disabling a CPU increases laptop power consumption
Bug #54601 reported by
Allison Karlitskaya
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
linux-source-2.6.15 (Ubuntu) |
Invalid
|
Low
|
Unassigned | ||
linux-source-2.6.17 (Ubuntu) |
Invalid
|
Low
|
Unassigned |
Bug Description
Binary package hint: linux-source-2.6.15
This is a bit weird.
On my quest to improve battery performance on my laptop I learned about CPU hotplugging and how to take CPUs offline.
When I echo '0' to the online file for my CPU1 power use actually _increases_. I assume this to be caused by CPU1 running an (effective) busy loop once it goes offline but I am unable to confirm.
It would be nice if the CPU halted when taken offline. Disabling the second core of dualcore laptops would be a nice powersavings feature if it worked.
Changed in linux-source-2.6.17: | |
importance: | Untriaged → Low |
status: | Unconfirmed → Confirmed |
Changed in linux-source-2.6.15: | |
importance: | Untriaged → Low |
status: | Unconfirmed → Confirmed |
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Bug is in edgy kernel too.