WX 4100, Fan Curve not accurate

[knuxyl]

Checklist

• The problem is not listed in the hardware support matrix as a known limitation
• I've included a debug snapshot if the issue is related to hardware configuration

Bug description

Fan is running about 20% faster than what the curve is set to. I've been watching it for 30 minutes and it never slows down. I tried changing some settings but it seems to give a consistent ~20% increase of set values to fan speed.

I was originally using amdgpufan service to control speeds through a configuration file and it worked as expected. I disabled the service, installed this, enabled the daemon, restarted, and have been experiencing this issue since.

LACT does control the fan successfully, just not correctly.

System info

LACT-sysfs-snapshot-20240423-072913.tar.gz

- LACT version: 0.5.4-release (commit 6dc3520)
- GPU model: AMD Radeon Pro WX 4100 (0x1002:0x67E3:0x0)
- Kernel version: 6.6.15-amd64
- Distribution: Debian Testing

[ilya-zlobintsev]

Did you take the screenshot with a curve at a different time than the snapshot? Because the snapshot has a different curve in the config (/etc/lact/config.yaml):

      curve:
        30: 0.0
        35: 0.2
        40: 0.4
        50: 0.6006192
        60: 0.7987616
        70: 1.0

Also, does the static speed setting work correctly?

[knuxyl]

Yeah it's from a different time. That config matches what it was set at the time. Ill have to check static speed later.

…

On May 4, 2024 12:13:32 PM CDT, Ilya Zlobintsev ***@***.***> wrote: Did you take the screenshot with a curve at a different time than the snapshot? Because the snapshot has a different curve in the config (`/etc/lact/config.yaml`): ``` curve: 30: 0.0 35: 0.2 40: 0.4 50: 0.6006192 60: 0.7987616 70: 1.0 ``` Also, does the static speed setting work correctly? -- Reply to this email directly or view it on GitHub: #311 (comment) You are receiving this because you authored the thread. Message ID: ***@***.***>

[Slater91]

I see the same with a WX 3100, except that there is a 15% discrepancy instead of 20%.

[sladiri]

I seem to have the same issue, using an RX6600XT (XFX Speedster SWFT 210 AMD Radeon RX 6600 Core).
Edit: tried static speed settings:
slider setting -> reported speed

• 60 -> 79
• 50 -> 69
• 40 -> 60
• 30 -> 49
• 25 -> 41
• 20 -> 35
• 15 -> 26 (both fans runnging)
• 12 -> 20 (both fans running)
• 10 -> 34 (one of two fans running)
• <=9 -> 0 (fans stopped)

Looks like the reported speed is also different when only one of two fans are running. I guess this is an edge case though.