USB hotplugging does not work on all machines anymore

[James Wilkinson]

Markus Huber wrote:
> Thank you for that advice. Plugging in the IDE-USB-disk it reads:
> 
> Mar 15 06:44:37 localhost kernel: usb 1-3: new high speed USB device 
> using address 2
> Mar 15 06:44:38 localhost pam_timestamp_check: pam_timestamp: `/' owner 
> UID != 0Mar 15 06:44:42 localhost kernel: usb 1-3: control timeout on ep0out
> Mar 15 06:44:43 localhost pam_timestamp_check: pam_timestamp: `/' owner 
> UID != 0Mar 15 06:45:18 localhost last message repeated 7 times
> Mar 15 06:46:23 localhost last message repeated 13 times

A couple of random things you might try:

Have you tried all your USB ports? Occasionally, the ports on the
backplane (near the keyboard and mouse PS/2 ports) work better than
those on the front of the machine.

Try, as root, running
/sbin/rmmod ehci
before plugging the disk in. This downgrades the kernel to USB 1.1, but
solves some issues.

James.

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