Comment # 12 on bug 1046961 from Peter K�ppers

next I tried debugging from man:/dracut
section 'Debugging dracut on shutdown'

so I attached the /run/initramfs/rdsosreport.txt from shutdown

my /proc/cmdline:
BOOT_IMAGE=/vmlinuz-4.4.74-18.20-default root=/dev/mapper/linux-root ro
resume=/dev/linux/swap splash=verbose quiet showopts console=tty1

my /etc/fstab:
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /       btrfs   defaults 0 0 
/dev/linux/home /home   xfs     defaults 1 2 
/dev/linux/swap swap    swap    defaults 0 0 
UUID=cf351894-daab-47cb-9b09-8191574d96af       /boot   btrfs   defaults 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /opt    btrfs   subvol=@/opt 0
0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /srv    btrfs   subvol=@/srv 0
0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /tmp    btrfs   subvol=@/tmp 0
0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /usr/local      btrfs  
subvol=@/usr/local 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/cache      btrfs  
subvol=@/var/cache 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/crash      btrfs  
subvol=@/var/crash 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/libvirt/images btrfs  
subvol=@/var/lib/libvirt/images 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/machines       btrfs  
subvol=@/var/lib/machines 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/mailman        btrfs  
subvol=@/var/lib/mailman 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/mariadb        btrfs  
subvol=@/var/lib/mariadb 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/mysql  btrfs  
subvol=@/var/lib/mysql 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/named  btrfs  
subvol=@/var/lib/named 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/lib/pgsql  btrfs  
subvol=@/var/lib/pgsql 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/log        btrfs  
subvol=@/var/log 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/opt        btrfs  
subvol=@/var/opt 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/spool      btrfs  
subvol=@/var/spool 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /var/tmp        btrfs  
subvol=@/var/tmp 0 0 
UUID=ffb9f608-58db-4f77-9dd8-598055e1efeb       /.snapshots     btrfs  
subvol=@/.snapshots 0 0 
UUID=14CA-3CE3  /boot/efi       vfat    umask=0002,utf8=true 0 2

my etc/dracut.conf
# PUT YOUR CONFIG IN separate files
# in /etc/dracut.conf.d named "<name>.conf"
# SEE man dracut.conf(5) for options

files from ls /etc/dracut.conf.d (see attachments):
02-early-microcode.conf
99-debug.conf

hope these information are sufficient
if not, tell me please