Power drain
Hi forum,
great to be here. I have been using Kubuntu for three years and I very much like it. It is a very good alternative to Win11.
I have an issue related to power drain.
Computer is Lenovo X1 Yoga Gen8, brand new (the model is a few years old, but this unit is brand new). Intel 1345U CPU, 32 GB ram, no graphics card, no peripherals.
Had Win11 from factory. Now installed Kubuntu (24.04.01LTS). Not dual boot.
Sleeps with a very high power drain, like loss of 70% battery overnight. The battery is new and healthy. Even if I close all apps prior to putting this beast to sleep, power drains fast in sleep.
I have tried Powertop, TLP to no avail.
BIOS/UEFI settings are very limited; I can't tweak anything related to power, power states, PCIe policy, AHCI etc.
Strangely, if I do cat /sys/power/mem_sleep I only see s2idle (would have liked to see "deep" there). But even so, I think s2idle should not drain this much battery.
Updating Grub with "mem_sleep_default=deep" and rebuilding the Grub config does not do anything (should only work if deep was an option from cat /sys/power/mem_sleep, right?)
Tried installing with and without LUKS encryption, no difference.
What are my options here to sleep without draining battery this fast?
If a hardware component is somehow draining battery, how do I identify it (ideally some approach better than powertop) and would there be anything to do about it?
The system did not drain battery this fast when Win11 was briefly installed.
I am fully aware that power usage etc is not as much optimised in Linux/Kubuntu as in Windows and I do not expect same figures for power drain, but I do think that 70% drain overnight is excessive here. Any suggestions?
Many thanks in advance.
HB
great to be here. I have been using Kubuntu for three years and I very much like it. It is a very good alternative to Win11.
I have an issue related to power drain.
Computer is Lenovo X1 Yoga Gen8, brand new (the model is a few years old, but this unit is brand new). Intel 1345U CPU, 32 GB ram, no graphics card, no peripherals.
Had Win11 from factory. Now installed Kubuntu (24.04.01LTS). Not dual boot.
Sleeps with a very high power drain, like loss of 70% battery overnight. The battery is new and healthy. Even if I close all apps prior to putting this beast to sleep, power drains fast in sleep.
I have tried Powertop, TLP to no avail.
BIOS/UEFI settings are very limited; I can't tweak anything related to power, power states, PCIe policy, AHCI etc.
Strangely, if I do cat /sys/power/mem_sleep I only see s2idle (would have liked to see "deep" there). But even so, I think s2idle should not drain this much battery.
Updating Grub with "mem_sleep_default=deep" and rebuilding the Grub config does not do anything (should only work if deep was an option from cat /sys/power/mem_sleep, right?)
Tried installing with and without LUKS encryption, no difference.
What are my options here to sleep without draining battery this fast?
If a hardware component is somehow draining battery, how do I identify it (ideally some approach better than powertop) and would there be anything to do about it?
The system did not drain battery this fast when Win11 was briefly installed.
I am fully aware that power usage etc is not as much optimised in Linux/Kubuntu as in Windows and I do not expect same figures for power drain, but I do think that 70% drain overnight is excessive here. Any suggestions?
Many thanks in advance.
HB
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