Re: [REGRESSION] usb devices don't wake up the system

[Maxim Levitsky <maximlevitsky@gmail.com>]

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On Sun, 2010-07-04 at 08:51 -0400, Alan Stern wrote:
> On Sun, 4 Jul 2010, Maxim Levitsky wrote:
> 
> > > Alan. thanks for saving me from another bisect...
> > > latest git tip works again.
> > 
> > I mean, I think that
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=48826626263d4a61d06fd8c5805da31f925aefa0
> > 
> > fixed the problem.
> 
> Ah, yes.  Well, I can't claim a lot of credit for that because I'm the 
> person who introduced the regression in the first place!  But at least 
> it's working okay now.
> 
> > > (of course I need to explicitly enable power/wakeup on the mouse), but I
> > > can live with that.)
> > > 
> > > 
> > > I want to note that I still need to enable wakeup in /power/acpi/wakeup
> > > to make USB mouse wakeup the system.
> > > This isn't a regression, but I thought that I don't need that anymore.
> 
> You shouldn't.  Which setting in /proc/acpi/wakeup needs to be enabled?

The wakeup GPE for UHCI controller which is connected to the mouse.

maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5$ cat /proc/acpi/wakeup 
Device	S-state	  Status   Sysfs node
SLPB	  S4	*enabled   
P32	  S4	*disabled  pci:0000:00:1e.0
UAR1	  S4	*disabled  pnp:00:0a
ILAN	  S4	*disabled  pci:0000:00:19.0
PEGP	  S4	*disabled  
PEX0	  S4	*disabled  pci:0000:00:1c.0
PEX1	  S4	*disabled  pci:0000:00:1c.1
PEX2	  S4	*disabled  pci:0000:00:1c.2
PEX3	  S4	*disabled  pci:0000:00:1c.3
PEX4	  S4	*disabled  pci:0000:00:1c.4
PEX5	  S4	*disabled  
UHC1	  S3	*enabled   pci:0000:00:1d.0
UHC2	  S3	*disabled  pci:0000:00:1d.1
UHC3	  S3	*disabled  pci:0000:00:1d.2
UHC4	  S3	*disabled  
EHCI	  S3	*disabled  pci:0000:00:1d.7
EHC2	  S3	*disabled  pci:0000:00:1a.7
UH42	  S3	*disabled  pci:0000:00:1a.0
UHC5	  S3	*disabled  pci:0000:00:1a.1
AZAL	  S3	*disabled  pci:0000:00:1b.0



maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5$ cd 5-1/
5-1:1.0/   driver/    ep_00/     power/     subsystem/ 
maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5$ cd 5-1/
maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5/5-1$ 
maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5/5-1$ 
maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5/5-1$ cat idVendor 
1241
maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5/5-1$ lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 003: ID 1241:1166 Belkin MI-2150 Trust Mouse
Bus 005 Device 002: ID 06a3:ff52 Saitek PLC Cyborg 3D Rumble Force Joystick
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
maxim@MAIN:/sys/bus/pci/devices/0000:00:1d.0/usb5/5-1$ 



Also, I tried to enable wakeup on the USB mouse using udev rule.

I did that rule for a test (very broad for testing):

SUBSYSTEM=="usb", ACTION=="add", ATTR{power/wakeup}="enabled"

I found that running udevd --debug confirms that it writes that attribute 
(Log of mouse attach attached :-). (I connected  it to different port now)

According to the log, udev does write 'enabled' to
/sys/devices/pci0000:00/0000:00:1a.0/usb3/3-2/power/wakeup

but:

maxim@MAIN:~$ cat /sys/devices/pci0000:00/0000:00:1a.0/usb3/3-2/power/wakeup
disabled


This looks like kernel bug.



I am not against the default of disabled wakeup, it fact I welcome that, 
but I think that udev rule should work to enable it back.

Best regards,
	Maxim Levitsky

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