[GH-ISSUE #424] What registers affect fan speed on startup? (HP Probook 650 G1/G2 Win 10) #384

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opened 2026-02-26 00:32:29 +03:00 by kerem · 1 comment

kerem commented

2026-02-26 00:32:29 +03:00

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Originally created by @Daniol71 on GitHub (Jan 17, 2018).
Original GitHub issue: https://github.com/hirschmann/nbfc/issues/424

Hey, really impressed with the software so far even if it's not the easiest to use.

I have managed to set up my HP Probook 650 G2 using one of the configs for it here on GitHub (although it can be noted it also works with the 650 G1 config provided in the install).

My problem is: On startup and (sometimes) wake from sleep, the fans reset (perhaps to the system fan profile?) and I have to manually drag the slider to a low value (around 5%) then set the slider back to Auto to get the desired fan behaviour back. I think it might be related to the Register Write Configuration which is the only setting I haven't played around with.

Additionally: if you could give me the EC model numbers for the HP Probook 650 G1/G2 that would be highly appreciated, I haven't had any luck finding them myself. Then I could play around with the registers.

If I solve the issue I'll buy you a beer ;)

EDIT: Couldn't find the log files that are referenced here:

https://github.com/hirschmann/nbfc/wiki/Files-and-directories-overview

so I made my own using Process Monitor. Hopefully it's of some use.

Logfile - Copy.txt

Originally created by @Daniol71 on GitHub (Jan 17, 2018). Original GitHub issue: https://github.com/hirschmann/nbfc/issues/424 Hey, really impressed with the software so far even if it's not the easiest to use. I have managed to set up my HP Probook 650 G2 using one of the configs for it here on GitHub (although it can be noted it also works with the 650 G1 config provided in the install). My problem is: On startup and (sometimes) wake from sleep, the fans reset (perhaps to the system fan profile?) and I have to manually drag the slider to a low value (around 5%) then set the slider back to Auto to get the desired fan behaviour back. I think it might be related to the Register Write Configuration which is the only setting I haven't played around with. Additionally: if you could give me the EC model numbers for the HP Probook 650 G1/G2 that would be highly appreciated, I haven't had any luck finding them myself. Then I could play around with the registers. If I solve the issue I'll buy you a beer ;) EDIT: Couldn't find the log files that are referenced here: https://github.com/hirschmann/nbfc/wiki/Files-and-directories-overview so I made my own using Process Monitor. Hopefully it's of some use. [Logfile - Copy.txt](https://github.com/hirschmann/nbfc/files/1639536/Logfile.-.Copy.txt)

kerem

2026-02-26 00:32:29 +03:00

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kerem commented

2026-02-26 00:32:30 +03:00

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@github-actions[bot] commented on GitHub (Dec 4, 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 4, 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