Hi Anders, On Thu, 24 Mar 2011 18:23:08 +0100, Anders Kullenberg wrote: > Hi Jean, > > > -----Ursprungligt meddelande----- > > Från: Jean Delvare [mailto:khali@xxxxxxxxxxxx] > > Skickat: den 24 mars 2011 09:40 > > Till: Anders Kullenberg > > Kopia: 'Luca Tettamanti'; 'LM Sensors' > > Ämne: Re: extreme fan rpms with atk0110 > > > > Boot parameters typed on the grub command line are only for the current > > boot. If you want them to be permanent, you have to edit the grub > > configuration files instead. > > I did added GRUB_CMDLINE_LINUX="acpi_enforce_resources=lax" to > /etc/default/grub and ran update-grub2 > That added it to the grub.cfg file for me. Does not that mean that it should > stick after reboot? I'm not familiar with grub2, but yes, it certainly looks like it should stick after reboot. > > (...) > > Please provide the output of the following command: > > # isadump 0xd05 0xd06 > > akullen@ubuntu64:~$ sudo isadump 0xd05 0xd06 > [sudo] password for akullen: > WARNING! Running this program can cause system crashes, data loss and worse! > I will probe address register 0xd05 and data register 0xd06. > Continue? [Y/n] y > 0 1 2 3 4 5 6 7 8 9 a b c d e f > 00: 19 00 ff 03 00 00 00 00 00 80 7f 3b 07 80 ff ff You can see the value of register 0x0c: 0x07. This means fan1, fan2 and fan3 in 16-bit mode. > > This will show the IT8712F hardware monitoring registers, and in > > particular register 0x0c which contains the 8/16-bit fan configuration > > bits. Luca says that the ATK0110 code expects them to be set to 8-bit. According to Luca, the ATK0110 code on this board expects all fans to be in 8-bit mode (which according to the IT8712F datasheet is the default, but the datasheet isn't necessarily correct on this.) I don't know who enabled 16-bit mode... undocumented hardware default, faulty BIOS, Linux kernel driver (the it87 driver would, but is normally not allowed to load on ATK0110-enabled machines)? But certainly the atk0110 driver would work fine if we the register value was reverted to 8-bit mode. So you could do the following: * Unload the it87 driver if it is loaded. * Temporarily comment out the fan compute statements in the asus_atk0110 section of your libsensors configuration file. * As root, run: # isaset 0xd05 0xd06 0x0c 0x00 0x07 This will set fan1, fan2 and fan3 to 8-bit mode. * Load the asus_atk0110 driver if it's not already loaded. * Check the fan speeds. I expect them to be back to normal. Now there is a potential problem: the datasheet for the revision J of the IT8712F (which is the one you have) does _not_ list fan clock divisor register which 8-bit fan mode needs. If the register in question is really no longer implemented in the hardware, this makes the 8-bit fan mode pretty much useless, as speeds below ~2650 RPM can't be monitored. So, here's my theory: I think Asus has been using the previous revision (I) of the IT8712F for this board originally, and it supported 8-bit fan mode just fine, and they wrote their BIOS for it. Then ITE upgraded their line to revision J and Asus used this as a replacement of the revision I, without realizing it wasn't fully compatible. Now they may have two variants of the board in the wild. > (...) > Also found this in the logs > messages:Mar 21 22:18:38 ubuntu64 kernel: [ 6.528399] it87: Found IT8712F > chip at 0xd00, revision 8 > messages:Mar 21 22:18:38 ubuntu64 kernel: [ 6.528413] it87: in3 is VCC > (+5V) > messages:Mar 21 22:18:38 ubuntu64 kernel: [ 6.528454] ACPI: resource it87 > [io 0x0d05-0x0d06] conflicts with ACPI region ECRE > [mem 0x00000d00-0x00000d1f 64bit pref window disabled] > > Is this something to worry about? No, this is expected. This is the I/O resource conflict which forces you to choose between asus_atk0110 and it87. -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
