Comment 13 for bug 749811

On my Toshiba Satellite M305D-S4830, I get the same problem. I am using a clean install of Natty, Kernel Linux 2.6.38-8-generic 64 bit version. Before installing this version, I also used Natty 32 bit version and did not have this problem of my computer hanging after the display goes to sleep. I was able to resume use of my laptop by shaking the mouse. After replacing with the 64bit version however, anytime the display starts to dim, then goes to sleep, the computer hangs. It doesn't matter how many programs I have running. The only other problem I have had on the 32 bit and 64 bit version is getting forced-logged out randomly while I'm in the middle of working on the computer and getting returned to the log in screen, which has happened twice. Once on the 32bit version and another time on the 64 bit which I am currently running.