I believe I have similar problem with my laptop, a LG LW65 Express. I am using Ubuntu 10.04 and it works fine, but sometimes the screen goes black and the system simply doesn't respond, requiring a so called hard reset. My VGA card is an ATI x700 mobility. In my opinion, the crashes are completely random. They don't happen because I start an extremely demanding application, they come out of nowhere.
** Attachment added: "This is the result of the "lspci -vvnn" comand on my laptop" http://launchpadlibrarian.net/52635390/lspci-vvnn -- [RV350] system freeze randomly unless XAA used https://bugs.launchpad.net/bugs/349229 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs