From: Len Brown <lenb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Shaohua Li <shaohua.li-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Oliver Neukum <oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>,
Arjan van de Ven <arjan-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
"Zhang, Rui" <rui.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Zhao,
Yakui" <yakui.zhao-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org"
<bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org>,
"bugme-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org"
<bugme-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org>,
"linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"daniel.smoczyk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<daniel.smoczyk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"imrehg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<imrehg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [Bugme-new] [Bug 13145] New: Processor does not go below C2 if mouse (uhci) is plugged in.
Date: Wed, 22 Apr 2009 14:35:16 -0400 (EDT) [thread overview]
Message-ID: <alpine.LFD.2.00.0904221431330.6187@localhost.localdomain> (raw)
In-Reply-To: <20090422091247.GA28309-U5EdaLXB8smDugQYiPIPGdh3ngVCH38I@public.gmane.org>
> IIRC, C2-popup is supported since core architecture. The system (a T41)
> is unlikely support this.
The T41 is an ICH4M, Pentium M system.
C2 popup was not supported until ICH6M.
Thus, when USB is active, this system should detect bus master
activity (as displayed in /proc/acpi/processor/CPU/power)
and should not enter C3 when such activity is (recently) present.
Len Brown, Intel Open Source Technology Center
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next prev parent reply other threads:[~2009-04-22 18:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-13145-10286@http.bugzilla.kernel.org/>
[not found] ` <bug-13145-10286-V0hAGp6uBxO456/isadD/XN4h3HLQggn@public.gmane.org/>
2009-04-21 21:27 ` [Bugme-new] [Bug 13145] New: Processor does not go below C2 if mouse (uhci) is plugged in Andrew Morton
2009-04-21 21:40 ` Arjan van de Ven
2009-04-21 22:22 ` Oliver Neukum
2009-04-21 23:49 ` Arjan van de Ven
2009-04-22 8:48 ` Oliver Neukum
[not found] ` <200904221048.35180.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2009-04-22 9:12 ` Shaohua Li
[not found] ` <20090422091247.GA28309-U5EdaLXB8smDugQYiPIPGdh3ngVCH38I@public.gmane.org>
2009-04-22 18:35 ` Len Brown [this message]
[not found] ` <20090421142751.b030cba7.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-04-22 14:51 ` Alan Stern
2009-04-22 15:09 ` Daniel Smoczyk
[not found] ` <d7131a800904220809ha96c0e5rd366abfcbae4d1c2-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-04-22 16:39 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0904221050110.3405-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2009-04-22 17:36 ` Oliver Neukum
[not found] ` <200904221936.38942.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2009-04-22 22:54 ` Len Brown
[not found] ` <alpine.LFD.2.00.0904221848380.21119-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-04-22 23:53 ` [RFC PATCH] ACPI: delete obsolete "bus master activity" proc field Len Brown
2009-04-23 0:40 ` [Bugme-new] [Bug 13145] New: Processor does not go below C2 if mouse (uhci) is plugged in Len Brown
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