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.

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.

That latpop has a 13th gen CPU right? You can't undervolt on 12th gen and newer CPUs. It's hard locked in the bios because of a bug.

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

Dang it, that's sad. Thanks for responding anyway.

this trick sadly won't work anymore. they stopped using physical pins for VID for a while.

Intel-undervolt works on 4th through 10th gen Intel only.

My understanding is that certain security exploits were demonstrated through undervolting attacks like Plundervolt, so software voltage control was disabled or at least much more restricted on 11th gen onward.