I'm attempting to use a RTL-SDR stick on my BBB, but too many samples are being dropped to be stable. When running the test program rtl_test, a typical output is like this:
Sampling at 2048000 S/s. Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. Reading samples in async mode... lost at least 68 bytes real sample rate: 2048506 current PPM: 248 cumulative PPM: 248 real sample rate: 1613474 current PPM: -212171 cumulative PPM: -108885 lost at least 33108 bytes [snip] lost at least 33820 bytes lost at least 568 bytes real sample rate: 2231729 current PPM: 89712 cumulative PPM: -42138 real sample rate: 2047938 current PPM: -30 cumulative PPM: -31448 A perhaps telling dmesg output occurs when I start the test program: sched: RT throttling activated The same stick has no problem on my laptop and a Raspberry Pi. I'm running debian jessie and I tested kernel kernel versions 3.8.13-bone67, 3.14.23-ti-r34, and 3.18.0-rc5-bone1 which all had the problem. Any thoughts? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
