[Solved] How to get fan sensors working?
from Telorand@reddthat.com to linux@lemmy.ml on 21 May 14:36
https://reddthat.com/post/41703166

I recently wiped Windows in favor of CachyOS, and it’s been lovely! However, I have one outstanding issue that I can’t seem to figure out.

To start, I have a Gigabyte B550I Aorus Pro AX motherboard. I followed the guide on the Arch Wiki for my particular chipset.

I still can’t seem to control my cooling fans.

No matter what I’ve tried, the only time the fan sensors get detected is when I also specify acpi_enforce_resources=lax in GRUB. From what I barely understand, that’s not an option you want to leave on permanently, but perhaps y’all know better or have other ideas.

If it helps:

Edit: I have a semi-solution.

sudo modprobe it87 force_id=0x8688 ignore_resource_conflict=1

…allows the module to load without completely changing the acpi policy. I still don’t know how to make it cleanly permanent or automated, but this is significant progress.

Also note that it should have been 0x8688 in my case, as revealed by sensors-detect.

Edit 2: Added

/etc/modules-load.d/it87.conf
it87

And

/etc/modprobe.d/it87.conf
options it87 force_id=0x8688 ignore_resource_conflict=1

And everything loads automatically! Thanks everyone!

#linux

threaded - newest

dr_jekell@lemmy.world on 21 May 15:26 next collapse

Have you done “sudo sensors-detect”?

Telorand@reddthat.com on 21 May 15:34 collapse

I did, but before I installed the modules. Do I need to also do it after?

umbrella@lemmy.ml on 21 May 16:19 collapse

yes.

Telorand@reddthat.com on 21 May 23:52 collapse

Unfortunately, this didn’t fix it, either before or after. sensors-detect can see the ITE chipset, but it says

Trying family 'ITE'...
Found unknown chip with ID 0x8688

After which it doesn’t find any modules to load for it, despite having a DKMS module installed that includes that chip.

(Also, I realize that I was using the incorrect ID before, but it seemed to work anyway.)

umbrella@lemmy.ml on 22 May 00:02 collapse

is this your issue? github.com/lm-sensors/lm-sensors/issues/154

make sure the version you are using includes it too.

Telorand@reddthat.com on 22 May 00:45 collapse

Thanks, sounds very similar to what’s going on with those users. I’ll look into that thread a little more

SteveTech@programming.dev on 21 May 21:58 collapse

You can try ignore_resource_conflict which is it87 specific, rather than a system wide acpi_enforce_resources.

modprobe it87 force_id=0x8628 ignore_resource_conflict=1

The reason why this is needed is ACPI claims the I/O ports required to talk to the it87, and Linux doesn’t want to override that.

[deleted] on 21 May 22:54 next collapse

.

Telorand@reddthat.com on 21 May 23:45 collapse

It worked, and I appreciate the explanation. I also realized I was using the wrong ID (which still worked, somehow); it should have been 0x8688.

I guess I can now figure out the best way to get that to run at startup or on login! Thanks again.

SteveTech@programming.dev on 22 May 22:00 collapse

Epic!

You should be able to add options it87 force_id=0x8688 ignore_resource_conflict=1 to /etc/modprobe.d/it87.conf (or whatever filename) and it87 to /etc/modules. To get it to run at startup.

Telorand@reddthat.com on 22 May 22:30 collapse

Tried it, and it works! Loads at startup, and I don’t have to reload the CoolerControl daemon or do any other manual intervention.

Thanks!