Bug 779686

Created attachment 505157 [details]
the film about this problem

User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:15.0) Gecko/20100101 Firefox/15.0.1

i have installed ubuntu 12.04 and opensuse 12.2 alongside each other. i first installed ubuntu 12.04 (because it uses grub 1.99) and then installed opensuse 12.2 (using live kde cd). every thing is ok about grub and boot plash for both distros BUT:

ubuntu is ok but when i want to boot openSUSE its splash is ok but when it comes to login screen, page graphic completely become corrupted. in this corrupted page i can see some colors that are similar to ubuntu theme (also if i restart my laptop from ubuntu to boot openSUSE, sometimes it shows last opened page in ubuntu but with corrupted graphic!!!). i think opensuse combine or admix some files from ubuntu partition that cause this problem. i also take a film with my phone about this problem:

http://youtu.be/lpISFoCtTHY
or
http://www.aparat.com/v/f9Vjw 

i should add there is nothing shared between two distros but swap. and i restarted and also shutdown the system several times to solve the problem but is did not solved. 

after that, i installed non-free nvidia graphic driver in openSUSE, and the problem solved. but i am curious why free graphic driver (nouveau) cause to such a strange problem?

Reproducible: Always

Steps to Reproduce:
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