UME deep sleep time is not enough while idle
Bug #228559 reported by
Yu Ping
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Ubuntu Mobile Edition |
Confirmed
|
Medium
|
Unassigned |
Bug Description
Description:
using powertop to check the C state, and found that the deep state time is around 30ms, which is not long enough. Note: we have removed USB NIC, USB mouse etc.
the biggest 3 event is:
rescheduling interrupt <kenrel IPI> ( this event is not in moblin, and seems like the root cause?)
usb_hcd_
extra timer interrupt<
Reproduce Steps:
(1)remove USB NIC, USB mouse etc.
(2)using powertop to check the C state
Expected Result:
the deep C state should be longer
Changed in ubuntu-mobile: | |
importance: | Undecided → Medium |
status: | New → Confirmed |
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I'm experiencing the same thing on Ubuntu 8.04 "Hardy". No PCMCIA and no Yenta_socket.