Hi @oswald_carter That actually makes sense. On battery the CPU clocks down to save power, so that stuck process is eating a much bigger slice of a smaller pie. On AC it’s running at full speed so the same load does not consume as high a percentage of CPU.
So, it’s not really doing more work on battery, there’s just less headroom available on battery, so it shows up as 98% on one core. It may not be that one reason but that’s likely the reason.
You can see something a bit similar where my CPUs are max out on this device when it’s config to stay locked at 800 MHz even though it’s capable of 3600 MHz:
Did you apply that i915.enable_psr=0 option you mean? Or noticing something else?
And thanks for circling back here to follow up on this. 