Date: Thu, 18 Oct 2007 13:38:46 -0700 From: "Kevin Oberman" <oberman@es.net> To: Barkley Vowk <bvowk@math.ualberta.ca> Cc: freebsd-acpi@freebsd.org Subject: Re: Thinkpad T42 USB remains powered when suspended Message-ID: <20071018203846.B21BF4500E@ptavv.es.net> In-Reply-To: Your message of "Thu, 18 Oct 2007 12:16:57 MDT." <20071018120825.J18787@3jane.math.ualberta.ca>
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--==_Exmh_1192739926_4976P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > > I've tried loading and unloading the module in rc.suspend/rc.resume. > > Any help with this would be greatly appreciated. USB and battery life with the current USB stack are mutually incompatible. I would suggest that you try HPS USB stack. I know that Hans and others are working to give birth to a really clean, efficient stack, but it won't show up until after 7.0. Aside from not turning off on suspend, the current stack will never allow your system to drop to any sleep state other than C1. This will really kill battery. You might also try adding 'hw.pci.do_power_nodriver="2"' to /boot/loader.conf. I simply don't build my kernel with USB and only load it when I need to. This may or may not be practical for you. I do run the HPS stack. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1192739926_4976P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFHF8RWkn3rs5h7N1ERAqrRAJ9F3jPBCcAUBBhwNZH/pWgNrUrjTQCdGWSG 2+En5Oj56/VeJLGksAbhI0I= =z1Em -----END PGP SIGNATURE----- --==_Exmh_1192739926_4976P--
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