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Can't undervolt on laptop (lemmy.blahaj.zone)
submitted 2 weeks ago by to c/archlinux@lemmy.ml
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I have an HP ENVY Laptop 16-h1055cl. I was trying to use intel-undervolt to undervolt my laptop, but whenever I start the service, it fails with:

Oct 22 15:10:50 aurorabook systemd[1]: Starting Intel Undervolt Service...
Oct 22 15:10:50 aurorabook intel-undervolt[1773]: CPU (0): Values do not equal
Oct 22 15:10:50 aurorabook intel-undervolt[1773]: GPU (1): -0.00 mV
Oct 22 15:10:50 aurorabook intel-undervolt[1773]: CPU Cache (2): Values do not equal
Oct 22 15:10:50 aurorabook intel-undervolt[1773]: System Agent (3): -0.00 mV
Oct 22 15:10:50 aurorabook intel-undervolt[1773]: Analog I/O (4): -0.00 mV
Oct 22 15:10:50 aurorabook systemd[1]: intel-undervolt.service: Main process exited, code=exited, status=1>
Oct 22 15:10:50 aurorabook systemd[1]: intel-undervolt.service: Failed with result 'exit-code'.
Oct 22 15:10:50 aurorabook systemd[1]: Failed to start Intel Undervolt Service.

The values that "do not equal" is -100 mV. I've even reset my UEFI settings to no avail. Am I doing something wrong?

The whole reason I started this research on undervolting is because battery life has become far worse recently. With the NVIDIA GPU switched off using envycontrol, I get 8-10 W browsing and near 22 when watching a YouTube video using mpv.

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[–] 3 points 2 weeks ago (1 child)

I'm not gonna dig for it, but I once hardware overvolted a Pentium M laptop CPU by getting the pinout of the socket. I found pins that handled voltage and shunted them with a single thin strand of speaker wire. Bet you could do the inverse to get a hardware undervolt. It was fun, and I got an extra 500Mhz out of that Celeron. My age is showing

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