SOLVED: RAM upgrade ignored or kernel panic arises on Thinkpad T22
I just:
1) updated the BIOS, from IBM site
2) re-did the ram installation
Maybe only one of the above was necessary, but in any case it seems
that Linux was not really at fault...maybe the problem was also
affecting XP, and I wasn't careful checking...I don't really use XP
that much...although I did to update the BIOS because the IBM BIOS
automated lookup only works for MS OS's, and the updater is an .exe
program.
lilo.conf did *not* need to be modified.
Anyhow, thanks everyone!--Virgil
--- Virgil <virgilinux@yahoo.com> wrote:
> Running Debian Woody Kernel 2.4.18 on an IBM Thinkpad T-22.
> Upgraded RAM from 128M to 256M.
> Windows XP recognizes new RAM, and apparently has no difficulties
> with
> it.
>
> Linux does NOT seem to recognize the added RAM.
>
> free
> total used free shared buffers
> cached
> Mem: 125876 121812 4064 0 4040
> 51304
> -/+ buffers/cache: 66468 59408
>
> grep '^Memory' /var/log/dmesg
> Memory: 125596k/131072k available (1783k kernel code, 5008k reserved,
> 549k data, 280k init, 0k highmem)
>
> Following instructions given in:
> http://www.webmo.net/support/linux_memory.html
>
> I added
> append="mem=256M"
> to lilo.conf and ran and executed /sbin/lilo -v
>
> A warm re-boot has no effect, but a cold reboot ends in kernel panic
> "unable to handle kernell null pointer dereference at virtual address
> 00000003.
>
> Could it be that I may have accidentally limit my kernel to 128M
> during
> installation?
>
> Deleting (via rescue disk) the added line eliminates the kernel
> panic,
> but of course only 128M of memory are used. Bottom line, I cannot use
> the upgraded memory with Linux.
>
> Much "googling" has not produced a solution.
>
> Thanks for your help.
>
> __Virgil
>
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