24.04 LTS update: battery on laptop drains

[Jeffrey Walton]

On Thu, Mar 20, 2025 at 9:17 PM Wade Smart <wadesmart at gmail.com> wrote:
>
> My main laptop - a Thinkpad E525 - has had no issues. I used it on Sunday,
> shut the lid around noon
> and opened it at 1930 today and it had 6% battery left off a full charge.
> That is good for this older unit.
> My mom has a Thinkpad P15S and after the update to the 24.04 LTS the
> battery can lose up to 30%
> in an hour. A friend of mine has a HP laptop that I put Kubuntu on and he
> think his battery has been
> draining far faster than before. What are some things I can look for with
> these battery issues?

Is the firmware up to date?

The firmware implements the ACPI, including deeper energy states like
S3, S4 and S5. The first thing to fix before chasing kernel and
userland software issues is the hardware. Make sure you are running
the latest firmware.

Jeff