[doveman2]

@doveman2, I don't know anything specifically about your usb tuners, but I have seen many cases where a company like hauppauge will change the chipset in a product and not change the product id. I wonder if that is the case with the 2 usb tuners you have. Have you tried swapping them on the same pi? What does lsusb show as the device id for each device? If they are different that may indeed indicate a hardware difference despite being the same model.

The one he's got now was working fine on my RPi B before I sent it to him, as is the one I'm using now, so even if they do have different chipsets they're both compatible.

Both our dmesg show "usb 1-1.3.1: dvb_usb_af9035: prechip_version=83 chip_version=01 chip_type=9135" but then mine shows

usb 1-1.3: dvb_usb_v2: found a 'Kworld UB499-2T T09' in cold state
dvb_usb_v2: downloading firmware from file 'dvb-usb-it9135-01.fw

whilst his shows

usb 1-1.3.1: dvb_usb_v2: found a 'ITE 9135 Generic' in warm state

and nothing about downloading firmware

Mine shows

[ 11.071673] DVB: registering new adapter (Kworld UB499-2T T09)
[ 11.212479] af9033 0-0038: firmware version: LINK 12.54.14.0 - OFDM 2.47.14.0
[ 11.212505] af9033 0-0038: Afatech AF9033 successfully attached
[ 11.212553] usb 1-1.3: DVB: registering adapter 0 frontend 0 (Afatech AF9033 (DVB-T))...
[ 11.319758] it913x 0-001c: ITE IT913X AX successfully attached
[ 11.319810] usb 1-1.3: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[ 11.320062] DVB: registering new adapter (Kworld UB499-2T T09)
[ 11.396617] af9033 0-003a: firmware version: LINK 12.54.14.0 - OFDM 2.47.14.0
[ 11.396644] af9033 0-003a: Afatech AF9033 successfully attached
[ 11.396694] usb 1-1.3: DVB: registering adapter 1 frontend 0 (Afatech AF9033 (DVB-T))...
[ 11.456508] it913x 0-001d: ITE IT913X AX successfully attached

whilst his shows

[ 9.827705] DVB: registering new adapter (ITE 9135 Generic)
[ 9.936723] af9033 0-0038: firmware version: LINK 12.54.14.0 - OFDM 2.47.14.0
[ 9.936748] af9033 0-0038: Afatech AF9033 successfully attached
[ 9.936796] usb 1-1.3.1: DVB: registering adapter 0 frontend 0 (Afatech AF9033 (DVB-T))...
[ 10.054312] it913x 0-001c: ITE IT913X AX successfully attached

so it looks like his RPi is only registering one of the dual tuners and is recognising it by a different user-friendly name. Most importantly though, it just doesn't work when I try accessing port 9981 from his browser.

I can't easily check his just now but my lsusb shows.

Bus 001 Device 005: ID 1b80:e409 Afatech IT9137FN Dual DVB-T [KWorld UB499-2T]
Bus 001 Device 004: ID 046e:5577 Behavior Tech. Computer Corp.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. SMC9512/9514 USB Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub