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

Antti Palosaari crope at iki.fi
Mon Mar 23 12:06:51 CET 2009


Heinrich Langos wrote:
> On Mon, Mar 23, 2009 at 09:18:56AM +0100, Martin Emrich wrote:
>> 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

I think all (in recent 2 year or so) Windows drivers will support 
USB1.1. Windows driver is provided by Afatech, device manufacturers only 
adds correct USB IDs and IR-table for remote they are using. You can 
download this WHQL-driver from Afatech www-site and use it instead.

> 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?

I think yes. Usually we use SniffUsb2.0 sniffer in real Windows box or 
virtual box using Vmware (supports USB2.0).

> 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").

Linux driver supports PID-filtering (USB1.1). There is no any check in 
driver against firmware version used, PID-filter should be available 
always. For dual tuner devices there is no PID-filter for 2nd tuner and 
driver will disable 2nd tuner in that case if only USB1.1 port is available.

> 
> 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?

All AF9015 devices supports PID-filtering by HW. And both Windows and 
Linux driver supports also.

regards
Antti
-- 
http://palosaari.fi/



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