Hi Jordan, On Tue, 17 Apr 2007 11:23:44 -0400, Jordan wrote: > On Tue, Apr 17, 2007 at 10:33:59AM +0200, Jean Delvare wrote: > > I don't think that Jordan's CPU fan goes off. My understanding is that > > what Jordan qualifies as "on/off" is the BIOS option (no way to set > > temperature limits), not the fan behavior when the option is enabled. > > This is correct, it basically turns on/off the automatic fan speed > adjustments, it doesn't turn the fan off completely. I just want a way > to control the fan speed more precisely. > > > I don't understand why the manual mode doesn't work either, but the > > following things could probably be tried: > > > > * Jordan, you say you tried manual mode when the option was disabled in > > your BIOS. Can you try again when the option is enabled? If the BIOS > > does extra initialization when the option is on, it might make a > > difference. > > I have tried adjusting the PWM values with the bios option on/off and it > seemed to make no difference. > > > * You could try to dump the registers of the W83627DHG chip with the > > BIOS option off, and then again with the option on, and see if there > > are relevant differences. Make sure you do NOT let the w83627ehf driver > > load, though, as it could overwrite a few settings. Assuming that your > > chip is at the standard address (0x295) you can dump its contents with: > > > > isadump 0x295 0x295 > > > > If it lives at a difference address, adjust the command. > > I will have to try this out tonight when I have some more time. I will > post the results then. BTW, I tried this command now (albeit with the > module loaded) and it does return output. Is there any easy way to make > sure my chip is actually at this address? Let me correct a typo first: isadump 0x295 0x296 The actual address is printed by "sensors": w83627ehf-isa-0290 Adapter: ISA adapter (...) Add 5 and 6 to the base I/O address for the isadump parameters. > > * You could try leaving the option enabled in the BIOS, so the fan is > > in automatic mode, then check the value of all pwmN_enable files. If > > one has value >= 2, that should be the PWM output controlling your CPU > > fan. Then you can check the value of pwmN_target, and maybe change it > > to adjust the behavior. > > Whether it's enabled or disabled in bios, all the pwmN_enable files are > set to 1. That's really strange. The dumps will tell us more though. > > I seem to remember that the W83627DHG supports more fan control modes > > than the w83627ehf driver handles. > > Maybe there's still some hope then? I'm supposing it's possible my > motherboard is using a method which the driver just doesn't support in > it's current state. If these modes were in use, pwmN_enable would be 3 or more if I remember correctly. David knows the code better and should be able to confirm that. So it really looks like it's not what your system uses. -- Jean Delvare
