[maemo-developers] [maemo-developers] problems of Instalingl a usb camera for N770

[From: Frantisek Dufka]

Kuisma Salonen wrote:
> ext maemo-developers-bounces at maemo.org wrote:
> 
>> I just wanted to install  usb camera for N770,the model I used is the
>> Logetich quickcam pro4000,the driver is pwc.However
>> when I installed the module pwc.ko ,it says invalid format.Is there
>> anyone have isntalled a usb camera for N770?
>>
>> John
> 
> 
> Sound like same issue which is with kernel modules in general. Is the 
> module should be compiled against the same kernel which will load the 
> module. So the question is: is the module compiled against the same 
> kernel which is in your 770 (the default 770 kernel unless you have 
> replaced it with your own)?
> 
> You can find the kernel sources from maemo website with little digging 
> which you can use for compiling the module.
> 
> Another possible cause could be that the kernel module is not compiled 
> for ARM, which could happen as user mistake or if the kernel module 
> described above is delivered as a binary (just trying to take in account 
> every possible reason)... 100% sure the module is for ARM?
> 

And the third question is 'is the module compiled with same gcc version 
as the kernel in the device?'. I was bitten by this. I compiled source 
provided by nokia with default gcc 3.3 Everything went fine but I had 
same mesage when insmod-ing on the device. I had to recompile it with 
3.4 and that worked fine. It is described in the wiki.
http://maemo.org/maemowiki/HowTo_KernelCompilation

Frantisek