I can confirm this bug. I am using gutsy, nvidia graphics with restricted drivers and compiz enabled.
Steps to reproduce:
1. Login as user A
2. System->Quit->Switch User
3. Login as user B
4. System->Quit->Switch User
5. Relogin an user A
The screen goes white and get inresponsive. I click System->Quit->Switch User what takes about 2 minutes and relogin as user A and I can work as expected without the white screen but 3d effects.
I can confirm this bug. I am using gutsy, nvidia graphics with restricted drivers and compiz enabled.
Steps to reproduce:
1. Login as user A >Quit-> Switch User >Quit-> Switch User
2. System-
3. Login as user B
4. System-
5. Relogin an user A
The screen goes white and get inresponsive. I click System- >Quit-> Switch User what takes about 2 minutes and relogin as user A and I can work as expected without the white screen but 3d effects.