[LightDM] SwitchToGreeter vs. LogIn

[poma]

On 02.07.2016 17:11, poma wrote:
> 
> Guys, do not hesitate to comment if you can help.
> 
> In a nutshell, once spawn - SwitchToGreeter breaks LogIn.
> So far this happens with GPU driven by Nouveau
> and
> LightDM >= 1.18.2
> 
> More specifically, breakage starts with:
> https://bazaar.launchpad.net/~lightdm-team/lightdm/1.18/revision/2319
> 
> If you are going to test, whether it's working or not,
> besides the test result, please also provide the following command output:
> 
> lspci -knn -d ::300
> 
> 
> Test compilation:
> http://goo.gl/Gm4ffO
> iso/
> 
> How to test:
> 0. Boot System
> 1. Logi In
> 2. Switch User
> 3. Unlock
> 4. Log Out
> 5. Log In ?
> 
> Ref.
> https://bugs.freedesktop.org/show_bug.cgi?id=96737
> 
> 


The same issue is with LightDM 1.19.3

Tests building results and logs can be found here:
http://goo.gl/Gm4ffO
greeter/


p.s.

I found this during testing,
Log In a session -is- possible, -but- aided with manual VTs switching,

- 1st Log In after SwitchToUser caused breakage needs Ctrl+Alt+F2
- 2nd needs Ctrl+Alt+F1
- 3rd again Ctrl+Alt+F2
- etc.

back and forth, in between VTNr=2 and VTNr=1

It is as if sessions is waiting at the wrong VT number.