Public bug reported:
Dell XPS 1330
Ubuntu Intrepid
Linux torkiano-laptop 2.6.27-11-generic #1 SMP Thu Jan 8 08:38:38 UTC 2009
x86_64 GNU/Linux
powertop is showing that scan_async is waking up the CPU 10 times per
second all the time with more recent kernels. Besides, there are new
culprits like <kernel IPI> : Rescheduling interrupts that didn't showed
up with previous kernels.
7,7% ( 30,5) <kernel IPI> : Rescheduling interrupts
1,0% ( 10,0) <kernel core> : scan_async (ehci_watchdog)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Fedora)
Importance: Unknown
Status: Unknown
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scan_async (ehci_watchdog) wakes up the CPU
https://bugs.launchpad.net/bugs/315362
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