I can confirm this bug still exists in Ubuntu 10.10 (and 10.04). I have a Toshiba U500-119 and the issue mainly comes from a buggy DSDT table. Vendors are totally unable to compile their DSDT table correctly for non-Windows OS.
After fixing errors in my DSDT table and recompiling it (then include it in my kernel...) I could use my laptop in normal conditions with a working fan. Please find my DSDT table in attachment, What I needed to do was replacing "L0r" by "And" in PowerResource methods. There are still some warnings but I don't know how to fix them. The workaround was found here and can be applied to any buggy DSDT tables : http://art.ubuntuforums.org/showthread.php?t=1473317&page=3 This bug is extremely severe, it was kicked in 2009 and is still not solved, even if it applies to many laptops. ** Attachment added: "DSDT table with fixed" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/370173/+attachment/1834803/+files/dsdt.dsl -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/370173 Title: laptop overheats and suddenly shuts down/off -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs