[Hackrf-dev] Connect USB - Reset Required

[Dominic Spill]

Hi James,

There are a couple of reasons that you might require a reset when
connecting your HackRF.

1) USB power saving - this is enabled by default on many laptops and causes
some issues with a device that has previously been connected.  You can
disable this by following instructions here:
https://github.com/mossmann/hackrf/wiki/FAQ#power-saving-and-usb-autosuspend

2) There was an issue with start up on some boards that caused them not to
come up first time.  It primarily affected HackRFs from a specific
manufacturing run and we were able to fix it in software.  The fix was
included in our 2018.01.1 release here:
https://github.com/mossmann/hackrf/releases/tag/v2018.01.1
The fix is the only change between the 2017.02.1 and 2018.01.1 releases, so
you can grab the binary firmware from the release archive and flash it
without having to update your host tools.

If you want to know more about the second issue, Mike wrote an in depth
blog post on it:
https://greatscottgadgets.com/2018/02-28-we-fixed-the-glitch/

There could be other issues affecting your system, but these are the two
that spring to mind immediately.

Thanks,
  Dominic

On Fri, 14 Sep 2018 at 12:38, James Brown <Jim at seti.net> wrote:

> Is there any reason a push of the reset button should be required when
> connecting to the USB system?
> Would a firmware update fix this?
> Found HackRF board 0:
> USB descriptor string: 0000000000000000285067dc2d0f3f4b
> Board ID Number: 2 (HackRF One)
> Firmware Version: 2017.02.1
> Part ID Number: 0xa000cb3c 0x005c4f6a
> Serial Number: 0x00000000 0x00000000 0x285067dc 0x2d0f3f4b
> _______________________________________________
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>
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