linux-kernel - Re: 2.6.25.1, stray noise in dmesg

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Date:	Fri, 2 May 2008 09:14:47 -0700
From:	Greg KH <greg@...ah.com>
To:	Gene Heskett <gene.heskett@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.25.1, stray noise in dmesg

On Fri, May 02, 2008 at 11:26:15AM -0400, Gene Heskett wrote:
> Greetings;
> 
> I just rebooted to 2.6.25.1, and was momentarily panic'd by the messages going by early in the boot, but on putting 2&2 
> together, found they were just noise.
> 
> >From dmesg:
> [root@...ote ~]# dmesg|grep unable
> [    2.093502] hub 1-0:1.0: unable to enumerate USB device on port 2
> [    2.248475] hub 1-0:1.0: unable to enumerate USB device on port 5
> [    2.454444] hub 1-0:1.0: unable to enumerate USB device on port 6
> And lsusb:
> [root@...ote ~]# lsusb
> Bus 001 Device 011: ID 04b8:010f Seiko Epson Corp. Perfection 1250
> Bus 001 Device 010: ID 046d:c510 Logitech, Inc.
> Bus 001 Device 009: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
> Bus 001 Device 008: ID 0409:0059 NEC Corp. HighSpeed Hub
> Bus 001 Device 007: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
> Bus 001 Device 006: ID 050d:0751 Belkin Components
> Bus 001 Device 002: ID 0409:0059 NEC Corp. HighSpeed Hub
> Bus 001 Device 001: ID 1d6b:0002
> Bus 003 Device 002: ID 0451:2046 Texas Instruments, Inc. TUSB2046 Hub
> Bus 003 Device 001: ID 1d6b:0001
> Bus 002 Device 003: ID 06a3:8021 Saitek PLC Eclipse II Keyboard
> Bus 002 Device 002: ID 04b8:0005 Seiko Epson Corp. Stylus Printer
> Bus 002 Device 001: ID 1d6b:0001
> 
> Indicating 3 empty ports, which is not correct either, but everything
> that is plugged in is accounted for.  However, if there is no device
> there, is it supposed to tell us?  In which case it should do that 2-3
> more times in dmesg.

That's because your hardware is trying to enumerate a device, yet there
really isn't one there at all.  Blame the hardware :)

This warning is new, but it's needed as we now notice if we fail to
enumerate a device that might really be there.

thanks,

greg k-h
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