I've installed the mainline kernel 2.6.34-999-generic and so far I haven't had a lock up. I can't vouch that it's fixed yet but so far it's the longest that Ubuntu has stayed up on my laptop (now over 2 hours). I'll let you know in a few days/weeks if it still seems to be working ok. As an added bonus the usb 3 ports now seem to work as well. Seems 2.6.33 is not a good choice of kernel for this laptop at all.
I've installed the mainline kernel 2.6.34-999-generic and so far I haven't had a lock up. I can't vouch that it's fixed yet but so far it's the longest that Ubuntu has stayed up on my laptop (now over 2 hours). I'll let you know in a few days/weeks if it still seems to be working ok. As an added bonus the usb 3 ports now seem to work as well. Seems 2.6.33 is not a good choice of kernel for this laptop at all.