linux-kernel - Re: [GIT PATCH] USB patches for 3.9-rc1

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Date:	Fri, 22 Feb 2013 17:23:04 -0500
From:	Dave Jones <davej@...hat.com>
To:	Fabio Baltieri <fabio.baltieri@...aro.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	tianyu.lan@...el.com,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	linux-acpi@...r.kernel.org
Subject: Re: [GIT PATCH] USB patches for 3.9-rc1

On Fri, Feb 22, 2013 at 10:51:58PM +0100, Fabio Baltieri wrote:
 > On Fri, Feb 22, 2013 at 03:59:54AM -0500, Dave Jones wrote:
 > > On Thu, Feb 21, 2013 at 10:40:10AM -0800, Greg KH wrote:
 > > 
 > > It looks like every port on my laptop is powered down, as I can't
 > > even charge devices with it.
 > 
 > I have the same problem (and almost the same laptop, Thinkpad T430
 > here), all external USB ports without power - even the always-on one
 > :-).
 > 
 > The bug seems to be ACPI related, I bisected it down to this patch:
 > 
 > f95988d ACPI / scan: Treat power resources in a special way
 > 
 > In the dmesg I have some error like these:
 > 
 > ACPI: Power Resource [PUBS] (on)
 > ...
 > pci 0000:00:14.0: System wakeup disabled by ACPI
 > 
 > for the USB controllers in the broken kernel, there are some in your
 > dmesg too.  I'll try to come up with a fix for current mainline, but all
 > the acpi stuff is quite obscure to me and the patch does not revert
 > cleanly, maybe Rafael (in CC) has some idea!

Good find. I see the same thing.

[    0.930283] ACPI _OSC control for PCIe not granted, disabling ASPM
[    0.933527] pci 0000:00:14.0: System wakeup disabled by ACPI
[    0.935982] pci 0000:00:19.0: System wakeup disabled by ACPI
[    0.937898] pci 0000:00:1a.0: System wakeup disabled by ACPI
[    0.939835] pci 0000:00:1b.0: System wakeup disabled by ACPI
[    0.940700] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.EXP1._PRT]
[    0.942195] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.EXP2._PRT]
[    0.943737] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.EXP3._PRT]
[    0.944564] pci 0000:00:1c.2: System wakeup disabled by ACPI
[    0.966491] pci 0000:00:1d.0: System wakeup disabled by ACPI

I must have pulled in the acpi bits the same time as the usb pull,
because I don't recall seeing this problem before last night.

	Dave

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