FYI: I have sent a group of patches to Len Brown (ACPI tree maintainer) that adds hwmon support to thinkpad-acpi (ibm-acpi's new name). It exports 16 temperatures and one fan with PWM control through the hwmon interface, and targets 2.6.22. The patches make extensive use of ENXIO for temperature sensors that are hotpluggable but for which we cannot detect the plug/unplug events. Reading a sensor that is not present at that instant returns ENXIO. The patches are available in the ibm-acpi-devel and linux-acpi ML archives, and also by request or through http://repo.or.cz/w/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh
