Hi all, I am using a combo pccard (USB-2 and firewire) with VIA chipset to get USB-2 on my laptop.
But using linux I can't get it to work. I get usrp overruns, (uOuOuO) even with decimation factors of 200 when using usrp_rx_cfile.py This is only 320 ksamples/sec with top I see that the CPU is 80 % idle, so that is not the problem. When running benchmark_usb.py I get slightly better performance, 2 MB/sec works and 4 MB/sec works sometimes, all above fail. I don't know why benchmark_usb works better then usrp_rx_cfile. When I run usrp_wfm_rcv_nogui.py I get garbled sound and uO and aU, but this is logical. The script doesn't get enough data from the USRP. On windows usrp_rx_cfile.py just works fine with the same usb-2 card. (This is a much older gnuradio/usrp release though) Does anybody have a clue, what is wrong here. I tried both kernel 2.6.18 and 2.6.20. I also tried noacpi acpi=off apm=off as kernel-boot param. Or does anybody have a suggestion of an USB-2 addon card for a notebook (pccard) that works with the USRP. Greetings, Martin _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
