seems that
- LightDM has its own D-Bus interface for seat management, so I don't know
- what would be better: replace it with logind D-Bus interface (if logind
- is present) or chaining both (e.g.: a logind's SeatNew D-Bus signal
- should trigger LightDM's SeatAdded D-Bus signal). Does it make sense?
+ [Test Case]
+ 1. Enable multiseat in the LightDM configuration:
+  [LightDM]
+  logind-load-seats=true
+ 2. Start LightDM
+ Expected result:
+ The greeter is shown on both monitors and two sessions can be logged in.
+ Observed result:
+ Currently only one monitor / seat works.
+ 
+ [Regression Potential]
+ There is some risk of unrelated code being changed. This has been reduced by the use of regression tests, manual testing and providing this in the Ubuntu Desktop PPA.

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https://bugs.launchpad.net/bugs/1190581

Title:
  Support logind's automatic multiseat feature

Status in Light Display Manager:
  Fix Released
Status in Light Display Manager 1.10 series:
  Fix Released
Status in “lightdm” package in Ubuntu:
  Fix Released
Status in “lightdm” source package in Trusty:
  Triaged
Status in “lightdm” source package in Utopic:
  Fix Released
Status in “lightdm” package in Fedora:
  Unknown

Bug description:
  [Impact]
  LightDM does not use the information provided by logind to support automatic multi-seat setups. We have backported this support from LightDM 1.12 so this functionality can be used in 14.04 LTS. It is disabled by default.

  [Test Case]
  1. Enable multiseat in the LightDM configuration:
   [LightDM]
   logind-load-seats=true
  2. Start LightDM
  Expected result:
  The greeter is shown on both monitors and two sessions can be logged in.
  Observed result:
  Currently only one monitor / seat works.

  [Regression Potential]
  There is some risk of unrelated code being changed. This has been reduced by the use of regression tests, manual testing and providing this in the Ubuntu Desktop PPA.

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