Boot problems are situations when your system does not boot properly
(does not boot to the expected runlevel and login screen).
13.3.1 Fails to Load the GRUB Boot Loader
If the hardware is functioning properly, it is possible that the boot
loader has become corrupted and Linux cannot start on the machine. In
this case, it is necessary to reinstall the boot loader. To reinstall
the boot loader, proceed as follows:
Insert the installation media into the drive.
Reboot the machine.
Select from the boot menu.
Select a language.
Accept the license agreement.
In the screen, select
and set the installation mode to
Once in the YaST System Repair module, select then select .
Restore the original settings and reinstall the boot loader.
Leave YaST System Repair and reboot the system.
Other reasons for the machine not booting may be BIOS-related:
- BIOS Settings
Check your BIOS for references to your hard drive. GRUB might simply
not be started if the hard drive itself cannot be found with the
current BIOS settings.
- BIOS Boot Order
Check whether your system's boot order includes the hard disk. If the
hard disk option was not enabled, your system might install properly,
but fail to boot when access to the hard disk is required.
13.3.2 No Graphical Login
If the machine comes up, but does not boot into the graphical login
manager, anticipate problems either with the choice of the default
runlevel or the configuration of the X Window System. To check the
runlevel configuration, log in as the
root user and check
whether the machine is configured to boot into runlevel 5 (graphical
desktop). A quick way to check this is to examine the contents of
/etc/inittab, as follows:
nld-machine:~ # grep "id:" /etc/inittab
The returned line indicates that the machine's default runlevel
(initdefault) is set to 5 and that
it should boot to the graphical desktop. If the runlevel is set to any
other number, use the YaST Runlevel Editor module to set it to
Do not edit the runlevel configuration manually. Otherwise SuSEconfig
(run by YaST) will overwrite these changes on its next run. If you
need to make manual changes here, disable future SuSEconfig changes by
setting CHECK_INITTAB in
/etc/sysconfig/suseconfig to no.
If the runlevel is set to 5, you might have
corruption problems with your desktop or X Windows software. Examine the
log files at /var/log/Xorg.*.log for detailed
messages from the X server as it attempted to start. If the desktop
fails during start, it might log error messages to
/var/log/messages. If these error messages hint at
a configuration problem in the X server, try to fix these issues. If the
graphical system still does not come up, consider reinstalling the
One quick test: the startx command should force the X
Window System to start with the configured defaults if the user is
currently logged in on the console. If that does not work, it should log
errors to the console. For more information about the X Window system
configuration, refer to Section 10.0,
The X Window System, (↑ Reference ).