Comment 9 for bug 936190

My motherboard has a nforce 790i SLI chipset and the bug affects me since Ubuntu 12.04 release (kernel 3.2) : my USB devices are still powered when I shutdown the machine. However, unplugging everything except the mouse and the keyboard makes them powering off.

3.0.0-16 to latest kernels are concerned. The diff between 3.0.0-15 and 3.0.0-16 is this commit : http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c61875977458637226ab093a35d200f2d5789787
Reverting it in a recompiled kernel may resolve the issue for concerned motherboards/chipsets.