[PROBLEM] Xbian doesn't boot

[havilson]

Ok, I mounted the SD under Linux Mint. Can see both partitions, VFAT and BTRFS.
This is my cmdline.txt:
"telnet zswap.enabled=1 zswap.compressor=lz4 console=tty1 partswap root=/dev/mmcblk0p2 rootflags=subvol=root/@,autodefrag,compress=lzo rootfstype=btrfs rootwait logo.nologo quiet noswap loglevel=0 startevent=mountall selinux=0 splash nohdparm net.ifnames=0 biosdevname=0 --startup-event mountall"

Shall I replace everything with "rescue" or put it somewhere inside? Sorry if this can be very newbie but I am.

Updating:

Just put the rescue command inside, adding to it. It worked and I was able to boot into rescue mode.
I could also run rch.
Then I tried to watch what happens so I did nothing and rebooted.
Now It keeps on a black screen with a login prompt and a small yellow flashing bolt on the upper right corner.
Tomorrow I'll try to rollback a snapshot.