Posts by ghtester

I am using the DVB-T2 adapter MyGica T230C on RPi 4B and with the same setup as in earlier official LibreELEC build 9.2.5 which worked (with checked Force old status checkbox in TV adapter config), I am not able to get the Signal quality / SNR displayed in Kodi anymore.

Service backend is Tvheadend Server 4.2 ( HTS Tvheadend 4.2.8-36 ~ LibreELEC Tvh-addon v9.80.6.123 ), PVR client is Tvheadend HTSP Client 7.2.1.1 (both installed from the Nightly Add-ons list).

Tested on some latest Nightly builds with the same results:

LibreELEC-RPi4.arm-9.80-nightly-20201024-636e32e.tar

LibreELEC-RPi4.arm-9.80-nightly-20201030-7f3b20d.tar

LibreELEC-RPi4.arm-9.80-nightly-20201031-cf5a710.tar

In TVheadend GUI on Status page the Signal quality / SNR is visible:

SNR: 29.5 dB

Signal Strength: -46.0 dBm

When tried femon, I have found that SNR is still reported with the same - fix - value which does not reflect the Tvheadend's value and the Signal value is random after every femon start:

LibreELEC:~ # femon -H

FE: Silicon Labs Si2168 (DVBT)

Problem retrieving frontend information: Unknown error 524

status SCVYL | signal 7% | snr 71% | ber 0 | unc 0 | FE_HAS_LOCK

^C

LibreELEC:~ # femon -H

FE: Silicon Labs Si2168 (DVBT)

Problem retrieving frontend information: Unknown error 524

status SCVYL | signal 70% | snr 71% | ber 0 | unc 0 | FE_HAS_LOCK

^C

LibreELEC:~ # femon -H

FE: Silicon Labs Si2168 (DVBT)

Problem retrieving frontend information: Unknown error 524

status SCVYL | signal 38% | snr 71% | ber 0 | unc 0 | FE_HAS_LOCK

^C

LibreELEC:~ # femon -H

FE: Silicon Labs Si2168 (DVBT)

Problem retrieving frontend information: Unknown error 524

status SCVYL | signal 26% | snr 71% | ber 0 | unc 0 | FE_HAS_LOCK

^C

LibreELEC:~ # femon -H

FE: Silicon Labs Si2168 (DVBT)

Problem retrieving frontend information: Unknown error 524

status SCVYL | signal 57% | snr 71% | ber 0 | unc 0 | FE_HAS_LOCK

Is there any chance it could be fixed in future please? For me that feature was quite useful as I need to struggle with room antenna position often due to bad signal.

FYI I have also tested Astrometa DVB-T2 (with Sony CXD2837ER demod.) with the same result, it also have more other issues due to bad driver but In TVheadend GUI on Status page the Signal quality / SNR is also visible (with reversed Signal Strength sign):

SNR: 25.7 dB

Signal Strength: 90.6 dBm

In this case femon does not return random signal value but always 0.

Thanks for the hint, Hias, I can confirm cec-ctl works and can be used at the same time with Kodi, in my case at least for TV status monitoring and power on (all other commands, unfortunately including standby and power-off, are ignored by my 10 years old TV).

Some examples, if someone else is interested:

Show topology:

LibreELEC:~ # cec-ctl -S

Driver Info:

Driver Name : vc4_hdmi

Adapter Name : vc4

Capabilities : 0x0000010e

Logical Addresses

Transmit

Passthrough

Connector Info

Driver version : 5.9.0

Available Logical Addresses: 1

DRM Connector Info : card 0, connector 32

Physical Address : 1.0.0.0

Logical Address Mask : 0x0002

CEC Version : 1.4

Vendor ID : 0x001582 (Pulse-Eight)

OSD Name : ''

Logical Addresses : 1 (Allow Fallback to Unregistered)

Logical Address : 1 (Recording Device 1)

Primary Device Type : Record

Logical Address Type : Record

System Information for device 0 (TV) from device 1 (Recording Device 1):

CEC Version : Tx, OK, Rx, Timeout

Physical Address : Tx, OK, Rx, Timeout

Vendor ID : 0x00e091 (LG)

OSD Name : Tx, OK, Rx, Timeout

Menu Language : kor

Power Status : On

Topology:

1.0.0.0: Recording Device 1

Power on:

LibreELEC:~ # cec-ctl --user-control-pressed ui-cmd=power-on-function --to 0

Driver Info:

Driver Name : vc4_hdmi

Adapter Name : vc4

Capabilities : 0x0000010e

Logical Addresses

Transmit

Passthrough

Connector Info

Driver version : 5.9.0

Available Logical Addresses: 1

DRM Connector Info : card 0, connector 32

Physical Address : 1.0.0.0

Logical Address Mask : 0x0002

CEC Version : 1.4

Vendor ID : 0x001582 (Pulse-Eight)

OSD Name : ''

Logical Addresses : 1 (Allow Fallback to Unregistered)

Logical Address : 1 (Recording Device 1)

Primary Device Type : Record

Logical Address Type : Record

Transmit from Recording Device 1 to TV (1 to 0):

USER_CONTROL_PRESSED (0x44):

ui-cmd: power-on-function (0x6d)

Sequence: 178 Tx Timestamp: 654.417s

Monitor CEC traffic:

LibreELEC:~ # cec-ctl -m

Driver Info:

Driver Name : vc4_hdmi

Adapter Name : vc4

Capabilities : 0x0000010e

Logical Addresses

Transmit

Passthrough

Connector Info

Driver version : 5.9.0

Available Logical Addresses: 1

DRM Connector Info : card 0, connector 32

Physical Address : 1.0.0.0

Logical Address Mask : 0x0002

CEC Version : 1.4

Vendor ID : 0x001582 (Pulse-Eight)

