I tried downgrading but the commands - as stated above - do not produce the required result, i.e. downgrading does not take place as the lower version manually entered is not found.
As for the power cycling, yes… I removed the TV power plug for at least half an hour and tried again…
For what it’s worth, if you’re using cec-client (libcec), since the Samsung update, I had to send raw bytes without waiting for a response.
This is my turn-on.sh script:
#!/bin/sh
echo on 0 | cec-client -s -d 1
echo as | cec-client -s -d 1
# Send raw bytes to turn on tv
echo tx 10:04 | cec-client -s -d 1
# Send raw bytes to make current source active
echo tx 10:82 | cec-client -s -d 1
This is my turn-off.sh script:
#!/bin/sh
echo is | cec-client -s -d 1
echo standby 0 | cec-client -s -d 1
# Send raw bytes to make source inactive
echo tx 10:9d | cec-client -s -d 1
# Send raw bytes to turn off TV
echo tx 10:36 | cec-client -s -d 1