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June 2010

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Subject:
From:
Przemysław Pawełczyk <[log in to unmask]>
Reply To:
Przemysław Pawełczyk <[log in to unmask]>
Date:
Sun, 27 Jun 2010 13:28:22 +0200
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text/plain (112 lines)
Re: No Mini LiveCD x64. Why?
----------------------------

Hi

Mr Urs Beyerle suggested me to open new thread, so it is. He wrote:

>> Nevertheless, I've just built a mini_livecd 64bit. Download
>> mini_livecd64_SL55_2010-06-24.iso from
>>  http://www.livecd.ethz.ch/download/testing/55/x86_64/
>>  It's not tested, but you may want to give it a try.

I answered with this (my _new_ comments in brackets):

> I did. Some apps didn't open after pressing their buttons when run
> from CD - that's the fault of my DVD drive probably - so I went to
> shell and installed SL x64 via livecd-install.

(a few other distros behaved similarly)

> Alas, I was not able to up the SL x64.

I was not precise - it happened __after__SL was installed on HDD and  
during start-up process.

> The process stopped
> (repeatedly) at the following messages (copied manually from the
> screen, no trace in logs):
>  Switching to new root and running in it
> unmounting old /dev
> unmounting old /proc
> unmounting old /sys
>  request_module: runaway loop modprobe binfmt-464c
> request_module: runaway loop modprobe binfmt-464c
> request_module: runaway loop modprobe binfmt-464c
> request_module: runaway loop modprobe binfmt-464c
> request_module: runaway loop modprobe binfmt-464c
>  (here system went to sleep and it has stopped sending messages...)
>  BTW.1. I looked to the SL partition from other systems and there are
> no dev, proc, sys contents.

(does it mean that the directories were not populated during installation?)

Present Google "research" results:

1.
Q: http://lists.debian.org/debian-amd64/2006/06/msg00165.html
A: That usually signals a mismatch between the word size of the kernel and
the userspace modprobe (one is 32bit and one is 64bit).

2.
Q: http://linux.derkeiler.com/Mailing-Lists/Fedora/2008-01/msg04465.html
A: Too long to cite (two disks with the same partition labels)

3. (INTERESTING)
Q:  
http://saalwaechter-notes.blogspot.com/2008/10/requestmodule-runaway-loop-modprobe.html
A: Short answer: If you are getting this error right after linux kernel  
initialization, you are likely booting a 32-bit kernel with a 64-bit OS.

Long answer: If you boot a 32-bit kernel with a 64-bit OS, when the kernel  
tries to start /sbin/init (a 64-bit binary), it won't recognize the binary  
format, and it'll try to load the binfmt-464c kernel module, which is ELF  
support. (ELF support is generally compiled into the kernel, not built as  
a module, by the way.)

The reason for the loop error is that the kernel is trying to invoke  
modprobe to load the module, and modprobe is itself an ELF binary,  
resulting in a recursion loop...

4. (the same suggestion)
Q: http://www.handhelds.org/hypermail/familiar/45/4572.html
A: Also, there is no binfmt-464c module, this message means you're trying  
to
run a binary that's been compiled for wrong system architecture, ie. i386
instead of the ARM processor that's in iPAQ.

My HDD is partitioned into several chunks:

Disk /dev/sda: 250.0 GB, 250059350016 bytes

WinXP  Sys   Pri   /dev/sda1   *  7  HPFS/NTFS
              Ext   /dev/sda2      f  W95 Ext'd (LBA)
WinXP  Data  Ext   /dev/sda5      7  HPFS/NTFS

Debian Sys   Ext   /dev/sda6     83  Linux
Swap         Ext   /dev/sda7     82  Linux swap / Solaris
Debian Data  Ext   /dev/sda8     83  Linux
SL x64 Test  Ext   /dev/sda9     83  Linux
SL x32 Test  Ext   /dev/sda10    83  Linux

SL x64 was put into /dev/sda9

Has anyone else tried the Mini LiveCD SL x64?

The MoBo is relatively new (comes from the last year):
ASRock M3A785GM-LE/128M (AMD785G+SB710 Chipset)
AMD Athlon II X2 (2 cores)
SATA 250 GB HDD

Some answers suggest SL x64 fault, some my fault with two SLs.

I'll try to run SL x64 as _the only_ SL distro but first this letter.  
Perhaps it will spare me additional work.

Regards

-- 
Przemysław Pawełczyk
http://pp.blast.pl
Używam Opera Mail: http://www.opera.com/mail/

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