Hi Jean Thanks for all your help! I think I will stop here. Bricking my motherboard to get the last fan reading isn't quite worth it. :) I think I will be purchasing a separate PWM fan controller, and connecting the fans to that. Then I should be able to do everything in software using fancontrol. Now I just need to find such a Linux-compatible PWM fan controller... /Rune On Sun, Feb 9, 2014 at 10:32 AM, Jean Delvare <khali@xxxxxxxxxxxx> wrote: > Hi Rune, > > On Fri, 7 Feb 2014 16:16:29 +0100, Rune Kjær Svendsen wrote: > > Hi Jean > > > > Sorry about the formatting :) I've enabled plain text mode in Gmail > > now (I hope that's sufficient). > > > > I actually just updated the BIOS a couple of days ago, so everything > > is up-to-date BIOS-wise. > > > > Enabling fan5 gives the following values, unfortunately: > > > > rune@rune-desktop:~$ cat /sys/class/hwmon/hwmon1/device/fan5_alarm > > 1 > > rune@rune-desktop:~$ cat /sys/class/hwmon/hwmon1/device/fan5_input > > 0 > > rune@rune-desktop:~$ cat /sys/class/hwmon/hwmon1/device/fan5_min > > -1 > > OK, no luck :-( > > > Here's a register dump after setting the registers to enable fan5: > > > > root@rune-desktop:~# isadump -y 0x295 0x296 > > 0 1 2 3 4 5 6 7 8 9 a b c d e f > > 00: 19 40 b7 02 00 00 00 00 00 80 58 0f 27 3e 0d e5 > > 10: 0c 6a 09 77 c7 00 00 00 04 03 03 fa 3d c3 c3 c3 > > 20: e5 e7 72 86 39 cd 10 19 8a 2a 23 80 80 c3 ad ad > > 30: af 65 69 da 32 ee 92 6d 87 be 4a 1a 6f 00 0a 57 > > 40: 6f f8 e7 68 63 85 5f 40 ad 6a d4 00 ff ff ff ff > > 50: 2f 18 7f 7f 7f 40 00 00 90 00 38 12 60 00 00 00 > > 60: 80 00 7f 00 00 41 00 ff 7f 7f 7f 80 00 00 00 ff > > 70: 80 00 7f 81 00 41 00 ff ff ff ff ff ff ff ff ff > > 80: 00 00 ff ff 00 00 00 00 00 00 00 00 00 27 02 0f > > 90: ff 00 00 00 ff 00 00 00 ff ff ff ff ff ff ff ff > > a0: ee 0b 0b 0b 0b 0b 0b ff ff ff ff ff ff ff ff ff > > b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > > c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > > d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > > e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > > f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > > So the setting was properly written to the register, but apparently the > pin in question has no fan wired to it. > > If you are ready to take some risk and think getting the third case fan > input is worth it, you can try enabling fan4. I say it is a bit more > risky because it involves changing the pin configuration. As we don't > know what this pin is actually used for and connected to, bad surprises > could happen. If you don't feel like doing it, just don't. > > If you want to try enabling fan4, do the following: > > # rmmod it87 > # isaset -f 0x2e 0x87 > # isaset -f 0x2e 0x01 > # isaset -f 0x2e 0x55 > # isaset -f 0x2e 0x55 > # isaset 0x2e 0x2f 0x07 0x07 > # isaset 0x2e 0x2f 0x26 0xb8 > # isaset 0x2e 0x2f 0x02 0x02 > (At this point you may double-check that value of register 0x26 was > properly changed, using "isadump -k 0x87,0x01,0x55,0x55 0x2e 0x2f > 0x07".) > # isaset 0x295 0x296 0x0c 0x37 # modprobe it87 > > You may or may not get the extra fan speed reading you were looking > for. If you don't, then I suggest you restore the original chip > configuration, by either cold booting the machine, or going through the > following sequence: > > # rmmod it87 > # isaset 0x295 0x296 0x0c 0x07 > # isaset -f 0x2e 0x87 > # isaset -f 0x2e 0x01 > # isaset -f 0x2e 0x55 > # isaset -f 0x2e 0x55 > # isaset 0x2e 0x2f 0x07 0x07 > # isaset 0x2e 0x2f 0x26 0x98 > # isaset 0x2e 0x2f 0x02 0x02 > # modprobe it87 > > Good luck :-) > > -- > Jean Delvare > http://jdelvare.nerim.net/wishlist.html > _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
