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[GH-ISSUE #255] Current Fan Speed - Negative Value #227

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opened 2026-02-26 00:32:05 +03:00 by kerem · 5 comments

kerem commented

2026-02-26 00:32:05 +03:00

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Originally created by @MatthewPortman on GitHub (Jun 3, 2017).
Original GitHub issue: https://github.com/hirschmann/nbfc/issues/255

Hi,

I hope I'm not missing something but I've been unable to get nbfc to change the fan speed on my laptop. It's an HP Pavilion dv6 so I've been using the configuration file for it.

I've attempted to manually set the fan speed and also let it sit on auto to no avail. I'm very new to Linux so I apologize if I'm missing anything crucial!

Thanks

Here's the terminal readout after messing around with it a little bit:

/opt/nbfc#

mono nbfc.exe set -s 100
/opt/nbfc# mono nbfc.exe status -a
Service enabled : True
Read-only : False
Selected config name : HP Pavilion dv6
Temperature : 75

Fan display name : Fan #1
Auto control enabled : False
Critical mode enabled : False
Current fan speed : -64.29
Target fan speed : 100.00
Fan speed steps : 14

/opt/nbfc# mono nbfc.exe set -a
/opt/nbfc# mono nbfc.exe status -a
Service enabled : True
Read-only : False
Selected config name : HP Pavilion dv6
Temperature : 81

Fan display name : Fan #1
Auto control enabled : True
Critical mode enabled : False
Current fan speed : -64.29
Target fan speed : 20.00
Fan speed steps : 14

Originally created by @MatthewPortman on GitHub (Jun 3, 2017). Original GitHub issue: https://github.com/hirschmann/nbfc/issues/255 Hi, I hope I'm not missing something but I've been unable to get nbfc to change the fan speed on my laptop. It's an HP Pavilion dv6 so I've been using the configuration file for it. I've attempted to manually set the fan speed and also let it sit on auto to no avail. I'm very new to Linux so I apologize if I'm missing anything crucial! Thanks Here's the terminal readout after messing around with it a little bit: > /opt/nbfc# > mono nbfc.exe set -s 100 > /opt/nbfc# mono nbfc.exe status -a > Service enabled : True > Read-only : False > Selected config name : HP Pavilion dv6 > Temperature : 75 > > Fan display name : Fan #1 > Auto control enabled : False > Critical mode enabled : False > Current fan speed : -64.29 > Target fan speed : 100.00 > Fan speed steps : 14 > > /opt/nbfc# mono nbfc.exe set -a > /opt/nbfc# mono nbfc.exe status -a > Service enabled : True > Read-only : False > Selected config name : HP Pavilion dv6 > Temperature : 81 > > Fan display name : Fan #1 > Auto control enabled : True > Critical mode enabled : False > Current fan speed : -64.29 > Target fan speed : 20.00 > Fan speed steps : 14

kerem

2026-02-26 00:32:05 +03:00

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kerem commented

2026-02-26 00:32:06 +03:00

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@shanemeagher commented on GitHub (Aug 10, 2017):

Using 1.5.3-beta release, I'm having a similar issue under Windows 10 on a HP Pavilion DV6-3042tx. The 'HP Pavilion dv6' config is selected.

When switching to Read-only mode, the fan speed displays a negative. It seems to work okay when set to Enabled though with the correct fan speed displayed and the fan reacting to manual changes.

If more info is needed, let me know what logs / commands to run.

@shanemeagher commented on GitHub (Aug 10, 2017): Using 1.5.3-beta release, I'm having a similar issue under Windows 10 on a HP Pavilion DV6-3042tx. The 'HP Pavilion dv6' config is selected. When switching to Read-only mode, the fan speed displays a negative. It seems to work okay when set to Enabled though with the correct fan speed displayed and the fan reacting to manual changes. ![image](https://user-images.githubusercontent.com/2144292/29167145-d7b210e4-7dfb-11e7-80c2-6967373c1154.png) ![image](https://user-images.githubusercontent.com/2144292/29167122-c5a6a7b6-7dfb-11e7-9393-b8f0cd75536f.png) If more info is needed, let me know what logs / commands to run.

kerem commented

2026-02-26 00:32:06 +03:00

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@hirschmann commented on GitHub (Aug 10, 2017):

There are many different HP Pavilion dv6 models.
If none of the configs which come with NBFC works, try to create one yourself: https://github.com/hirschmann/nbfc/wiki/How-to-create-a-NBFC-config

@hirschmann commented on GitHub (Aug 10, 2017): There are many different HP Pavilion dv6 models. If none of the configs which come with NBFC works, try to create one yourself: https://github.com/hirschmann/nbfc/wiki/How-to-create-a-NBFC-config

kerem commented

2026-02-26 00:32:06 +03:00

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@EuphoriaCelestial commented on GitHub (Mar 25, 2019):

It show negative number on my HP ZBook 15 too, when the laptop is cool and fan not running (or not run fast, because I cant hear noise and cant feel air-flow comes out)

@EuphoriaCelestial commented on GitHub (Mar 25, 2019): It show negative number on my HP ZBook 15 too, when the laptop is cool and fan not running (or not run fast, because I cant hear noise and cant feel air-flow comes out)

kerem commented

2026-02-26 00:32:06 +03:00

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@github-actions[bot] commented on GitHub (Dec 11, 2019):

This issue is stale because it has been open more than 180 days with no activity. If nobody comments within 7 days, this issue will be closed

@github-actions[bot] commented on GitHub (Dec 11, 2019): This issue is stale because it has been open more than 180 days with no activity. If nobody comments within 7 days, this issue will be closed

kerem commented

2026-02-26 00:32:06 +03:00

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@RubenNL commented on GitHub (Apr 2, 2022):

For anyone else finding this: This might be because the BIOS option "fan always on when charger is plugged in" is on. You might want to try to disable it.

@RubenNL commented on GitHub (Apr 2, 2022): For anyone else finding this: This might be because the BIOS option "fan always on when charger is plugged in" is on. You might want to try to disable it.