legousbtower kernel module

Bert Freudenberg bert at
Sat May 12 20:04:19 EDT 2012

On 07.05.2012, at 19:05, Paul Fox <pgf at> wrote:

> bert wrote:
>> On 07.05.2012, at 18:19, Paul Fox wrote:
>>> bert wrote:
>>>> Hi,
>>>> I'm trying to connect a LEGO RCX via the RCX 2.0 USB Tower. When plugging it 
>>>> in, it gets listed with name and vendor in the messages log. 
>>>> However, /dev/usb/lego0 is not created. The corresponding udev rule is 
>>>> installed by Fedora's "nqc" rpm, but it relies on the "legousbtower" kernel 
>>>> module.
>>>> AFAICT, it does not work because legousbtower.ko is missing.
>>>> This is both on an XO-1.5 (11.3.0) and a 1.75 (11.3.1). The latter at least 
>>>> creates an entry in /dev while plugged in, but it's a generic usb one. On 
>> the 
>>>> former I don't see any dev node created when plugging in.
>>>> Am I doing something wrong, or is it really just that the OLPC kernel is 
>>>> missing that module? If so, where can I get it? Or do I have to try 
>> compiling 
>>>> myself?
>>> i think the kernel is really missing that module.  i'd never heard
>>> of it until just now.
>>> i'll see if we can get an rpm built for 11.3.0 and 11.3.1.  (and 12.1.0)
>>> paul
>> Awesome! But the driver is in the regular kernel sources, right? Just not 
>> configured to be built?
> yes.
> paul
> =---------------------
> paul fox, pgf at

I installed (rpm -Uvh) this kernel on top of 883:

It booted fine, but the touchpad does not work, keyboard does, network does not, lego tower does not. 

Should I have done this differently? Any advice how to diagnose this, and get the machine working correctly again?


- Bert -

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