[Tfug] USB bugaboo on Thinkpads

[John Karns]

On Fri, Jun 13, 2008 at 5:25 PM, Claude Rubinson <rubinson at u.arizona.edu> wrote:
> On Fri, Jun 13, 2008 at 05:17:28PM -0700, John Karns wrote:
>> What model?
>
> T40.
>
>> > ThinkPads also suffer.  It's not actually the USB ports but, rather,
>> > something in the motherboard.  USB1 works but USB2 doesn't.  I tried
>> > (and failed) to get IBM to replace the motherboard so my eventual
>> > solution was to simply disable USB2, falling back to USB1.  Not a big
>> > deal for me as I don't use USB peripherals much but maybe a deal
>> > breaker for others.
>>
>> I haven't noticed a BIOS option on my machine to disable one or the other.
>
> Not in the bios but, rather, after boot via a `modprobe -r ehci_hcd`
> in my /etc/rc.local.

But how does unloading the driver disable just one port, rather than both?

-- 
John