Linus Torvalds wrote: (it thinks all fans are on), but no fans are actually on: cat /proc/acpi/fan/*/* status: off status: off status: off status: off I saw a related problem with suspend to disk; a second suspend to RAM would hang while suspending -- bugzilla 5989, 6749 -- so I couldn't test its effect on the fans. After resuming, the fans would be off but the system thought they were on, and the fan/*/* files would confirm that wrong idea. Because the fans were allegedly on, they would never get turned on, even as the temperature climbed into the sky. I reported this problem to the acpi list and bugzilla, and the fan driver was fixed to have suspend/resume methods, and that plus other patches eventually fixed it for my box (IBM TP 600X). Though with some of the intermediate patches, I saw the behavior you are seeing (with 'off' status in fan/*/*, but showing 'on' in thermal_zone/*/* or in 'acpi -t'). Also there was some question there on whether exactly the right version of the patch got merged. See the discussions in <http://bugzilla.kernel.org/show_bug.cgi?id=5000>. Unfortunately I haven't kept testing it because my 600X's screen died, and its replacement (T60) doesn't export any fan control or trip points to ACPI (it's all done at a lower level, alas, so the damn fan is on way too much). -Sanjoy `Never underestimate the evil of which men of power are capable.' --Bertrand Russell, _War Crimes in Vietnam_, chapter 1. - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
