As discussed in dm900/920 section it seems that there is a problem showing picon of dvb-t channels using default skin dreamOs.
The problem is related to namespace of dvb-t channels which is different from default EEEE0000.
Example: Rai 4 (see screenshot).
There is no picon in infobar while the picon is on fs:
root@dm920:/data/picon# ls -la 1_0_1_2187_4_13E_EEEE0000_0_0_0.png
-rw-r--r-- 1 root root 4375 Dec 11 22:00 1_0_1_2187_4_13E_EEEE0000_0_0_0.png
If I rename the file replacing EEEE0000 with EEEE0204 the picon in infobar is showed.
root@dm920:/data/picon# ls -la /usr/share/enigma2/picon*
lrwxrwxrwx 1 root root 11 Dec 11 17:38 /usr/share/enigma2/picon -> /data/picon
lrwxrwxrwx 1 root root 11 Dec 11 21:50 /usr/share/enigma2/picon_100x60 -> /data/picon
lrwxrwxrwx 1 root root 11 Dec 11 18:43 /usr/share/enigma2/picon_130x80 -> /data/picon
lrwxrwxrwx 1 root root 11 Dec 11 18:44 /usr/share/enigma2/picon_220x132 -> /data/picon
lrwxrwxrwx 1 root root 11 Dec 11 18:44 /usr/share/enigma2/picon_50x30 -> /data/picon
lrwxrwxrwx 1 root root 11 Dec 11 18:44 /usr/share/enigma2/picon_oled -> /data/picon
I attach enigma2.log created with
journalctl -f -u enigma2 > /data/enigma2.log
before changing channel.