Can you attach dmesg for boots with the two different BIOS options? It's normal that Linux will cause the machine to run hotter than Windows. Our run-time power management support is much worse.
** Changed in: acpi-support (Ubuntu) Sourcepackagename: acpi-support => linux-source-2.6.17 -- Amilo 1520 sleep doesn't resume from suspend, caused by video bios? https://launchpad.net/bugs/52967 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs