linux-kernel - Re: USB device PM oddity in 3.5

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Date:	Fri, 25 May 2012 10:27:56 -0400
From:	Josh Boyer <jwboyer@...hat.com>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	Lan Tianyu <tianyu.lan@...el.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	lantianyu1986@...il.com
Subject: Re: USB device PM oddity in 3.5

On Fri, May 25, 2012 at 02:08:26PM +0100, Matthew Garrett wrote:
> udev is being a little too aggressive in enabling autosuspend. I've just 
> sent a patch upstream, but here it is:

Aside from the small buglet in the rule below, this seems to solve the
issue.  I've booted Linus' tree as of this morning with a fixed udev and
initramfs and the keyboard and mouse are working well now.
> diff --git a/rules/42-usb-hid-pm.rules b/rules/42-usb-hid-pm.rules
> index d5d5897..fc44b94 100644
> --- a/rules/42-usb-hid-pm.rules
> +++ b/rules/42-usb-hid-pm.rules
> @@ -46,4 +46,10 @@ ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="04b3", ATTR{idProduct}=="4012
>  ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="14dd", ATTR{idProduct}="0002", TEST=="power/control", ATTR{power/control}="auto"
>  
>  # USB HID devices that are internal to the machine should also be safe to autosuspend
> +
> +ACTION=="add", SUBSYSTEM=="usb", SUBSYSTEMS=="usb", ATTRS{removable}=="removable", GOTO="usb_hid_pm_end"
> +ACTION=="add", SUBSYSTEM=="usb", SUBSYSTEMS=="usb", ATTRS{removable}=="unknown", GOTO="usb_hid_pm_end"        
> +
>  ACTION=="add", SUBSYSTEM=="usb", ATTR{bInterfaceClass}=="03", ATTRS{removable}=="fixed", TEST=="../power/control", ATTR{../power/control}="auto"
> +
> +LABEL="usb_add_pm_end"

LABEL should be "usb_hid_pm_end" here.

josh
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