Cannot boot new kernel

**gary_becker** · 01-09-2008

I am a newbie to linux
I have been using 2.6.18-8.el5 kernel version with my CentOS 5
I want to compile a new kernel - 2.6.24
I have compiled the kernel by
=>downloading the source
=>copying the working .config to /usr/src/kernel/linux-2.6.24
=>make menuconfig, (and save)
=>make
=> make modules
=> make modules_install
=> make install

I can see the kernel image, the intird image and the grub updated

When I try to reboot through the new kernel is
gives message
Cannot find filesystem /dev/root
...
..
and some kernel panic message

Anyone please help me debug the problem

Awaiting a response

Thank you,
Gary

**devils casper** · 01-09-2008

Hi and Welcome !

I can see the kernel image, the intird image and the grub updated

Post the contents of grub.conf file and output of this

Code:

ls /boot

**gary_becker** · 01-10-2008

Pasting the contents of the grub.conf
-----------------------------------------------------------------------------------------------------------------------------------
10 default=3
11 timeout=5
12 splashimage=(hd0,1)/boot/grub/splash.xpm.gz
13 hiddenmenu
14 title CentOS (2.6.23.12)
15 root (hd0,1)
16 kernel /boot/vmlinuv-2.6.23.12 ro root=LABEL=/ rhgb
17 initrd /boot/initrd-2.6.23.12.img
18 title CentOS (2.6.24-rc5)
19 root (hd0,1)
20 kernel /boot/vmlinuz-2.6.24-rc5 ro root=LABEL=/ rhgb quiet
21 initrd /boot/initrd-2.6.24-rc5.img
22 title CentOS (2.6.18-8.1.15.el5xen)
23 root (hd0,1)
24 kernel /boot/xen.gz-2.6.18-8.1.15.el5
25 module /boot/vmlinuz-2.6.18-8.1.15.el5xen ro root=LABEL=/ rhgb quiet
26 module /boot/initrd-2.6.18-8.1.15.el5xen.img
27 title CentOS (2.6.18-8.el5)
28 root (hd0,1)
29 kernel /boot/vmlinuz-2.6.18-8.el5 ro root=LABEL=/ rhgb quiet
30 initrd /boot/initrd-2.6.18-8.el5.img
31 title CentOS (2.6.24-rc5)My installation
32 root (hd0,1)
33 kernel /boot/vmlinuz-2.6.24-rc5 ro root=LABEL=/ rhgb quiet
34 initrd /boot/initrd-2.6.24-rc5.img
35 title Other
36 rootnoverify (hd0,0)
37 chainloader +1
---------------------------------------------------------------------------------------------------------------------------------
The problem occurs with 2.6.23.12, 2.6.24-rc5 and(2.6.24-rc5)My installation

The output of ls -a /boot is
--------------------------------------------------------------------------------------------------------------------------
.
..
config-2.6.18-8.1.15.el5xen
config-2.6.18-8.el5
grub
initrd-2.6.18-8.1.15.el5xen.img
initrd-2.6.18-8.el5.img
initrd-2.6.23.12.img
initrd-2.6.24.img
initrd-2.6.24-rc5.img
initrd.img-2.6.24
initrd.img-2.6.24-rc5
message
mkinitramfs
newkernel
symvers-2.6.18-8.1.15.el5xen.gz
symvers-2.6.18-8.el5.gz
System.map
System.map-2.6.18-8.1.15.el5xen
System.map-2.6.18-8.el5
System.map-2.6.23.12
System.map-2.6.24-rc5
System.map-2.6.24-rc5.old
vmlinuz
vmlinuz-2.6.18-8.1.15.el5xen
vmlinuz-2.6.18-8.el5
vmlinuz-2.6.23.12
vmlinuz-2.6.24
vmlinuz-2.6.24-rc5
vmlinuz-2.6.24-rc5.old
xen.gz-2.6.18-8.1.15.el5
xen-syms-2.6.18-8.1.15.el5
------------------------------------------------------------------------------------------------------------------------
Regards,
Gaurav

**gary_becker** · 01-14-2008

Hi devils_casper
Any suggestion?
Any other information you need?
Note that the current running kernel is different from the one i am compiling.
Please give me pointers in debugging this problem.
Regards,
Gary

**adriangolding** · 11-14-2008

hi! i have exactly the same problem.

did you find a solution for this?
i have the same distro as you

**devils casper** · 11-14-2008

Originally Posted by adriangolding

hi! i have exactly the same problem.

did you find a solution for this?
i have the same distro as you

Hi and Welcome !

Post the contents of grub.conf file and output of fdisk -l command here.

**adriangolding** · 11-14-2008

hello: grub.conf :

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,1)
# kernel /vmlinuz-version ro root=/dev/sda3
# initrd /initrd-version.img
#boot=/dev/sda
default=2
timeout=5
splashimage=(hd0,1)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.24)
root (hd0,1)
kernel /vmlinuz-2.6.24 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.24.img
title CentOS (2.6.24.7)
root (hd0,1)
kernel /vmlinuz-2.6.24.7 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.24.7.img
title CentOS (2.6.18-8.el5)
root (hd0,1)
kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-8.el5.img

---------

fdisk -l :

Disk /dev/sda: 250.0 GB, 250000000000 bytes
255 heads, 63 sectors/track, 30394 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 6 48163+ de Dell Utility
/dev/sda2 * 7 19 104422+ 83 Linux
/dev/sda3 20 10218 81923467+ 83 Linux
/dev/sda4 10219 30394 162063720 5 Extended
/dev/sda5 10219 11238 8193118+ 82 Linux swap / Solaris

--------

it is a very strange problem: it was going into init 5 and i can see the CentOs graphical loading screen and it starts to load all the modules but right after it loads the last module (i think its smartd), all these while its in the graphical mode, it suddenly goes to the login localhost screen (init 3).

i logged in as root and tried to enter 'init 5' but nothing happens. no error messages or any thing happening.

thank you for your quick reply ..

**devils casper** · 11-14-2008

It looks like Display problem only.
What the output of startx command? Post the output of this too :

Code:

su -
/sbin/lspci | grep -i vga
grep -i driver /etc/X11/xorg.conf

**adriangolding** · 11-14-2008

startx:

xauth: creating new authority file /root/.serverauth.3489

Fatal server error:
Server is already active for display 0
If this server is no longer running, remove /tmp/.X0-lock and start again

lspci output:

00:05.0 VGA compatible controller: nVidia Corporation C51 PCI Express Bridge (rev a2)

xorg.conf:

Driver "kbd"
Driver "vesa"

thank you - adrian

**devils casper** · 11-14-2008

Boot up in Single User Mode and execute startx command. Post output here.

Highlight CentOS title In GRUB Menu and press 'e'. Select 'kernel' line and press 'e' again. Add <space> 3 at the end of line and hit 'Enter' key.
Press 'b' and CentOS will boot up in command line mode and drop you at Login Prompt.

e -- Select kernel line -- e -- 3 -- Enter key -- b

Log in as root and execute this

Code:

startx

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Cannot boot new kernel

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