[Bug 42149] Re: USB devices are not powered off at shutdown (Dapper, 2.6.15)

[zsquareplusc]

here are more details about by hardware (lspci):
0000:00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2)
0000:00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3)
0000:00:02.0 0c03: 10de:005a (rev a2)
0000:00:02.1 0c03: 10de:005b (rev a3)

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USB devices are not powered off at shutdown (Dapper, 2.6.15)
https://launchpad.net/bugs/42149