From: Karol Kozimor <sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org>
To: Alexander Hoogerhuis <alexh-rpjHciJLgqZBDgjK7y7TUQ@public.gmane.org>
Cc: Ow Mun Heng <ow.mun.heng-Sjgp3cTcYWE@public.gmane.org>,
acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: Centrino question
Date: Wed, 26 May 2004 01:56:10 +0200 [thread overview]
Message-ID: <20040525235610.GA21791@hell.org.pl> (raw)
In-Reply-To: <1085527691.9167.39.camel-x1HDAq6LUf79HyLP1LL8ZA@public.gmane.org>
Thus wrote Alexander Hoogerhuis:
> I've been through tracking down what disables C3 on my laptop (HP
> nc6000). It all happens when the uhci-hci USB drviver goes in. When I
> queried about it on lkml a while back it was due tro some support
> lacking in the UHCI dirvers as of yet.
Whenever something is plugged into the controller, bus mastering kicks in
and C3 is effectively disabled, also on Windows. This is, to my best
knowledge, a limitation of the USB interface itself. As far as I know, at
least uhci-hcd driver in 2.6 suspends the controller when nothing is
plugged in, thus allowing to use C3. The situation might be different under
2.4.
Best regards,
--
Karol 'sziwan' Kozimor
sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org
-------------------------------------------------------
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next prev parent reply other threads:[~2004-05-25 23:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3ACA40606221794F80A5670F0AF15F8404622C57@PDSMSX403.ccr.corp.intel.com>
[not found] ` <20040520015748.776d5b84.neurowork@free.fr>
[not found] ` <1085111429.12352.563.camel@dhcppc4>
[not found] ` <1085111429.12352.563.camel-D2Zvc0uNKG8@public.gmane.org>
2004-05-21 12:56 ` Centrino question Cyril Wattebled
[not found] ` <20040521125637.33f69fc6.neurowork-GANU6spQydw@public.gmane.org>
2004-05-21 11:52 ` Karol Kozimor
[not found] ` <20040521115207.GA12775-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org>
2004-05-21 17:38 ` Ow Mun Heng
[not found] ` <1085161136.9856.5.camel-C9mHTC703ZUb5wn6fCfWY+TW4wlIGRCZ@public.gmane.org>
2004-05-21 18:48 ` Martin Hermanowski
[not found] ` <20040521184830.GG31690-lb+GC1uVkU0@public.gmane.org>
2004-05-21 19:27 ` Ow Mun Heng
2004-05-23 3:20 ` Len Brown
2004-05-25 23:28 ` Alexander Hoogerhuis
[not found] ` <1085527691.9167.39.camel-x1HDAq6LUf79HyLP1LL8ZA@public.gmane.org>
2004-05-25 23:56 ` Karol Kozimor [this message]
[not found] ` <20040525235610.GA21791-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org>
2004-05-27 20:52 ` Pavel Machek
2004-05-27 6:22 ` Len Brown
[not found] ` <1085638963.17693.71.camel-D2Zvc0uNKG8@public.gmane.org>
2004-05-28 20:27 ` Ow Mun Heng
2004-05-24 17:36 Dino Klein
-- strict thread matches above, loose matches on Subject: below --
2004-05-24 14:48 Yu, Luming
2004-05-23 20:33 Dino Klein
[not found] ` <BAY16-F76SQV6cerTPS0003d004-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org>
2004-05-23 21:54 ` Martin Hermanowski
[not found] ` <20040523215431.GD6330-lb+GC1uVkU0@public.gmane.org>
2004-05-23 22:25 ` Karol Kozimor
2004-05-24 16:46 ` Ow Mun Heng
[not found] ` <1085417218.12941.14.camel-C9mHTC703ZUb5wn6fCfWY+TW4wlIGRCZ@public.gmane.org>
2004-05-24 16:53 ` Arjen Verweij
[not found] ` <Pine.GHP.4.44.0405241853400.27939-100000-1JbLm1bU5j7YjFCvLzxXUyvJykC1LJ6w@public.gmane.org>
2004-05-24 17:08 ` Ow Mun Heng
2004-05-24 17:03 ` David Eriksson
2004-05-21 21:27 Nakajima, Jun
[not found] ` <7F740D512C7C1046AB53446D372001730177CF4E-exJ48ZlmiLpcIJlls4ac1rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2004-05-21 23:45 ` Ow Mun Heng
[not found] ` <1085183136.9856.253.camel-C9mHTC703ZUb5wn6fCfWY+TW4wlIGRCZ@public.gmane.org>
2004-05-23 3:22 ` Len Brown
[not found] ` <1085282554.12359.736.camel-D2Zvc0uNKG8@public.gmane.org>
2004-05-24 16:28 ` Ow Mun Heng
2004-05-21 18:08 Nakajima, Jun
[not found] ` <7F740D512C7C1046AB53446D372001730177CE7A-exJ48ZlmiLpcIJlls4ac1rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2004-05-21 18:17 ` Ow Mun Heng
[not found] ` <1085163473.9856.23.camel-C9mHTC703ZUb5wn6fCfWY+TW4wlIGRCZ@public.gmane.org>
2004-05-21 18:31 ` Bruno Ducrot
[not found] ` <20040521183113.GQ29214-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org>
2004-05-21 18:36 ` Ow Mun Heng
[not found] ` <1085164585.9856.31.camel-C9mHTC703ZUb5wn6fCfWY+TW4wlIGRCZ@public.gmane.org>
2004-05-21 18:47 ` Bruno Ducrot
[not found] ` <20040521184703.GR29214-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org>
2004-05-21 19:05 ` Ow Mun Heng
2004-05-21 11:42 Yu, Luming
[not found] ` <3ACA40606221794F80A5670F0AF15F84046AA243-SRlDPOYGfgogGBtAFL8yw7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2004-05-22 0:56 ` Cyril Wattebled
[not found] ` <20040522005658.640e1d91.neurowork-GANU6spQydw@public.gmane.org>
2004-05-23 3:24 ` Len Brown
[not found] ` <1085282649.12352.739.camel-D2Zvc0uNKG8@public.gmane.org>
2004-05-23 13:21 ` Cyril Wattebled
[not found] ` <20040523132122.6ba363b4.neurowork-GANU6spQydw@public.gmane.org>
2004-05-24 16:11 ` Ow Mun Heng
[not found] ` <1085415078.12941.2.camel-C9mHTC703ZUb5wn6fCfWY+TW4wlIGRCZ@public.gmane.org>
2004-05-25 7:27 ` Stefan Seyfried
2004-05-10 2:27 Yu, Luming
2004-05-09 18:25 Cyril Wattebled
[not found] ` <20040509182524.03a9de0d.neurowork-GANU6spQydw@public.gmane.org>
2004-05-09 17:51 ` Dino Klein
[not found] ` <409E6F91.8090506-zY4eFNvK5D9If6P1QZMOBw@public.gmane.org>
2004-05-10 0:28 ` Cyril Wattebled
[not found] ` <20040510002814.67f2022a.neurowork-GANU6spQydw@public.gmane.org>
2004-05-21 16:37 ` Bruno Ducrot
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