[pvrusb2] read attempt on video device leads to error messages

[Mike Isely]

On Sun, 16 Oct 2005, Lars Schillingmann wrote:

> Am Samstag, 15. Oktober 2005 18:37 schrieb Mike Isely:
>> Experiment #1:
>>
>>    Unplug the PVR USB2 device
>>
>>    modprobe -r saa7115
>>    modprobe -r pcf8574
>>    modprobe -r pvrusb2
>>    modprobe saa7115
>>    modprobe pcf8574
>>
>>    Plug the device in.  Does it work?
>
> Works.
>
>> Experiment #2:
>>
>>    Unplug the PVR USB2 device
>>
>>    modprobe -r saa7115
>>    modprobe -r pcf8574
>>    modprobe -r pvrusb2
>>    modprobe pcf8574
>>    modprobe saa7115
>>
>>    Plug the device in.  Does it work?
>
> Does not work.
>
>> The only difference here is the order of loading of saa7115 and pcf8574.
>> You must make sure they're unloaded in order to affect their load order,
>> and we're unloading pvrusb2 as well just 'cause we're paranoid...  In
>> theory, one of those orders is going to work and the other will fail.
>> Have you tried this?
>
> You were right. I was quite sure i loaded the pcf driver before the pvrusb on
> my own test. But it seems i made a mistake.
>  -Lars

OK, thanks for trying this.  I completely understand the problem now.

   -Mike

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