PROBLEM: unable to enumerate USB device on port 6

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

What is connected to your Acer (laptop?) via USB? (include built-in card readers and bluetooth!)

I had my Acer TM660 laptop spit similar messages at some occasions because of aging contacts between card reader and mainboard. Taking off card reader, cleaning contacts and putting everything back together fixed the issue here.

On the other hand it should not prevent you from using your computer unless your keyboard was connected to that specific port (instead of being PS/2 internally).

Bruno