OSD Name : ''

Logical Addresses : 1 (Allow Fallback to Unregistered)

Logical Address : 1 (Recording Device 1)

Primary Device Type : Record

Logical Address Type : Record

Initial Event: State Change: PA: 1.0.0.0, LA mask: 0x0002, Conn Info: yes

Received from TV to all (0 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Transmitted by Recording Device 1 to all (1 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Received from TV to all (0 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Transmitted by Recording Device 1 to all (1 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Received from TV to all (0 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Transmitted by Recording Device 1 to all (1 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Received from TV to all (0 to 15): STANDBY (0x36)

Received from TV to all (0 to 15): STANDBY (0x36)

Received from TV to all (0 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Transmitted by Recording Device 1 to all (1 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Received from TV to Recording Device 1 (0 to 1): GIVE_DEVICE_VENDOR_ID (0x8c)

Transmitted by Recording Device 1 to all (1 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Received from TV to Recording Device 1 (0 to 1): VENDOR_COMMAND (0x89):

vendor-specific-data: 0x01

Transmitted by Recording Device 1 to TV (1 to 0): VENDOR_COMMAND (0x89):

vendor-specific-data: 0x02 0x05

Received from TV to Recording Device 1 (0 to 1): GIVE_DEVICE_POWER_STATUS (0x8f)

Transmitted by Recording Device 1 to TV (1 to 0): REPORT_POWER_STATUS (0x90):

pwr-state: to-on (0x02)

Received from TV to Recording Device 1 (0 to 1): GIVE_PHYSICAL_ADDR (0x83)

Transmitted by Recording Device 1 to all (1 to 15): REPORT_PHYSICAL_ADDR (0x84):

phys-addr: 1.0.0.0

prim-devtype: record (0x01)

Received from TV to all (0 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Transmitted by Recording Device 1 to all (1 to 15): DEVICE_VENDOR_ID (0x87):

vendor-id: 57489 (0x0000e091)

Thanks a lot for explanation, you are absolutely right.

So that means if I wish to keep the Kodi running, I am now a bit limited regarding to CEC commands which can be sent to TV.

It looks there are only 3 CEC built-in commands in Kodi: CECActivateSource, CECStandby and CECToggleState ( List of built-in functions - Official Kodi Wiki )

I have tested all, kodi-send -a "CECActivateSource" worked fine, remaining commands did not work but I suppose it's due my old TV which is not fully compatible with all CEC commands.

Thanks again for your quick reply.

It looks the cec-client in lates nightly 9.8's is compiled without RPi feature so it does not work anymore on RPi 4B.

Please find the details below.

Hardware: RPI 4B / 1 GB

LG TV

LE version:

LibreELEC (community): nightly-20201024-636e32e (RPi4.arm)

(LibreELEC-RPi4.arm-9.80-nightly-20201024-636e32e.tar)

Upgraded from official 9.2.5 where the HDMI CEC was partially working, some comamnds did not work (maybe the TV issue), some working commands sometimes failed with Segmentation fault error

On 9.2.5:

LibreELEC (official): 9.2.5 (RPi4.arm)

LibreELEC:~ # echo 'scan' | cec-client -s -d 1

opening a connection to the CEC adapter...

requesting CEC bus information ...

CEC bus information

===================

device #0: TV

address: 0.0.0.0

active source: no

vendor: LG

osd string: TV

CEC version: 1.3a

power status: on

language: eng

device #1: Recorder 1

address: 1.0.0.0

active source: no

vendor: LG

osd string: CECTester

CEC version: 1.3a

power status: on

language: eng

on 9.80:

LibreELEC (community): nightly-20201024-636e32e (RPi4.arm)

RPi feature is missing...

LibreELEC:~/downloads # cec-client -l

libCEC version: 4.0.7, compiled on 2020-10-24 09:04:10 by jenkins@tsuboi on Linux 4.19.0-8-amd64 (x86_64), features: P8_USB, DRM, P8_detect, Linux

Found devices: 1

device: 1

com port: Linux

vendor id: 0000

product id: 0000

firmware version: 0

type: Linux

LibreELEC:~/downloads # echo 'scan' | cec-client -s -d 1

opening a connection to the CEC adapter...

ERROR: [ 60] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 60] could not open a connection (try 1)

ERROR: [ 1060] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 1060] could not open a connection (try 2)

ERROR: [ 2060] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 2060] could not open a connection (try 3)

ERROR: [ 3060] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 3060] could not open a connection (try 4)

ERROR: [ 4061] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 4061] could not open a connection (try 5)

ERROR: [ 5061] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 5061] could not open a connection (try 6)

ERROR: [ 6061] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 6062] could not open a connection (try 7)

ERROR: [ 7062] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 7062] could not open a connection (try

ERROR: [ 8062] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 8062] could not open a connection (try 9)

ERROR: [ 9063] CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16

ERROR: [ 9063] could not open a connection (try 10)

unable to open the device on port Linux

ERROR: [ 10063] could not start CEC communications

On RaspberryPI OS 5.4.51-v7l+:

cec-client works

pi@raspberrypi:~/Downloads $ cec-client -l

libCEC version: 4.0.4, compiled on Linux-4.15.0-48-generic ... , features: P8_USB, DRM, P8_detect, randr, RPi, Exynos, AOCEC

Found devices: 1

device: 1

com port: RPI

vendor id: 2708

product id: 1001

firmware version: 1

type: Raspberry Pi