By the way, is it possible to boot Sailfish in verbose mode on Jolla device (i.e. not with the splash screen but with detailed output from the kernel, systemd and etc.)? PlasmaActive boots that way and I kind of prefer it. Any kernel parameters help to change that?

For example in GRUB I usually set loglevel=4 as a parameter for bootloader to get a reasonably verbose output. What bootloader does Jolla device use by the way?