[Hackrf-dev] hackrf_open() failed: HACKRF_ERROR_LIBUSB

[Chris Hallinan]

On Thu, Mar 19, 2015 at 9:17 AM, Dominic Spill <dominicgs at gmail.com> wrote:
> On 19 March 2015 at 12:16, Chris Hallinan <challinan at gmail.com> wrote:
>>
>> Hmm, I'm using kernel 3.12, definitely no hackrf module, but I still
>> can generate the same error simply by issuing hackrf_info in a short
>> loop.
>
> Yes, this is unrelated to the looping issue, it just presents the same
> error message (i.e. it can't connect to the HackRF).
>
>> Once the error happens, it is permanent.  Unplugging and replugging
>> the USB cable resolves it.
>
> I'm fairly certain this is related to the way that linux or libusb
> handle the repeated opening and closing of a device.
>
> Is there a reason that you need to open and close the device often?

No, I don't need that capability for what I'm doing now, I was just
trying to add my info to the discussion because obviously the issue
isn't resolved. Yes, it is likely either in libusb or the usb kernel
driver(s) but I don't have any specific knowledge of that stack.

Thanks,

Chris



-- 
Life is like Linux - it never stands still.