Tvheadend

Version: r43.d4ce022-1

OS: Arch Linux
Hardware: Raspberry Pi 4 with TV hat (Sony CXD2880)
TV service: Freeview, UK

During the set-up wizard the scan never completes and seems to get stuck at 92%.

In the web browser debugger I can see that the progress Ajax call is repeatedly returning:

{"progress":0.9166666666666666,"muxes":12,"services":135}

The tvheadend syslog shows:

ep 25 16:08:50 rpi4 kernel: cxd2880: cxd2880_set_frontend: sys:3 freq:658000000 bw:8
Sep 25 16:08:50 rpi4 tvheadend²⁴⁵⁶: subscription: 000D: "scan" subscribing to mux "658MHz", weight: 5, adap>
Sep 25 16:08:51 rpi4 kernel: cxd2880: cxd2880_set_frontend: tune result 0
Sep 25 16:08:55 rpi4 tvheadend²⁴⁵⁶: mpegts: 658MHz in DVB-T Network - scan no data, failed
Sep 25 16:08:55 rpi4 tvheadend²⁴⁵⁶: subscription: 000D: "scan" unsubscribing
Sep 25 16:08:55 rpi4 kernel: cxd2880: cxd2880_set_frontend: sys:3 freq:650000000 bw:8
Sep 25 16:08:55 rpi4 tvheadend²⁴⁵⁶: mpegts: 650MHz in DVB-T Network - tuning on Sony CXD2880 #0 : DVB-T #0
Sep 25 16:08:55 rpi4 tvheadend²⁴⁵⁶: epggrab: 650MHz in DVB-T Network - registering mux for OTA EPG
Sep 25 16:08:55 rpi4 tvheadend²⁴⁵⁶: subscription: 000F: "scan" subscribing to mux "650MHz", weight: 5, adap>
Sep 25 16:08:56 rpi4 kernel: cxd2880: cxd2880_set_frontend: tune result 0
Sep 25 16:09:04 rpi4 tvheadend²⁴⁵⁶: mpegts: 650MHz in DVB-T Network scan complete
Sep 25 16:09:04 rpi4 tvheadend²⁴⁵⁶: subscription: 000F: "scan" unsubscribing
Sep 25 16:09:04 rpi4 tvheadend²⁴⁵⁶: mpegts: 578MHz in DVB-T Network - tuning on Sony CXD2880 #0 : DVB-T #0
Sep 25 16:09:04 rpi4 tvheadend²⁴⁵⁶: epggrab: 578MHz in DVB-T Network - registering mux for OTA EPG
Sep 25 16:09:04 rpi4 tvheadend²⁴⁵⁶: subscription: 0011: "scan" subscribing to mux "578MHz", weight: 5, adap>
Sep 25 16:09:04 rpi4 kernel: cxd2880: cxd2880_set_frontend: sys:3 freq:578000000 bw:8
Sep 25 16:09:05 rpi4 kernel: cxd2880: cxd2880_set_frontend: tune result 0
Sep 25 16:09:09 rpi4 tvheadend²⁴⁵⁶: mpegts: 578MHz in DVB-T Network scan complete
Sep 25 16:09:09 rpi4 tvheadend²⁴⁵⁶: subscription: 0011: "scan" unsubscribing
Sep 25 16:09:09 rpi4 tvheadend²⁴⁵⁶: mpegts: 682MHz in DVB-T Network - tuning on Sony CXD2880 #0 : DVB-T #0
Sep 25 16:09:09 rpi4 tvheadend²⁴⁵⁶: epggrab: 682MHz in DVB-T Network - registering mux for OTA EPG
Sep 25 16:09:09 rpi4 tvheadend²⁴⁵⁶: subscription: 0013: "scan" subscribing to mux "682MHz", weight: 5, adap>
Sep 25 16:09:09 rpi4 kernel: cxd2880: cxd2880_set_frontend: sys:3 freq:682000000 bw:8
Sep 25 16:09:10 rpi4 kernel: cxd2880: cxd2880_set_frontend: tune result 0
Sep 25 16:09:14 rpi4 tvheadend²⁴⁵⁶: mpegts: 682MHz in DVB-T Network - scan no data, failed
Sep 25 16:09:14 rpi4 tvheadend²⁴⁵⁶: subscription: 0013: "scan" unsubscribing
Sep 25 16:09:14 rpi4 kernel: cxd2880: cxd2880_set_frontend: sys:3 freq:626000000 bw:8
Sep 25 16:09:14 rpi4 tvheadend²⁴⁵⁶: mpegts: 626MHz in DVB-T Network - tuning on Sony CXD2880 #0 : DVB-T #0
Sep 25 16:09:14 rpi4 tvheadend²⁴⁵⁶: epggrab: 626MHz in DVB-T Network - registering mux for OTA EPG
Sep 25 16:09:14 rpi4 tvheadend²⁴⁵⁶: subscription: 0015: "scan" subscribing to mux "626MHz", weight: 5, adap>
Sep 25 16:09:15 rpi4 kernel: cxd2880: cxd2880_set_frontend: tune result 0
Sep 25 16:09:21 rpi4 tvheadend²⁴⁵⁶: mpegts: 626MHz in DVB-T Network scan complete
Sep 25 16:09:21 rpi4 tvheadend²⁴⁵⁶: subscription: 0015: "scan" unsubscribing

There is no further output.

If I click "Save & Next" the wizard does complete and I have some channels

However, if I try version 4.2.8 the scan completes and I have all the channels I was expecting.