RTL-SDR v4 not working

[barf]

Hello the RTL-SDR v3 was working OK but after upgrading the librtlsdr to support v4 the module is failing to detect it with the --probe command.

The v4 is tested and working using rtl_test, rtl_tcp and SDR++ it seems only SoapyRTLSDR has trouble with it on my system now, after rebuilding against the newer librtlsdr from osmocom. Using Debian trixie's rtl-sdr package or the RTL-SDR blog fork gives me the same result.

After running the --probe command the device becomes unusable and needs to be removed and plugged back in again:

$ SoapySDRUtil --probe=driver=rtlsdr
######################################################
##     Soapy SDR -- the SDR abstraction library     ##
######################################################

Probe device driver=rtlsdr
Found Rafael Micro R828D tuner
RTL-SDR Blog V4 Detected
[INFO] Opening Generic RTL2832U OEM :: 00000001...
rtlsdr_read_reg failed with -7
rtlsdr_write_reg failed with -7
rtlsdr_read_reg failed with -7
rtlsdr_write_reg failed with -7
rtlsdr_read_reg failed with -7
rtlsdr_write_reg failed with -7
No supported tuner found
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
Enabled direct sampling mode, input 1
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7
rtlsdr_demod_write_reg failed with -7
rtlsdr_demod_read_reg failed with -7

----------------------------------------------------
-- Device identification
----------------------------------------------------
  driver=RTLSDR
  hardware=UNKNOWN
  index=0
  origin=https://github.com/pothosware/SoapyRTLSDR

----------------------------------------------------
-- Peripheral summary
----------------------------------------------------
  Channels: 1 Rx, 0 Tx
  Timestamps: YES
  Time sources: sw_ticks
  Other Settings:
     * Direct Sampling - RTL-SDR Direct Sampling Mode
       [key=direct_samp, default=0, type=string, options=(0, 1, 2)]
     * Offset Tune - RTL-SDR Offset Tuning Mode
       [key=offset_tune, default=false, type=bool]
     * I/Q Swap - RTL-SDR I/Q Swap Mode
       [key=iq_swap, default=false, type=bool]
     * Digital AGC - RTL-SDR digital AGC Mode
       [key=digital_agc, default=false, type=bool]
     * Test Mode - RTL-SDR Test Mode
       [key=testmode, default=false, type=bool]
     * Bias Tee - RTL-SDR Blog V.3 Bias-Tee Mode
       [key=biastee, default=false, type=bool]

----------------------------------------------------
-- RX Channel 0
----------------------------------------------------
  Full-duplex: NO
  Supports AGC: YES
  Stream formats: CS8, CS16, CF32
  Native format: CS8 [full-scale=128]
  Stream args:
     * Buffer Size - Number of bytes per buffer, multiples of 512 only.
       [key=bufflen, units=bytes, default=262144, type=int]
     * Ring buffers - Number of buffers in the ring.
       [key=buffers, units=buffers, default=15, type=int]
     * Async buffers - Number of async usb buffers (advanced).
       [key=asyncBuffs, units=buffers, default=0, type=int]
  Antennas: RX
  Full gain range: [0, 0] dB
    TUNER gain range: [0, 0] dB
  Full freq range: [23.999, 1764] MHz
    RF freq range: [24, 1764] MHz
    CORR freq range: [-0.001, 0.001] MHz
  Sample rates: [0.225001, 0.3], [0.900001, 3.2] MSps
  Filter bandwidths: [0, 8] MHz

rtlsdr_write_reg failed with -7