the usual kernel panic troubles - SOLVED

**d38dm8nw81k1ng** · 08-25-2005

on my first attempt to install gentoo and compile a kernel from scratch, i think i messed it up. it compiles and install okay, but when i come to booting the OS from the hard drive i suffer a kernel panic:

Code:

usb 4-1&#58; new low speed USB device using uhci_hcd and address 2
UDF-fs&#58; No partition found&#40;1&#41;
Kernel panic - Not syncing&#58;VFS&#58; Unable to mount root fs on unkown-block&#40;3,3&#41;

i installed it on a reiserfs partition and have already configured ReiserFS support into the Kernel. the GRUB Boot is also pointing to the correct Kernel (kernel-2.6.12-gentoo-r6). i am running an IDE hard drive and have installed the support for that as well. although, i am looking at the config file now and am wondering if Parallel IDE high-level drivers will be of any importance.

the only part of the manual i didn't follow is the networking section (since i ain't setting up a network and only have access to the internet from a USB modem

) i also didn't change the symlink to kernel-2.6.11-gentoo-r3 but i can't see this making much difference.

EDIT: I (sortof) solved this problem when i got my new ethernet modem and was able to start from stage 1

**dylunio** · 08-26-2005

can you post your grub.conf file as well as say which partitions (/dev/hd**) the /boot and / partitions are on.

**d38dm8nw81k1ng** · 08-26-2005

well, the SuSE GRUB (which i'm using) calls it menu.lst but here it is:

Code:

title =Gentoo Linux 2005.1
root &#40;hd0,0&#41;
kernel /kernel-2.6.12-gentoo-r6 root=/dev/hda3

the GRUB is on my /dev/hda6 (SUSE) iirc. there is a GRUB installed on /dev/hda1 but that wasn't booting SUSE so i reverted to the SuSE one.
the /boot and / for gentoo are on /dev/hda3

**dylunio** · 08-26-2005

hmm, try this as the gentoo stanza for the menu.lst:

title GENTOO
kernel (hd0,2)/kernel-2.6.12-gentoo-r6 root=/dev/hda3

**d38dm8nw81k1ng** · 08-26-2005

ok, that didn't work. it gave me a file not found error, which means the problem isn't GRUB, but it is the gentoo kernel.

**dylunio** · 08-26-2005

Can you post the whole of your gentoo fstab file then please.

**d38dm8nw81k1ng** · 08-26-2005

ok, i entered it as it was in the manual but when i did a SuSE repair (for other reasons) it decided that it was wrong, and this is the outcome:

Code:

shm           /dev/shm      tmpfs       nodev,nosuid,noexec 0 0
/dev/hda3  /                   reiserfs       noatime                 1 1
/dev/hdc    /mnt/cdrom   subfs          noauto, &#40;blah&#41;         0 0
devpts       /dev/pts        devpts        mode=620,gid=5     0 0
usbfs         /proc/bus/usb usbfs           noauto                  0 0
/dev/hda1  /boot             ext2            noauto,user           0 0

worth noting that i don't boot from hda1, i boot from hda6 (SuSE).

**dylunio** · 08-26-2005

Hmm, the only thing I can suggest is to try to get it to boot with:

shm /dev/shm tmpfs nodev,nosuid,noexec 0 0
/dev/hda3 / reiserfs noatime 1 1
/dev/hdc /mnt/cdrom subfs noauto, (blah) 0 0
devpts /dev/pts devpts mode=620,gid=5 0 0
#usbfs /proc/bus/usb usbfs noauto 0 0
/dev/hda1 /boot ext2 noauto,user 0 0

**drakebasher** · 08-26-2005

Try this: Get the Grub command prompt by pressing 'c' when you get the boot menu. At the Grub prompt, do 'root (hd0,0)' and then do 'kernel / <tab>'. Grub should return a list of files found in (hd0,0) and you should see in that list your kernel 'kernel-2.6.12-gentoo-r6'. If it isn't listed, we need to look elsewhere.

**drakebasher** · 08-26-2005

dylunio, could the reiserfs be causing a problem? How does Grub know to use the stage1.5-reiserfs and not another one?

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