White Screen on login

[chyapay]

Hello! I randomly get this bug on login, and i don't even have a simple clue with what it depends on.
When i log into my user at gnome environment set as just "Gnome", often (probably like 7 times per 10 logins) it paints all the screen area with white color and there is a plain mouse cursor and that's it, i can't do nothing but ctrl+alt+backspace to run the login screen again. Then i choose "Failsafe Gnome" and everything goes well in that mode. It is always OK in "failsafe gnome". But whenever I choose just normal "Gnome", i get under the risk of its whitescreen crash. It's annoying me and i'd rather prefer to work in non-failsafe environment, and no update helps. The problem still persists on my up-to-date Helena Mint Linux 32-bit. For info, i got 1 Gb RAM and 250 GB HDD, and i use Athlon Barton 2200+. Thx for attention.

[remoulder]

This section is for reporting bugs not for problems. Please post again in another section, probably Hardware support.