[vdr] power consumption, powertop and wakups per second with a af9015 device, vp7045, and various plugins

Heinrich Langos henrik-vdr at prak.org
Mon Mar 23 11:23:09 CET 2009


On Mon, Mar 23, 2009 at 09:18:56AM +0100, Martin Emrich wrote:
> 
> Heinrich Langos schrieb:
> 
> > I am pretty sure the Siemens stick doesn't filter PIDs. The easy way to
> > find out about that is to look at http://www.linuxtv.org/wiki/index.php/DVB-T_USB_Devices
> > and check if the device works with usb 1.1 or absolutely needs 2.0.
> 
> Hmm, I did't look at this page before. One more curious thing about my
> af9015 USB device is that it seems to support USB 1.1 under Windows with
> a special driver:
> 
> http://www.digittrade.de/shop/shop_content.php/coID/9

Interesting. May be worth reverse engineering. Does anybody know if running
windows in a virtualbox with USB pass-through allow to sniff the usb
traffic?

BTW: I didn't know that there was a manufacturer who made Linux support 
such a prominent feature. Nice!

> So I think it's just a question of the right firmware; the linux driver
> does not support hardware PID filters (the driver says something like
> "Found device in WARM state, disabling PID filter").

Mine says:

[27648.472519] dvb-usb: found a 'Afatech AF9015 DVB-T USB2.0 stick' in cold state, will try to load a firmware
[27648.472598] firmware: requesting dvb-usb-af9015.fw
[27648.500072] dvb-usb: downloading firmware from file 'dvb-usb-af9015.fw'
[27648.567057] dvb-usb: found a 'Afatech AF9015 DVB-T USB2.0 stick' in warm state.
[27648.567182] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
...

I don't know if it is just a question of the firmware, or if different 
sticks with the AF9015 come with support circuitry that may or may not
support PID filtering.

@Antti: Do you know?


Cheers
-henrik





More information about the vdr mailing list