Coding Support

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Hudspeth, Robert Lee hudspero at
Fri Aug 16 16:17:45 UTC 2019

Hello, Steve. I tried the fix you suggested the other day, but I still end
up with the same error as before.

I thought it'd help if I show what exactly I'm seeing in my console output
when I try to run both dump978 & dump1090 at the same time.

*Robert L. Hudspeth*

On Thu, Aug 15, 2019 at 1:15 PM Steve Markgraf <steve at> wrote:

> Hi Robert,
> On 15.08.19 17:50, Hudspeth, Robert Lee wrote:
> > I'm trying to run utilities that capture 978
> > <> & 1090Mhz
> > <> traffic simultaneously, but I
> > can't seem to stop rtl_sdr from allocating too many zero-copy buffers
> > and preventing both programs from running simultaneously (I'd like to
> > cut down from 15). I've been through librtlsdr.c and rtl_adsb.c with the
> > hope of manually changing some variable that will let me accomplish this
> > to no avail.
> Just increase the usbfs memory limit, the default is only 16MB.
> Either write the new size, or completely disable the limit with:
> echo 0 > /sys/module/usbcore/parameters/usbfs_memory_mb
> Regards,
> Steve
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