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Date: Sun, 04 Dec 2011 21:02:06 +0530
From: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
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To: Patrik Kullman <patrik.kullman@gmail.com>
CC: linux-kernel <linux-kernel@vger.kernel.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Steven Rostedt <rostedt@goodmis.org>,
        michal@ellpspace.math.ualberta.ca, Oliver Neukum <oneukum@suse.de>,
        "Rafael J. Wysocki" <rjw@sisk.pl>,
        Linux PM mailing list <linux-pm@vger.kernel.org>,
        "pavel@ucw.cz" <pavel@ucw.cz>,
        "len.brown@intel.com" <len.brown@intel.com>,
        Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: xhci_hcd: Runtime PM causes port to inactivate
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There is a very similar discussion going on at:
http://thread.gmane.org/gmane.linux.kernel/1222803

Cc'ing all the relevant people and mailing lists.

Regards,
Srivatsa S. Bhat

On 12/04/2011 04:47 PM, Patrik Kullman wrote:

> Issuing
> 
> echo auto > /sys/bus/pci/devices/0000:03:00.0/power/control
> 
> on my Asus Zenbook UX31E with a
> 
> 03:00.0 USB Controller: Fresco Logic Device 1009 (rev 02)
> 
> causes its USB3-port to become mostly disabled.
> 
> It does have a "Charger+" feature that allows it to charge cellphones
> etc even when turned off, and this feature works when power control is
> in "auto" mode.
> 
> In all other aspects, the port is turned off. It doesn't react to
> devices being inserted.
> 
> This does not feel like the desired behavior.
> 
> Also, suspend does not work without unbinding the xhci_hcd module, not
> sure if that is related.
> Computer will not suspend/resume unless the following script is used
> in /etc/pm/sleep.d:
> https://help.ubuntu.com/community/AsusZenbook#Suspend.2C_Hibernate.2C_Shut-down_and_Reboot
> 
> This behavior has not changed between 3.0 and 3.2-rc4+ that I've tried today.