Re: PROBLEM: unable to enumerate USB device on port 6 (3 kernel test)

[Franco Gastón Pellegrini]

hi again,

when i use the following workaround, the messeges stop spamming ttys
and usb keep working fine, Why? is hardware or kernel problem? (i know
a lot of people with the same problem):

Workaround:
Edit /etc/rc.local

Insert the following:

cd /sys/bus/pci/drivers/ehci_hcd
for i in `ls -d 0000:00:*`;do echo $i > unbind;sleep 5; echo $i > bind; done




2011/5/13 Franco Gastón Pellegrini <francogpellegrini@xxxxxxxxx>:
> I tested the kernels:
>
> 2.6.38-8-generic
> 2.6.39-0-generic (kernel-ppa/ppa)
>
> In all I have the same problem, except 2.6.35 and earlier versions,
> where no error occurs.
>
> I inform you that on my laptop is connected only integrated SD card
> reader (ACER 5520 with nForce 610M mother).
>
>
> ---------- Forwarded message ----------
> From: Franco Gastón Pellegrini <francogpellegrini@xxxxxxxxx>
> Date: 2011/5/3
> Subject: PROBLEM: unable to enumerate USB device on port 6
> To: linux-kernel@xxxxxxxxxxxxxxx
>
>
> Kernel version: 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24
> UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
>
> hi,
> I have an ACER 5520, with ubuntu 11.04 and all my TTY repeats
> indefinitly (every 1/3 seconds) the mesages:
>
> .....
> May 1 18:34:27 franco-Aspire-5520 kernel: [ 888.350128] hub 1-0:1.0:
> unable to enumerate USB device on port 6
> May 1 18:34:27 franco-Aspire-5520 kernel: [ 888.610230] hub 3-0:1.0:
> unable to enumerate USB device on port 6
> May 1 18:34:27 franco-Aspire-5520 kernel: [ 888.890098] hub 1-0:1.0:
> unable to enumerate USB device on port 6
> May 1 18:34:28 franco-Aspire-5520 kernel: [ 889.150111] hub 3-0:1.0:
> unable to enumerate USB device on port 6
> ....
>
> i cant use any TTY, how can i fix it? any kernel before do this for me.
>
> PD: what info do you need to complete my report?
>
> Excuse my english
>
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