I have no experience with WinXP, but my Toshiba Tecra8100 is also much hotter under Ubuntu than its previous Win98 OS. Although this apparently does not interfere with performance, it's uncomfortable for the user; I have therefore installed the toshset utilities and keep the the fan on permanently as a workaround.
-- Laptop too hot https://launchpad.net/bugs/49848 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs