On Mon, 8 Nov 2010 19:13:54 +0200, Alexandros Diamantidis wrote: > * Luca Tettamanti [2010-11-08 13:53]: > > > atk0110-acpi-0 > > > CPU Fan Speed: 675000 RPM (min = 600 RPM) > > > > There's something wrong with the reading of this fan. Can you send me > > a copy of the DSDT table (/sys/firmware/acpi/tables/DSDT)? > > Oops, I hadn't noticed that! > > In fact, that fan speed is usually read correctly, but intermittently > jumps to some absurd value. I don't think it's a problem of the driver, > since I see this in the BIOS "system info" screen as well. This is a common problem when using external fan speed control solutions (potentiometers, fanbus and the like.) The degraded power signal makes it harder for the tachometer to sample the speed signal. I presume that some self-controlled fans could also suffer from the same problem, depending on the exact implementation. -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
