Problem with RF Gain at gr-osmosdr in GNU Radio 3.8

[Marcelo Doallo]

Hi,
Recentely I have updated to kubuntu 20.04 LST, so I migrated from GNU
Radio 3.7 to 3.8.
I have a Hack RF One SDR and I realized that RF Gain at osmocom source
block do not react in GNU Radio 3.8.

The information about my SDR is here:
# hackrf_info 
hackrf_info version: unknown
libhackrf version: unknown (0.5)
Found HackRF
Index: 0
Serial number: 0000000000000000909864c8384a6acf
Board ID Number: 2 (HackRF One)
Firmware Version: 2015.07.2 (API:1.00)
Part ID Number: 0xa000cb3c 0x00694f4e

Any comment or help is welcome.

Best regards.
Marcelo Doallo (LW1EFZ)
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