@Jarrett Miller: thanks for this hint!
I added "reboot=a,w" to the kernel command line in /etc/defaults/grub and now rebooting works on my Lenovo IdeaPad S205.
However, halt and suspend still don't work.
@Jarrett Miller: thanks for this hint!
I added "reboot=a,w" to the kernel command line in /etc/defaults/grub and now rebooting works on my Lenovo IdeaPad S205.
However, halt and suspend still don't work.