Séb: unfortunately this does not work with an RO image:
root@ubuntu-phablet:/# gsettings set com.ubuntu.touch.sound incoming-call-sound home/phablet/Music/bla.mp3
(process:2141): dconf-CRITICAL **: unable to create directory '/root/.cache/dconf': Read-only file system. dconf will not work properly.
(process:2141): dconf-CRITICAL **: unable to create directory '/root/.cache/dconf': Read-only file system. dconf will not work properly.
(process:2141): dconf-CRITICAL **: unable to create directory '/root/.cache/dconf': Read-only file system. dconf will not work properly.
(process:2141): dconf-WARNING **: failed to commit changes to dconf: Error spawning command line 'dbus-launch --autolaunch=b80c9e37e4d22c5146a60050386d6c97 --binary-syntax --close-stderr': Child process exited with code 1
root@ubuntu-phablet:/#
Séb: unfortunately this does not work with an RO image:
root@ubuntu- phablet: /# gsettings set com.ubuntu. touch.sound incoming-call-sound home/phablet/ Music/bla. mp3
(process:2141): dconf-CRITICAL **: unable to create directory '/root/ .cache/ dconf': Read-only file system. dconf will not work properly.
(process:2141): dconf-CRITICAL **: unable to create directory '/root/ .cache/ dconf': Read-only file system. dconf will not work properly.
(process:2141): dconf-CRITICAL **: unable to create directory '/root/ .cache/ dconf': Read-only file system. dconf will not work properly.
(process:2141): dconf-WARNING **: failed to commit changes to dconf: Error spawning command line 'dbus-launch --autolaunch= b80c9e37e4d22c5 146a60050386d6c 97 --binary-syntax --close-stderr': Child process exited with code 1 phablet: /#
root@ubuntu-