So, every time I am turning my PC off I can see only that:
03 15:11:58 solus umount[4629]: umount: /home: target is busy.
03 15:11:58 solus systemd[1]: home.mount: Mount process exited, code=exited, status=32/n/a
03 15:11:58 solus systemd[1]: Failed unmounting /home.
03 15:11:58 solus systemd[1]: tmp.mount: Mount process exited, code=exited, status=32/n/a
03 15:11:58 solus systemd[1]: Failed unmounting Temporary Directory (/tmp).
03 15:11:58 solus systemd[1]: Stopped target Swap.
03 15:11:58 solus systemd[1]: Deactivating swap Swap Partition...
03 15:11:58 solus systemd[1]: systemd-fsck@dev-disk-by\x2duuid-03668361\x2d58ce\x2d4ca9\x2dbee0\x2db6b415532d05.service: Succeeded.
03 15:11:58 solus systemd[1]: Stopped File System Check on /dev/disk/by-uuid/03668361-58ce-4ca9-bee0-b6b415532d05.
As a result I must hold power button
Also, this is the output of findmnt
TARGET SOURCE FSTYPE OPTIONS
/ /dev/sda3 ext4 rw,relatime,errors=remount-ro
├─/sys sysfs sysfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/kernel/security securityfs securityf rw,nosuid,nodev,noexec,relatime
│ ├─/sys/fs/cgroup tmpfs tmpfs ro,nosuid,nodev,noexec,size=4096k,nr_inodes=10
│ │ ├─/sys/fs/cgroup/systemd cgroup cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_
│ │ ├─/sys/fs/cgroup/freezer cgroup cgroup rw,nosuid,nodev,noexec,relatime,freezer
│ │ ├─/sys/fs/cgroup/perf_event cgroup cgroup rw,nosuid,nodev,noexec,relatime,perf_event
│ │ ├─/sys/fs/cgroup/pids cgroup cgroup rw,nosuid,nodev,noexec,relatime,pids
│ │ ├─/sys/fs/cgroup/net_cls,net_prio cgroup cgroup rw,nosuid,nodev,noexec,relatime,net_cls,net_pr
│ │ ├─/sys/fs/cgroup/blkio cgroup cgroup rw,nosuid,nodev,noexec,relatime,blkio
│ │ ├─/sys/fs/cgroup/memory cgroup cgroup rw,nosuid,nodev,noexec,relatime,memory
│ │ ├─/sys/fs/cgroup/cpu,cpuacct cgroup cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct
│ │ ├─/sys/fs/cgroup/devices cgroup cgroup rw,nosuid,nodev,noexec,relatime,devices
│ │ └─/sys/fs/cgroup/cpuset cgroup cgroup rw,nosuid,nodev,noexec,relatime,cpuset
│ ├─/sys/firmware/efi/efivars efivarfs efivarfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/fs/bpf none bpf rw,nosuid,nodev,noexec,relatime,mode=700
│ ├─/sys/kernel/debug debugfs debugfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/kernel/tracing tracefs tracefs rw,nosuid,nodev,noexec,relatime
│ └─/sys/fs/fuse/connections fusectl fusectl rw,nosuid,nodev,noexec,relatime
├─/proc proc proc rw,nosuid,noexec,relatime
│ └─/proc/sys/fs/binfmt_misc systemd-1 autofs rw,relatime,fd=34,pgrp=1,timeout=0,minproto=5,
├─/dev devtmpfs devtmpfs rw,nosuid,noexec,size=3673580k,nr_inodes=91839
│ ├─/dev/shm tmpfs tmpfs rw
│ ├─/dev/pts devpts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxm
│ ├─/dev/mqueue mqueue mqueue rw,nosuid,nodev,noexec,relatime
│ └─/dev/hugepages hugetlbfs hugetlbfs rw,relatime,pagesize=2M
├─/run tmpfs tmpfs rw,nosuid,nodev,size=1476708k,nr_inodes=819200
│ └─/run/user/1000 tmpfs tmpfs rw,nosuid,nodev,relatime,size=738352k,nr_inode
│ ├─/run/user/1000/doc portal fuse.port rw,nosuid,nodev,relatime,user_id=1000,group_id
│ └─/run/user/1000/gvfs gvfsd-fuse fuse.gvfs rw,nosuid,nodev,relatime,user_id=1000,group_id
├─/tmp tmpfs tmpfs rw,nosuid,nodev,nr_inodes=409600
└─/home /dev/sda2 ext4 rw,relatime,errors=remount-ro
