Comment # 4 on bug 1056637 from Josef Reidinger

For original bug report. I check logs and it looks like udev device disappear
from system. It is written in bootloader configuration, but looks like no
longer on system. I see that device is also at /var/log/YaST2 ( for details
arvin or HuHa need to check that log file ). So looks like problem of udev that
device disappear.

For workaround I suggest to check re-propose configuration ( YaST2 should ask
for it ) or find it manually ( I expect it will be in
/etc/default/grub_installdevice and replace it with proper device here or at
least for start you can remove it and then use yast2 bootloader to assign it
again ).