Re: comms/rtl-sdr fix rtl_tcp

--000000000000f7c392065837fb5f
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi,

yeah, this annoying frequency changing, I tested with gqrx as client and
your patch definitely helps.

applied.

thank you,
Sebastian

On Tue, Aug 4, 2026 at 12:30=E2=80=AFAM SASANO Takayoshi <[email protected]=
> wrote:

> Hi,
>
> > without and with your patch, I can run rtl_sdr -a 127.0.0.1 and connect
> > gqrx to it, to listen to radio.
> > So what does the patch fix for you?
> >
> > Do you have something I could reproduce?
>
> 1. run "rtl_tcp -a 0.0.0.0" on OpenBSD machine
> 2. run Airspy's SDRsharp on Windows machine
> 3. connect rtl_tcp server from SDRsharp client and start receive
> 4. change frequency on SDRsharp with up/down button (frequency number)
>
> same problem will occur on CubicSDR with rtl-sdr (this occur
> without rtl_tcp server).
>
>
> It looks librtlsdr's radio controlling api like rtlsdr_set_center_freq()
> is blocked during rtlsdr_read_sync() is activated.
>
> (maybe libusb's control transfer is blocked whle bulk transfer is running=
)
>
> Regards,
> --
> SASANO Takayoshi (JG1UAA) <[email protected]>
>


--=20
https://buzzdeee.reitenba.ch

--000000000000f7c392065837fb5f
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi,</div><div><br></div><div>yeah, this annoying freq=
uency changing, I tested with gqrx as client and your patch definitely help=
s.</div><div><br></div><div>applied.</div><div><br></div><div>thank you,</d=
iv><div>Sebastian</div></div><br><div class=3D"gmail_quote gmail_quote_cont=
ainer"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 4, 2026 at 12:30=
=E2=80=AFAM SASANO Takayoshi &lt;<a href=3D"mailto:[email protected]">uaa@m=
x5.nisiq.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex">Hi,<br>
<br>
&gt; without and with your patch, I can run rtl_sdr -a 127.0.0.1 and connec=
t<br>
&gt; gqrx to it, to listen to radio.<br>
&gt; So what does the patch fix for you?<br>
&gt; <br>
&gt; Do you have something I could reproduce?<br>
<br>
1. run &quot;rtl_tcp -a 0.0.0.0&quot; on OpenBSD machine<br>
2. run Airspy&#39;s SDRsharp on Windows machine<br>
3. connect rtl_tcp server from SDRsharp client and start receive<br>
4. change frequency on SDRsharp with up/down button (frequency number)<br>
<br>
same problem will occur on CubicSDR with rtl-sdr (this occur<br>
without rtl_tcp server).<br>
<br>
<br>
It looks librtlsdr&#39;s radio controlling api like rtlsdr_set_center_freq(=
)<br>
is blocked during rtlsdr_read_sync() is activated.<br>
<br>
(maybe libusb&#39;s control transfer is blocked whle bulk transfer is runni=
ng)<br>
<br>
Regards,<br>
-- <br>
SASANO Takayoshi (JG1UAA) &lt;<a href=3D"mailto:[email protected]" target=
=3D"_blank">[email protected]</a>&gt;<br>
</blockquote></div><div><br clear=3D"all"></div><br><span class=3D"gmail_si=
gnature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature"><d=
iv dir=3D"ltr"><a href=3D"https://buzzdeee.reitenba.ch" target=3D"_blank">h=
ttps://buzzdeee.reitenba.ch</a></div></div>

--000000000000f7c392065837fb5f--