Bug#677472: [3.1->3.2 regression] Immediate wake on suspend, associated with OHCI on MCP51
On Sun, 08 Jul 2012 17:28:25 -0700, Alan Stern <stern@rowland.harvard.edu>
wrote:
>> Removing my pen drive cleared CCS on [6].
>
> Okay, that explains that. More or less. Is this an old USB-1.1 pen
> drive? If it is USB-2.0 then I would expect it to connect to the EHCI
> controller, not the OHCI controller.
I don't know... Is there a way to know that? The device is a
Bus 001 Device 011: ID 0781:5406 SanDisk Corp. Cruzer Micro U3
That doesn't mean much by itself. But the lsusb output you included
confirms that the pen drive was running at high speed -- which means
that it should never have been connected to the OHCI controller at all.
Another mystery. It appears that your computer's USB hardware is kind
of funky.
Alan, take a look at this:
Bus# 2
`-Dev# 1 Vendor 0x1d6b Product 0x0001 Linux Foundation 1.1 root hub
|-Dev# 18 Vendor 0x046d Product 0xc05a Logitech, Inc. Optical Mouse M90
`-Dev# 19 Vendor 0x046d Product 0xc31d Logitech, Inc.
Bus# 1
`-Dev# 1 Vendor 0x1d6b Product 0x0002 Linux Foundation 2.0 root hub
`-Dev# 18 Vendor 0x0781 Product 0x5406 SanDisk Corp. Cruzer Micro U3
For some reason, my USB drive is now on EHCI!
What happens if you unplug only the keyboard, or only the mouse?
The only thing I can confirm for now is that with both disconnected
the system consistently suspends and that I have seen the system NOT
suspend with either one connected.
Having said that, I have also seen the system suspend, but I don't
quite trust these tests. I think I may have failed to make sure
the settings were appropriate for the test (wrong kernel or wakeup
disabled).
--
Octavio.
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