Public bug reported:
My laptop was updated from 21.10 to 22.04 and has got much worse battery
work time (even about 30% or more). Standard Intel 11-gen with
integrated graphic, no external devices. Nothing special.
I'm looking into System Monitor and it looks, new release has various
processes, which are started quite regurarly and are enabling various
CPU cores. CPU usage is not high, but because it's regular and not done
on one core... well, it leads me to question - was somebody even started
thinking about it? Or just upgraded everything and was happy, that it's
working?
First of all it could be good to start something on next CPU cores only,
when previous one are too busy. I know, it's kernel scheduler thing. Big
problem.
About processes in idle mode (no keyboard and touchpad pressing, no usb
devices, no network, no sound playing, no camera enabled, nothing
started, really only desktop):
Xorg and gnome-shell - always doing something (+ shell is saving and
reading a lot from disk, which increases power usage too)
systemd-oomd - really? Started regularly, when I have even 20% RAM used.
There should be trigger saying "use it only when for example 80% RAM is
used"
i915_flip - don't know what do to with that. Have only laptop screen
snap-store and network manager - don't have network in this moment.
Really need to run it regurarly? it should be started, when network is
on
gsd-housekeeping - very often
snapd - even when I don't do anything
pulse - even when I don't have sound
update-notifier - what? even without network? this should be called
only, when normal updates are checked... and when I set "check for
updates daily" it should be called once a day only (or when network is
connected and last check was done more than 24 h ago)
I could give even much longer list and I could say "this is absolute
normal", but... 21.10 was much better. Could somebody take any device
and just start doing something about it ? CPU usage with spikes up to
20% in idle mode is not normal (earlier my powertop was showing about 50
events, now standard is 150 or 200)
Additionally it's not possible to enable automatic suspend in time
shorter than 15 minutes. Why? Why? Why?
PS. with development experience > 20 years I see, that somebody really
haven't looked on it from higher perspective (and now there is required
some project, in which it will be checked, how things are working
together).
PS2. well, this problem makes, that I need either to downgrade or move
to other distribution. And to clarify - I'm of course using various
power saving settings, like profile, etc. (installation and strategy
related to both versions are the same)
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1970036
Title:
Ubuntu 22.04 much worse in energy saving than 21.10
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