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Old 11-14-2003, 08:23 AM   #1
Citizen Bleys
Registered: Mar 2001
Location: Moncton, NB
Distribution: Gentoo 2006.0
Posts: 181

Rep: Reputation: 30
Full Metal Kernel Panic

I'm trying to update a RH8.0 box to Kernel 2.6.0-test9.

I used as my guide--It's been a long time since I've updated a kernel (it was back when RH7.3 was the hottest thing on the market, and I was updating 7.2 to use the kernel from 7.3)

I wasn't able to find a kernel RPM for 2.6.x, so I downloaded the .tar.gz from and compiled it myself, using make oldconfig to copy settings from the default RH8.0 kernel.

Now, I tried to be as redundant as possible; I copied bzImage to /boot/bzImage-2.6.0test-9 and then copied that to /boot/vmlinuz-2.6.0-test9 even though the guide didn't say to do that (the old kernel was named vmlinuz), and then I copied the executable vmlinux to the boot directory as well.

I ran mkinitrd from the /boot directory and added an entry in GRUB for the new kernel, and re-pointed to, and then rebooted.

Kernel panic. No init found.

That can't be right, I made an initrd.

Fortunately, I left the entry for the old kernel in GRUB, so I was able to boot back in using the 2.4.18 kernel to post this. I've found, however, that is once again pointing to the old 2.4.18 file.

I frigged around with it for about an hour. I even tried pointing the 2.6 kernel entry in grub.conf to the initrd file fro 2.4.18. No dice, no matter what I try, I get a Kernel Panic.

I can't even remember what Kernel Panic is. I thought it had something to do with bad installation media or something; I've had it before during install, and I just restarted the install and everything worked fine.

EDIT: here's grub.conf as it is right now
# grub.conf generated by anaconda
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You do not have a /boot partition. This means that
# all kernel and initrd paths are relative to /, eg.
# root (hd0,4)
# kernel /boot/vmlinuz-version ro root=/dev/hda5
# initrd /boot/initrd-version.img
title Red Hat Linux (2.4.18-14)
root (hd0,4)
kernel /boot/vmlinuz-2.4.18-14 ro root=LABEL=/
initrd /boot/initrd-2.4.18-14.img
title Red Hat Linux (2.6.0-test9)
root (hd0,4)
kernel /boot/vmlinuz-2.6.0-test9 ro root=LABEL=/
initrd /boot/kernel-2.6.0-test9.img

EDIT2: If it's relevant, there are other partitions on the system; it's a shared workstation with BootMagic in the MBR, with two entries pointing to Windows installs for other people, and one entry pointing to /dev/hda5, which is where GRUB and my Linux install resides, in an extended partition.

EDIT3: And here, in case it's helpful, is a directory listing of /boot

total 19904
-rw-r--r-- 1 root root 5824 Sep 5 2002 boot.b
-rw-r--r-- 1 root root 1216301 Nov 13 11:43 bzImage-2.6.0-test9
-rw-r--r-- 1 root root 612 Sep 5 2002 chain.b
-rw-r--r-- 1 root root 42150 Sep 4 2002 config-2.4.18-14
-rw-r--r-- 1 root root 42589 Sep 4 2002 config-2.4.18-14debug
-rw-r--r-- 1 root root 38564 Sep 4 2002 config-2.4.18-14uml
-rw-r--r-- 1 root root 37619 Nov 14 08:28 config-2.6.0-test9
drwxr-xr-x 2 root root 4096 Nov 12 2001 grub/
-rw-r--r-- 1 root root 130326 Nov 12 2001 initrd-2.4.18-14debug.img
-rw-r--r-- 1 root root 130822 Nov 12 2001 initrd-2.4.18-14.img
-rw-r--r-- 1 root root 66162 Nov 14 08:33 initrd-2.6.0-test9custom.img
-rw-r--r-- 1 root root 67472 Nov 14 08:31 initrd-2.6.0-test9.img
-rw-r--r-- 1 root root 67882 Nov 14 09:07 kernel-2.6.0-test9.img
-rw-r--r-- 1 root root 473 Nov 12 2001 kernel.h
-rw-r--r-- 1 root root 23108 Sep 6 2002 message
-rw-r--r-- 1 root root 21282 Sep 6 2002 message.ja
lrwxrwxrwx 1 root root 21 Nov 12 2001 module-info -> module-info-2.4.18-14
-rw-r--r-- 1 root root 15436 Sep 4 2002 module-info-2.4.18-14
-rw-r--r-- 1 root root 15436 Sep 4 2002 module-info-2.4.18-14debug
-rw-r--r-- 1 root root 15436 Sep 4 2002 module-info-2.4.18-14uml
-rw-r--r-- 1 root root 640 Sep 5 2002 os2_d.b
lrwxrwxrwx 1 root root 22 Nov 14 09:07 ->
-rw-r--r-- 1 root root 507814 Sep 4 2002
-rw-r--r-- 1 root root 518875 Sep 4 2002
-rw-r--r-- 1 root root 341833 Sep 4 2002
-rw-r--r-- 1 root root 802956 Nov 13 11:43
-rwxr-xr-x 1 root root 3236438 Sep 4 2002 vmlinux-2.4.18-14*
-rwxr-xr-x 1 root root 3317752 Sep 4 2002 vmlinux-2.4.18-14debug*
-rwxr-xr-x 1 root root 3599926 Nov 14 08:48 vmlinux-2.6.0-test9*
lrwxrwxrwx 1 root root 17 Nov 12 2001 vmlinuz -> vmlinuz-2.4.18-14
-rw-r--r-- 1 root root 1125194 Sep 4 2002 vmlinuz-2.4.18-14
-rw-r--r-- 1 root root 1149556 Sep 4 2002 vmlinuz-2.4.18-14debug
-rwxr-xr-x 1 root root 2496392 Sep 4 2002 vmlinuz-2.4.18-14uml*
-rw-r--r-- 1 root root 1216301 Nov 14 08:41 vmlinuz-2.6.0-test9

EDIT4: Yes, it says ->, but I deleted and recreated the link; I haven't rebooted since.

Last edited by Citizen Bleys; 11-14-2003 at 08:29 AM.
Old 11-14-2003, 09:03 AM   #2
Registered: Aug 2003
Location: Manchester, England, UK, The World....
Distribution: Gentoo/SuSE 9.0
Posts: 291

Rep: Reputation: 30
the 2.4.18 and 2.6.0-test9 kernels are very different, you should reconfigure it.
also i am assuming that you compile and installed the modules (make modules && make modules_install), but you may want to check in /lib/modules to see if the linux-2.6.0-test9 directory actually has the modules in it.
i think init is different from an initrd. (init=the first process from which everything else spawns PID 1

P.S. i am currently halfway through compiling the 2.4.22 modules, when i've done that i'm going to compile the 2.6.0-test9 kernel


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