I have experienced the same issue with a Nokia 5200, either in Nokia connection mode or in USB Storage mode.
I have tested it on several machines with Ubuntu Dapper and Edgy and the same thing happens, I get to read some files and after a few moments it stops reading or freezes the whole system. On any windows machine I have been able to test it, works without a problem as USB storage. -- kubuntu edgy freezes when USB phone plugged in https://launchpad.net/bugs/76495 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs