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Bug#479101: linux-image-2.6.25-1-amd64: Kernel panic: Unable to mount root



maximilian attems wrote:
On Sat, May 03, 2008 at 11:54:35AM +0200, Eugen Dedu wrote:
maximilian attems wrote:
On Sat, May 03, 2008 at 10:01:20AM +0200, Eugen Dedu wrote:
maximilian attems wrote:
On Fri, May 02, 2008 at 09:03:28PM +0200, Eugen Dedu wrote:
Subject: linux-image-2.6.25-1-amd64: Kernel panic: Unable to mount root
Package: linux-image-2.6.25-1-amd64
Version: 2.6.25-1
Severity: normal

*** Please type your report below this line ***
Hi,

The new kernel 2.6.25-1 panics on my amd64 MacBookPro machine.
Previous kernels worked.  The output is:
[...]
NET: Registered protocol family 1
NET: Registered protocol family 17
registered taskstats version 1
RAMDISK: coulndn't find valid RAM disk image starting at 0
List of all partitions:
... ram0 (driver?)
...
... ram15 (driver?)
No filesystem could mount root, tried:
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block (8,3)

I tried the ideas of http://wiki.debian.org/InitramfsDebug:
with rootdelay=9, it does wait for 9 seconds, afterwards it panics
with the same message.

With 2.6.24, ls /proc/cmdline prints:
BOOT_IMAGE=LinuxOLD ro root=803
so you don't land in debug console of initramfs?
Sorry, I don't understand.

try to use break=mount or such see man initramfs-tools
When booting 2.6.24, I login as usual and have the /proc/cmdline above.

When booting 2.6.25, with or without rootdelay=9, the kernel panics, no prompt/console.

so it's a kernel or bootloader trouble probably.
post cat /etc/i-t/i-t.conf
and check that your root device driver is in both initramfs.
After the procedure at http://wiki.debian.org/InitramfsDebug (it should be cd /tmp, not cd ~/tmp on the page!!!):

snoopy:/tmp$ grep reiserfs initramfs*
initramfs.content:./lib/modules/2.6.25-1-amd64/kernel/fs/reiserfs
initramfs.content:./lib/modules/2.6.25-1-amd64/kernel/fs/reiserfs/reiserfs.ko
initramfs-old.content:./lib/modules/2.6.24-1-amd64/kernel/fs/reiserfs
initramfs-old.content:./lib/modules/2.6.24-1-amd64/kernel/fs/reiserfs/reiserfs.ko

i wouldn't doubt that reiserfs is in your initramfs,
what i was sepaking about is the sata or scsi driver.
please check from initramfs console if he is loaded and
if expected device is there.

Hi,

I typed Linux break=X at boot prompt, with X=mount, premount, modules and top. In all the cases, it does NOT stop before the panic. I do not have any console.

--
Eugen



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