Ubuntu
linux-source-2.6.22 package

  1. Bug #88746 (ehci-hcd)
  2. Comment #212

Comment 212 for bug 88746

Revision history for this message
Robert North (russetrob) wrote :

The following link contains important documentation for users & developers regarding this bug....
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/usb/power-management.txt;h=b2fc4d4a99177be7bd48dce560d1f28417c60aa9;hb=HEAD

This decsribes issues in the 2.6.24 kernel....
In short, so many USB devices don't autosuspend properly, that blacklisting them has been pushed to user-mode.
By default in the new kernel, autosuspend is disabled for everything but USB hubs.
Because they've left autosuspend enabled for USB hubs, and this may still be hitting some of us.
(Maybe that's what I've been seeing when running Hardy alpha2)