Release Notes for Ubuntu

  1. Bug #522998
  2. Comment #6

Comment 6 for bug 522998

Revision history for this message
Martin Spacek (mspacek) wrote : Re: XHCI (USB 3.0) Module Prevents Suspend

Following the advice of http://www.thinkwiki.org/wiki/Category:W510, I unloaded the xhci module by adding the line:

SUSPEND_MODULES="xhci"

to the file /etc/pm/config.d/unload_modules. That file didn't exist, so I had to create it. Now I can suspend and hibernate fine, although only once. After that, I'm hit by bug #532374.

Strangely enough, even with xhci unloaded, I can still plug an external mouse into either of the two blue USB 3.0 SuperSpeed ports on the left side of the machine, and the mouse works. Haven't tried suspending with the mouse plugged in though.. I guess it works because those ports run in USB 2.0 mode when a USB 2.0 device is plugged in?