I had almost the same issue with the only difference that it didn't shut down, but every single program was very-very-very slow and nothing helped.
Computer: DELL Studio 1558 laptop (purchased about 6 months ago) The error I saw at every boot-reboot-shutdown was: "Critical temperature reached (110C), shutting down." Laptop behaviour: everything very slow, hdd temp=42-50 C, ACPI temp = 110C (I monitored it in the gnome-panel applet "computertemp") System: I was running Ubuntu 10.10 and this bug didn't appear immediately after upgrade (clean reinstall from 10.04). Last week I moved to Debian 6.0 (squeeze) due to my personal preferences and also hoping this bug to dissapear - but it didn't! Today I've found the fix: BIOS Update! Just performed the update (I had BIOS version A04 - updated to version A10) Now, everything looks and feels normal and smooth again! (computertemp shows "ACPI temp=27C") I found 2 ways to do it: 1) under Linux - through libsmbios package (explanations given for Debian, not Ubuntu, though) http://www.ducea.com/2007/08/27/dell-bios-firmware-updates-on-debian/ 2) via Windows 7 Live CD (not Windows XP, cause the DELL Studio 1558 BIOS doesn't support WinXP and you will have a Blue Screen of death with acpi.sys error!) I used the second way, cause there is no bios update file for linux for this laptop - why? explained here http://answerpot.com/showthread.php?1534809-Studio%201558%20BIOS%20updates%20not%20available ("Quite a few desktop and notebook systems don't have a method to update BIOS that's supported by firmware-tools. :-( In particular, this model has its Windows-executable BIOS in a package format that firmware-extract doesn't recognize.") Hope it will help! -- 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
