I found the two bugs below may be related to my bug report. Removing the accountsservice check of lightdm will fix the issue.
This bug is fixed, if it's not a regression, that fix doesn't work on the slow greeter problem. https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1443178
This one is still pending. https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/996791
I found the two bugs below may be related to my bug report. Removing the accountsservice check of lightdm will fix the issue.
This bug is fixed, if it's not a regression, that fix doesn't work on the slow greeter problem. /bugs.launchpad .net/ubuntu/ +source/ accountsservice /+bug/1443178
https:/
This one is still pending. /bugs.launchpad .net/ubuntu/ +source/ accountsservice /+bug/996791
https:/