Messages in this thread | | | Date | Mon, 1 Nov 2021 13:54:21 +0100 | Subject | Re: Thorsten is tracking regression again and could need a little help (was: Re: Linux 5.15) | From | Thorsten Leemhuis <> |
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On 01.11.21 12:46, Idzibear wrote: > https://www.reddit.com/r/linux/comments/qjyxso/the_515_kernel_has_been_released/hitiykt/ > > I just noticed something strange. I'm experimenting with some repurposed > Desktop-PC to make it maybe into a homelab server. > > I ran Kernel 5.14.10, and I had an idle usage of 19-22 watts. Updated to > 5.15 and it went to 27-29 watts. Went back to 5.14.10 and it went down > to 19-22 watts again. WTF?
thx for the report, yeah, sound like a regression. With that much of a difference I'd suspect it's something that can consume a lot of power if not sleeping properly, for example the CPU or the GPU. But that's just a shot in the dark and it's hard to help here with debugging from a distance (especially without a list of hardware components). With a bit of luck tools like powertop might be able to debug this (check if the CPU is sleeping well). But a 'git bisect', like already suggested Gregkh, would be really the best to find the change that's causing this.
Ciao, Thorsten
#regzbot ^introduced: v5.14..v5.15 #regzbot title: idle power increased from ~20 to ~28 watts
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