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:
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