I've got same issue with latest build:
Code2017-02-06 13:13:46.692 mpegts: 658MHz in dvbt - tuning on Realtek RTL2832 (DVB-T) : DVB-T #0 2017-02-06 13:13:46.693 linuxdvb: Realtek RTL2832 (DVB-T) : DVB-T #0 - DTV_CLEAR failed [e=Inappropriate ioctl for device] 2017-02-06 13:13:46.693 mpegts: 522MHz in dvbt - tuning on Realtek RTL2832 (DVB-T) : DVB-T #0 2017-02-06 13:13:46.693 linuxdvb: Realtek RTL2832 (DVB-T) : DVB-T #0 - DTV_CLEAR failed [e=Inappropriate ioctl for device] 2017-02-06 13:13:46.693 mpegts: 754MHz in dvbt - tuning on Realtek RTL2832 (DVB-T) : DVB-T #0 2017-02-06 13:13:46.693 linuxdvb: Realtek RTL2832 (DVB-T) : DVB-T #0 - DTV_CLEAR failed [e=Inappropriate ioctl for device]
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To fix this problem, use my build from :[7.95.beta5] LibreELEC 8.0 builds for KI Plus / KII Pro
If is same as kszaq's only adding support for internal dvb tuner. Also install tvheadend42 + pvr.hts from this post.
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I also have an USB DVB-T/C adapter with Si2168, and manually installing (just) afl1's Tvheadend addon (replacing the one from kszaq's addons repo + disabling auto-update) fixes the issue for me.