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? > * 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. > 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. ----- End forwarded message -----
