Re: [b43] usb device disconnects automatically after 1s
From: Alan Stern
Date: Fri Mar 18 2011 - 21:38:40 EST
On Sat, 19 Mar 2011, Mihai DonÈu wrote:
> > Another thing you can try is to get usbmon traces under both 2.6.37 and
> > 2.6.38. Instructions are in the kernel source file
> > Documentation/usb/usbmon.txt.
> I'm unable to get a usbmon dump on 2.6.37. Strangely, the only USB device
> making noise (on 0u) is my mouse's wireless receiver. I had no such problem on
> 2.6.38 though.
I noticed your config has CONFIG_USB_EHCI_TT_NEWSCHED disabled. You
really should enable it (although I doubt that it is responsible for
this problem, since 2.6.37 works without it).
The 2.6.38 usbmon trace shows pretty much what you might expect: The
device connects and is initialized and enumerated normally, then 2
seconds later it disconnects. We really need to see a 2.6.37 usbmon
trace to compare for differences.
Can you try again? If usbmon isn't working, there's something _very_
strange going on.
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