Hello, I've come to the only place I think can offer some answers - would appreciate the help of CvH and friends!
After working fine with libreelec and tvheadend for years, my 3 Xbox tuners have stopped working. They no longer worked in fresh installs on x86 and pi3. I guessed they must have burned out from being in a confined space over a hot summer. There were no updates or software changes made.
Mysteriously, I bought a new Xbox tuner and it was exactly the same. Able to scan EPG but not tune to a channel. Tried again on pi3, x86, tvheadend add-on and in docker, nextpvr, ubuntu, the lot. All the same, recognised, driver loaded, but not able to tune a channel. No helpful debug log clues I have found
So I guessed: another burned tuner? (Because I am crazy) I bought a 5th tuner (they are so cheap). Brand new, sealed, fresh. Same again.
My setup
LibreELEC 9.0.2 - have tried updating to 9.2.4 - same result
NUC7PJYH Pentium J5005 Gemini Lake
Xbox One DVB-T2 tuners x5, as above - I know they are not perfect but worked great for me
Geniatech DVB-S2 reciever - working as normal
Reasonable aerial signal strength that has been unchanged, my TV and Vbox can still tune from it
Logs
LibreELEC:~ # dmesg | grep dvb
[ 5.902813] kernel-overlays-setup: processing conf
/storage/.cache/kernel-overlays/50-driver.dvb.crazycat.conf
[ 5.925044] kernel-overlays-setup: added modules
from /usr/lib/kernel-overlays/driver.dvb.crazycat/lib/modules/4.19.36
[ 7.536764] dvb-usb: found a 'Microsoft Xbox One
Digital TV Tuner' in cold state, will try to load a firmware
[ 7.540381] dvb-usb: downloading firmware from file
'dvb-usb-dib0700-1.20.fw'
[ 8.268002] dvb-usb: found a 'Microsoft Xbox One
Digital TV Tuner' in warm state.
[ 8.268212] dvb-usb: will pass the complete MPEG2
transport stream to the software demuxer.
[ 8.268661] dvbdev: DVB: registering new adapter
(Microsoft Xbox One Digital TV Tuner)
[ 8.269104] dvbdev: dvb_create_media_entity: media
entity 'dvb-demux' registered.
[ 8.458982] dvbdev: dvb_create_media_entity: media
entity 'Panasonic MN88472' registered.
[ 8.459287] dvb-usb: Microsoft Xbox One Digital TV
Tuner successfully initialized and connected.
[ 8.459727] dvb-usb: found a 'Microsoft Xbox One
Digital TV Tuner' in cold state, will try to load a firmware
[ 8.459789] dvb-usb: downloading firmware from file
'dvb-usb-dib0700-1.20.fw'
[ 9.041326] dvb-usb: found a 'Microsoft Xbox One
Digital TV Tuner' in warm state.
[ 9.041513] dvb-usb: will pass the complete MPEG2
transport stream to the software demuxer.
[ 9.041854] dvbdev: DVB: registering new adapter
(Microsoft Xbox One Digital TV Tuner)
[ 9.042097] dvbdev: dvb_create_media_entity: media
entity 'dvb-demux' registered.
[ 9.233901] dvbdev: dvb_create_media_entity: media
entity 'Panasonic MN88472' registered.
[ 9.234262] dvb-usb: Microsoft Xbox One Digital TV
Tuner successfully initialized and connected.
[ 9.234531] dvb-usb: found a 'Microsoft Xbox One
Digital TV Tuner' in cold state, will try to load a firmware
[ 9.234582] dvb-usb: downloading firmware from file
'dvb-usb-dib0700-1.20.fw'
[ 9.844687] dvb-usb: found a 'Microsoft Xbox One
Digital TV Tuner' in warm state.
[ 9.844859] dvb-usb: will pass the complete MPEG2
transport stream to the software demuxer.
[ 9.845294] dvbdev: DVB: registering new adapter
(Microsoft Xbox One Digital TV Tuner)
[ 9.845546] dvbdev: dvb_create_media_entity: media
entity 'dvb-demux' registered.
[ 10.039048] dvbdev: dvb_create_media_entity: media
entity 'Panasonic MN88472' registered.
[ 10.039341] dvb-usb: Microsoft Xbox One Digital TV
Tuner successfully initialized and connected.
[ 10.039428] usbcore: registered new interface
driver dvb_usb_dib0700
[ 14.110952] mn88472 5-0018: downloading firmware
from file 'dvb-demod-mn88472-02.fw'
[ 92.925236] mn88472 6-0018: downloading firmware
from file 'dvb-demod-mn88472-02.fw'
[ 93.107604] mn88472 4-0018: downloading firmware
from file 'dvb-demod-mn88472-02.fw'
LibreELEC:~ # dmesg | grep DVB
[ 8.268661] dvbdev: DVB: registering new adapter
(Microsoft Xbox One Digital TV Tuner)
[ 8.458976] usb 1-3.2: DVB: registering adapter 0
frontend 0 (Panasonic MN88472)...
[ 9.041854] dvbdev: DVB: registering new adapter
(Microsoft Xbox One Digital TV Tuner)
[ 9.233894] usb 1-3.3: DVB: registering adapter 1
frontend 0 (Panasonic MN88472)...
[ 9.845294] dvbdev: DVB: registering new adapter
(Microsoft Xbox One Digital TV Tuner)
[ 10.039041] usb 1-3.4: DVB: registering adapter 2
frontend 0 (Panasonic MN88472)...
[ 93.069932] usb 1-3.4: DVB: adapter 2 frontend 0
frequency 0 out of range (42000000..870000000)
[ 93.104873] usb 1-3.3: DVB: adapter 1 frontend 0
frequency 0 out of range (42000000..870000000)
[ 93.254849] usb 1-3.2: DVB: adapter 0 frontend 0
frequency 0 out of range (42000000..870000000)
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Can anyone help me debug this?