Currently I’m running Zorin OS 16. It’s based on Ubuntu 20.04 LTS.
I wanted to ensure this laptop sleeps as efficiently as possible. I got TLP working but another topic mentioned deep sleep too. So I followed these instructions and while it does seem to significantly reduce power consumption, it introduces another, easily reproducible problem on my configuration:
- Unplug the laptop.
- Close the lid long enough for the laptop to recognize it’s closed. a few seconds will do in my experience.
- Reopen it.
The CPU is now locked at 200 MHz. The effects are pretty predictable; it’s slow to respond. Even alt+tab or opening a terminal with a hotkey takes a few seconds.
The quick fix is to plug it back in for a second or two. Obviously, for actual laptop use, that fix isn’t always practical. So, I reversed the change from the instructions in the link, and I no longer have the issue.
Anybody else having issues with deep sleep? If so, have you found other fixes?