I noticed this issue myself today where after boot from deep standby, the USB tuner attached to the T2 was identified as type DVB-S2. The tuner wasn't usable.
Two new options appeared in the "Tuner setup" screen (MENU->Tuners->Tuner allocation) -
Preferred tuner DVB-T
Preferred tuner DVB-T for recordings
I restarted the UI and Device Information now reports the USB tuner correctly as type DVB-T, and those two new options weren't shown in the "Tuner setup" screen.
Does this point to a firmware issue and not a driver issue, since the issue has been observed with different dongles/drivers, and that after a UI restart it was correctly reported?
At boot time, the tuner appers to be identified as terrestrial in /var/log/messages -
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Nov 12 11:35:25 beyonwizt2 user.info kernel: usb 1-1: DVB: registering adapter 1 frontend 0 (Realtek RTL2832 (DVB-T))...
After boot from deep standby -
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Nov 12 11:35:29 beyonwizt2 user.info kernel: dvb dvb.0: DVB: registering adapter 0 frontend 0 ()...
Nov 12 11:35:29 beyonwizt2 user.notice kernel: vtunerc0: VTUNER_SET_NAME 'RTL2838UHIDIR'
Nov 12 11:35:29 beyonwizt2 user.notice kernel: vtunerc0: VTUNER_SET_TYPE 'DVB-T' => 'RTL2838UHIDIR'
Nov 12 11:35:29 beyonwizt2 user.err kernel: vtunerc0: unknown IOCTL 0x6
Nov 12 11:35:29 beyonwizt2 user.err kernel: vtunerc0: unknown IOCTL 0x20
Nov 12 11:35:29 beyonwizt2 user.err kernel: vtunerc0: unknown IOCTL 0x21
After UI restart -
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Nov 12 12:03:09 beyonwizt2 user.info kernel: dvb dvb.0: DVB: registering adapter 0 frontend 0 ()...
Nov 12 12:03:09 beyonwizt2 user.notice kernel: vtunerc0: VTUNER_SET_NAME 'RTL2838UHIDIR'
Nov 12 12:03:09 beyonwizt2 user.notice kernel: vtunerc0: VTUNER_SET_TYPE 'DVB-T' => 'RTL2838UHIDIR'
Nov 12 12:03:10 beyonwizt2 user.err kernel: vtunerc0: unknown IOCTL 0x6
Nov 12 12:03:10 beyonwizt2 user.err kernel: vtunerc0: unknown IOCTL 0x20
Nov 12 12:03:10 beyonwizt2 user.err kernel: vtunerc0: unknown IOCTL 0x21
Cheers
Geoff