From: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>
To: Bob Lees <bob-l+PWtdWbHAsG2Il/BtU0GPXRex20P6io@public.gmane.org>
Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
pumpkin-Mmb7MZpHnFY@public.gmane.org
Subject: Re: C2, C3 and bus master activity
Date: Thu, 21 Jul 2005 07:24:17 +0200 [thread overview]
Message-ID: <20050721052417.GA7849@elf.ucw.cz> (raw)
In-Reply-To: <200507192118.37528.bob-l+PWtdWbHAsG2Il/BtU0GPXRex20P6io@public.gmane.org>
Hi!
> In a word USB. I don't fully understand why, but if I disable USB then both
> my laptops will go into C3 or C4, with USB enabled stays in C2.
Misdesigned USB controllers do DMA all the time... I think it is
uhci-specific problem.
Pavel
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prev parent reply other threads:[~2005-07-21 5:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-19 18:50 C2, C3 and bus master activity pumpkin
[not found] ` <200507192050.28343.pumpkin-Mmb7MZpHnFY@public.gmane.org>
2005-07-19 20:18 ` Bob Lees
[not found] ` <200507192118.37528.bob-l+PWtdWbHAsG2Il/BtU0GPXRex20P6io@public.gmane.org>
2005-07-19 21:59 ` pumpkin
[not found] ` <200507192359.56553.pumpkin-Mmb7MZpHnFY@public.gmane.org>
2005-07-19 23:00 ` Janosch Machowinski
[not found] ` <42DD85F3.9050300-cGBD8117FJM@public.gmane.org>
2005-07-20 17:21 ` pumpkin
[not found] ` <200507201921.43576.pumpkin-Mmb7MZpHnFY@public.gmane.org>
2005-07-20 19:29 ` pumpkin
[not found] ` <42DEB3E8.6080601@tzi.de>
[not found] ` <42DEB3E8.6080601-cGBD8117FJM@public.gmane.org>
2005-07-21 17:31 ` pumpkin
2005-07-21 16:08 ` Volker Braun
2005-07-20 19:05 ` Johan Vromans
[not found] ` <m23bq98fir.fsf-KjnUIgV0B0bak1Ioo/c9IoRWq/SkRNHw@public.gmane.org>
2005-07-20 19:31 ` Bob Lees
[not found] ` <200507202031.38488.bob-l+PWtdWbHAsG2Il/BtU0GPXRex20P6io@public.gmane.org>
2005-07-20 19:56 ` Janosch Machowinski
2005-07-21 5:24 ` Pavel Machek [this message]
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