Re: Can't boot kernel-2.6.18-1.2200.fc5

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On Mon, 2006-10-23 at 15:50 +0800, Mel wrote:
> Goksin Akdeniz wrote:
> >> In VAR the boot.log file is empty (0 bytes).
> >> DMesg has no info about the failure
> >> Messages also has no info about the failure.
> >>
> >>
> >> What happens is that I get the boot menu and select the kernel I want.
> >> This part is ok.
> >>
> >> Then I get some text that is to fast for me to read.
> >>
> >> What I can read says something about a panic - APCI- - an unsafe unwind
> >> and mentions something called DWARF2.
> >>
> > Ok then here is a suggestion:
> > 
> > Boot your system. Select the 2.6.18-xxx kernel and press e to edit boot 
> > options. Move to the end of the line with right & left arrow keys. Type 
> > acpi=off et tne end of the line. Press enter and then b
> > 
> > So your new kernel will boot with ACPI disabled. If it is really a power issu 
> > this will reveal it.
> > 
> > And how to get the boot.log file?
> > 
> > It is easy. When you log in to tthe system run terminal/konsole. type su or su 
> > root and become root.
> > 
> > when it is done type gedit. Now you van browse and edit files. Ypu can read 
> > the content od boot.msg and boot.log in /var/log.
> > 
> > I hope it works.
> > 
> > Goksin Akdeniz
> > --------
> > www.enixma.org
> > 
> 
> 
> I understand what you are telling me - almost.
> 
> I am using grub.
> 
> I get more than one line. Which one gets the acpi=off?
> 
If you use -a instead of -e you only get the kernel line to change.
That one is where you put the acpi-off.


> Would editing grub.conf and adding acpi=off at the end of the kernel 
> line do the same thing?
> 
Yes, but it makes it 'permanent' and would require another edit to
remove it later.

> I will try then one by one while I am waiting to hear from you.
> 
> I can get to /var/log. There is no boot.msg file. There are several 
> versions of boot.log -- all of them are 0 bytes in length -- they are empty.
> 
that is normal on my system

> I have looked at the DMesg, messages (more than one version, and the 
> boot files. I see no data about the failures.
> 
To me it sounds as if the crash is occurring before the system gets the
logging turned on, so anything stored in memory is lost instead of being
written to /var/log/messages or dmesg.

> Is there a way to turn on recording into the boot,log file?

logging to boot.log is done by syslogd.  If that is not already active
when a message needs logged it may get lost.  Look at /etc/syslog.conf
to see what gets logged where.  You may fine tune as needed, but as
always, keep a working copy to restore if something goes wrong.
> 

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