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 AM SASANO Takayoshi <uaa@mx5.nisiq.net> 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) <uaa@mx5.nisiq.net>
--
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