Big thanx to @nhmarujo .... your hint to use "DVB drivers from the latest kernel (media_build)" made my day. Seems the chipset Sony CXD2837ER is not supported in standard Kernel 4.19 driver modules of LibreELEC 9.2.1.
All sources are somewhat mentioning that even people made it somehow working on Kernel 4.x after patching it (
Auzeuner DVB-T2 (Astrometa 2018) driver update by kapitanf · Pull Request #567 · torvalds/linux · GitHub - patch probably coming from
https://www.ebastlirna.cz/modules.php?na…er=asc&start=15 ) - indicate that it is not stable/supported - only in Kernel 5.x.
LibreELEC 10 is still in DEV and should have Kernel 5.x (I believe 5.4 - source LibreELEC - Wikipedia ) - and for that we have to still wait ...
Steps to enable DVB-T2 and DVB-C for Auzeuner DVB-T2 (Astrometa 2018) with chipset Sony CXD2837ER:
- platform LibreELEC 9.2.1 + Tvheadend 4.2 all on RPi 3 (image LibreELEC-RPi2.arm-9.2.1.img.gz)
- I couldn't test the DVB-C - do not have cable - but I executed the TVHeadend DVB-C scan successfully (of course not finding any service)
- my DVB-T2 scan in TVHeadend 4.2 with it's default Mutex definition for Czech Republic was successful and I finally found some DVB-T2 services (before that - scanning via RTL8233P chipset - I was finding only DVB-T services)
Steps to make it happen:
-
Enable DVB drivers from the latest kernel (media_build) in LibreELEC Module Drivers Add-On and Reboot:
-
After Reboot you should see that /dev/dvb/adapterX/frontend1 exists (before that only frontend0 was there)
- LibreELEC:~ # dmesg | grep -n DVB-T
- 303:[ 9.226198] usb 1-1.2: dvb_usb_v2: found a 'Astrometa DVB-T2' in warm state
- 308:[ 9.407100] dvbdev: DVB: registering new adapter (Astrometa DVB-T2)
- 316:[ 9.463662] usb 1-1.2: DVB: registering adapter 0 frontend 0 (Realtek RTL2832 (DVB-T))...
- 317:[ 9.463701] dvbdev: dvb_create_media_entity: media entity 'Realtek RTL2832 (DVB-T)' registered.
- 318:[ 9.464161] usb 1-1.2: DVB: registering adapter 0 frontend 1 (Sony CXD2837ER DVB-T/T2/C demodulator)...
- 319:[ 9.464186] dvbdev: dvb_create_media_entity: media entity 'Sony CXD2837ER DVB-T/T2/C demodulator' registered.
- 328:[ 9.575091] rc rc0: Astrometa DVB-T2 as /devices/platform/soc/http://3f980000.usb/usb1/1-1/1-1.2/rc/rc0
- 329:[ 9.575310] input: Astrometa DVB-T2 as /devices/platform/soc/http://3f980000.usb/usb1/1-1/1-1.2/rc/rc0/input3
- 332:[ 9.602958] usb 1-1.2: dvb_usb_v2: 'Astrometa DVB-T2' successfully initialized and connected
-
After that we can tune the DVB-T2 services successfully (TV Adapter in TVhedend's Configuration->DVB Inputs need to be disabled for t2scan to be able to lock the device):
- LibreELEC:~ # t2scan -Y CZ -a /dev/dvb/adapter0/frontend1 -t 2
- FREQ (42.00MHz ... 1002.00MHz)
- Scanning 8MHz frequencies...
- 474000 (CH21): (time: 00:00.220)
- ...
- (time: 05:48.036) dumping lists (71 services) – Cool
-
Next important step - Disable in TVHeadend the RTL Chipset and keep enabled only Sony CX Chipset (both DVB-C and DVB-T are okay) - after reboot you will see 3 devices under the /dev/dvb/adapter0, after enabling any of those devices - all 3 devices are listed "green" in TVHeadend and can be used to scan DVB-T/T2/C - BUT after reboot (if you keep RTL Chipset enabled) - the TVHeadend start is way longer than usually and then it lists only the RTL device and none of the Sony CX devices.
- Stability of the player - enable "Force old status" on both Sony CXD2837ER devices (DVB-C and DVB-T)
- (I have no proof this flag really helps but I remember this flag being mentioned on other forums + I had few crashes while playing DVB-T2 service if this flag was not enabled)
- One last thing - to have Video stream working in DVB-T2 - Czech Republic (the audio was working fine) - I had to disable OMXPLayer HW Acceleration. Interestingly with the DVB-T on RTL chip - this HW acceleration enabled was actually working fine:
