Intermittent Popping/Knocking Noise

Hi,

I occasionally hear an odd popping/knocking noise from my laptop. It happens only once per few minutes and is very quiet. It seems to happen more during boot. Sometimes there are long periods without the noise.

Here is a sample:

Does anyone else hear a similar noise? Does it indicate something is wrong with the laptop or should I just enjoy the chirp?

I have a batch 1 laptop and have applied the tape for the touchpad and adjusted the EMI stickers per the known issues thread. This is the only hardware related thing I’m still having.

Thanks!

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Sounded almost like a mechanical drive head parking…but of course that’s not the case here.

Give Framework Support a shout, see if they can help you identify the source and cause of this.

(p.s. The only two things that should make any noise are the speakers and fan)

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I’ve been noticing the same thing. I’ve just emailed support as well.

Ah. I have discovered the source of the noise I’ve been hearing. It’s made by a combination of the power supply and the fan itself, every time the fan starts. So only when the CPU load is low enough to let the fan stop… eventually enough heat builds up that it starts again.

Oooh…funky. I wonder what the fan blades are catching on…

They’re not catching on anything. Who said the fan blade were hitting anything?

Then what’s making the noise? Purely electrical? Or from mechanical movements?

I think it’s a pulse width modulation-related “chirping” noise from the fan. Especially audible at low speeds, or when the fan turns on and turns off right away. I hear a faint chirp occasionally on my Framework laptop too, but it’s not loud enough or frequent enough to be bothersome.

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Thanks for the lead on it being a fan issue!

I just noticed nrp’s response here

Perhaps this is the same noise and reason.

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Ah thank you for linking that thread; that very much does seem to be the same issue.

Yep, this is correct. It’s pulse stretching/PWM chirping as the fan figures out how to spin itself up. We’re not really happy with the behavior, and it’s something we plan to change the next time we source a fan. In the meantime, with 3.03 firmware we’ve reduced the extent that the fan spins up and down to make it more rare to hear the noise.

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Just wanted to add that with the latest firmware I have not been hearing the sound. It does a good job of ramping up the fan in a more efficient manner.

Great work team Framework!

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Just a note that the fan controller itself is has the same behavior since we can’t modify that, but we just cycle the fan much less often with the new firmware.

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I have noticed this as well