Adaptive range error when adjusting rtlsdr gain about dump1090 HOT 4 CLOSED

-9 is LIBUSB_ERROR_PIPE, i.e. we sent a control transfer and the 2832 is responding with a USB stall.

I believe this means that I2C communication with the tuner is failing i.e. this is a hardware problem.

I don't see this error on dongles here.

(I have seen one other report of a similar problem on the FA forums, but not enough info there to follow up, and the majority of installs seem fine)

from dump1090.

Maybe one thing you can try is to get a wireshark capture of the USB traffic (https://gitlab.com/wireshark/wireshark/-/wikis/CaptureSetup/USB) to/from the dongle at the point where it's failing; maybe there's something informative beyond just "USB stall" in there.

from dump1090.

I believe the cause of the problem was either the hardware that I was using.. or the fact that I was running Ubuntu under VMWare ESXi 6.7 with the USB devices set as pass-thru so that they are presented to the VM. I ended up installing the same dongles on different hardware.. using the same install scripts (for the OS and dump1090-fa). If I had more time, I would troubleshoot further.. but alas, its not a dump1090-fa problem.. so we can close this issue now.

If anyone else wants to do further testing with USB passthru devices under VMWare ESXi, be my guest (pun intended).

from dump1090.

Oh, it's a VM, okay. USB passthrough in VMs does have a history of working poorly with rtlsdr dongles (in particular it drops data like crazy, so mlat is unlikely to work) so I'm not too surprised that control transfers while data is flowing also has problems.

from dump1090.