linux-kernel - Re: 2.6.20-rc4: usb somehow broken

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Message-Id: <200701111828.02119.oliver@neukum.org>
Date:	Thu, 11 Jan 2007 18:28:01 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Prakash Punnoor <prakash@...noor.de>
Cc:	linux-kernel@...r.kernel.org, linux-usb-devel@...ts.sourceforge.net
Subject: Re: 2.6.20-rc4: usb somehow broken

Am Donnerstag, 11. Januar 2007 18:20 schrieb Prakash Punnoor:
> Hi,
> 
> I can't scan anymore. :-( I don't know which rc kernel introduced it, but this 
> are the messages I get (w/o touching the device/usb cable except pluggin it 
> in for the first time):
> 
> usb 1-1.2: new full speed USB device using ehci_hcd and address 4
> ehci_hcd 0000:00:0b.1: qh ffff81007bc6c280 (#00) state 4
> usb 1-1.2: configuration #1 chosen from 1 choice
> usb 1-1.2: USB disconnect, address 4
> usb 1-1.2: new full speed USB device using ehci_hcd and address 5
> usb 1-1.2: configuration #1 chosen from 1 choice
> usb 1-1.2: USB disconnect, address 5
> usb 1-1.2: new full speed USB device using ehci_hcd and address 6
> usb 1-1.2: configuration #1 chosen from 1 choice
> usb 1-1.2: USB disconnect, address 6
> usb 1-1.2: new full speed USB device using ehci_hcd and address 7
> usb 1-1.2: configuration #1 chosen from 1 choice
> usb 1-1.2: USB disconnect, address 7
> usb 1-1.2: new full speed USB device using ehci_hcd and address 8
> usb 1-1.2: configuration #1 chosen from 1 choice
> 
> 
> Shouldn't the ohci module handle the scanner? The scanner is connected through 
> a hub.

Therefore it goes to EHCI. Can you try a direct connection?

> I don't remember how 2.6.19 handled it, or whether I used some new exotic 
> setting which causes the breakage.

Could you try 2.6.19?

> Well, I'll test this week-end and upload more infos then. If you already have 
> some ideas in the meantime, let me know.

Please test with CONFIG_USB_DEBUG

	Regards
		Oliver
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