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 Forum index » Advanced Topics » Hardware
Upgraded memory on IBM Thinkpad 600x, now get kernel panic.
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edoc


Joined: 07 Aug 2005
Posts: 4341
Location: Southeast Georgia, USA

PostPosted: Tue 14 Feb 2006, 13:34    Post subject:  Upgraded memory on IBM Thinkpad 600x, now get kernel panic.  

1.0.4 and 1.0.7 have both been working fine on this IBM Thinkpad 600x.

I upgraded the memory and now 1.0.4 boots from the HDD fine but 1.0.7 from the CD triggers a Kernel Panic.

It seems to happen when mounting /usr_cram.fs file on /usr ...

"Unable to handle kernel paging request at virtual address 2d747465"

followed by a bunch of stuff then ...

"Code: 8b 02 85 c0 74 06 8b 02 a8 02 74 06 81 c1 00 08 00 00 8b 52
<0>Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - no syncing"

Help, please? doc

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miq
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PostPosted: Thu 23 Feb 2006, 11:59    Post subject:  

I had the same problem with several Linux distributions on my TP600E and TP770. Seems like some kernels do not reconginze the correct amount of usable RAM on these Thinkpads. The last few megabytes (~2MB) are not usable by the os, cause the Thinkpad uses them in some way.(power management or BIOS stuff?)

My TP770 had 128MB RAM and i got kernel panics.
I fixed this by passig "mem=124M" to the kernel at boot prompt.
Maybe this works for you.
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edoc


Joined: 07 Aug 2005
Posts: 4341
Location: Southeast Georgia, USA

PostPosted: Fri 24 Feb 2006, 01:39    Post subject:  

miq wrote:
I had the same problem with several Linux distributions on my TP600E and TP770. Seems like some kernels do not reconginze the correct amount of usable RAM on these Thinkpads. The last few megabytes (~2MB) are not usable by the os, cause the Thinkpad uses them in some way.(power management or BIOS stuff?)

My TP770 had 128MB RAM and i got kernel panics.
I fixed this by passig "mem=124M" to the kernel at boot prompt.
Maybe this works for you.


You are presuming I am smarter than I am! Wink

Would I pass such a command within Grub or how, please?

I am running 1.0.7 on the 600x.

Thanks! doc

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miq
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PostPosted: Sun 26 Feb 2006, 14:07    Post subject:  

I'm new to puppylinux so I had to figure this out first:
when booting from CD, you get a boot: prompt.
If you have 128MB try this:

boot: vmlinuz root=/dev/ram0 initrd=image.gz PFILE=pup001-none-26144 mem=120M

In case you have 96MB try mem=88M, with 64MB try mem=56M .

I've tried this with puppy 1.07 live cd, and it worked fine.
If you can boot up (without kernel panic), you can try to increase the mem -value in 1MB steps.
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tempestuous

Joined: 10 Jun 2005
Posts: 5218
Location: Australia

PostPosted: Mon 27 Feb 2006, 22:14    Post subject:  

There's an easier way to add boot options to the liveCD than miq has suggested; at the boot prompt enter the number (1-5) of your boot-choice, then type a space, then each additional boot option separated by a space. Example -
boot: 1 mem=124M

If using grub, open /boot/grub/menu.lst in a text editor and add your boot option(s) to the "kernel" line.
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