[linux-dvb] Re: cinergyT2: which kernel/usb module to use?

[Holger Waechtler <holger@qanu.de>]

Johannes Stezenbach wrote:

> Stefan Lucke wrote:
>  
> > I'm trying to my cinergyT2 to work with kernel 2.6.7 on an epia board.
> > Using ehci I got only error messages, so I tried uhci.
> >    
> The cinergyT2 only works with USB2, so you need ehci_hcd. Every
> USB2 controller also has a USB1.1 companios controller for
> backwards compatibility, so you also need uhci_hcd or ohci_hcd.
>  
yes, you need to load need both drivers for high-speed transfers. The 
kernel-config is somewhat misleading by allowing to enable EHCI without 
UHCI or OHCI (even if the driver is not able to do anything useful then...).

> > When loding uhci the blue led of the device went off.
> >    
> My cinergyT2 works fine here (2.6.10-rc2 + current dvb-kernel CVS).
>
> There's a bug in the cinergyT2 frontend code when prevents it from
> working with VDR, though (no frontend events).
>  
do you have an idea what exactly causes the problem? poll() is 
implemented, the poll waitqueue should get woken up whenever the status 
bits change. A quick view over the code did not showed anything obvious 
wrong, do you have a simple testcase discovering the problem?

Holger