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Re: [Fwd: Re: VFS: Cannot open root device 2141 ... Kernelpanic: VFS: Unable to mount root fs on unk-blk(33,65)]




Subject:
Re: [Fwd: Re: VFS: Cannot open root device 2141 ... Kernelpanic: VFS: Unable to mount root fs on unk-blk(33,65)]
From:
Marty <martyb@ix.netcom.com>
Date:
Sat, 25 Jun 2005 16:06:29 -0400

To:
debian-user@lists.debian.org


Gayle Lee Fairless wrote:

line 'initrd=/initrd.img' after the read-only line in the Linux label stanza. Now the 2.6 kernel (you guessed or read correctly) boots. It appears to be a little fussier than the bf2.4 kernel which still works fine. I kept it under the LinuxOld label where the package put it in lilo.conf.

After I fixed the lilo.conf with the initrd=/initrd.img, I got the 2.6.8 kernel to run but ran into what appeared to be Bug #276020 filed against that kernel so I went to unstable and got the 2.6.11 kernel. It seems to manifest the same bug with wvdial.





Marty <martyb@ix.netcom.com> asked:

I just read it.  Just to clarify, are you saying that you too have a
500MHz Celeron in a Dell Optiplex GX-100?



Gayle's reply:

I have a Gateway 500 with a Pentium III at 500 MHZ that bootup identifies as Katmai. That speed is approximately close enough to the speed of a Celeron at 500 MHZ, or so it would seem. It is possible that I skimmed over the Bugreport a little too lightly, but the general description seems pertinent.



  I now have package

ii kernel-image-2 2.6.11-7 Linux kernel image for version 2.6.11 on PPr

from unstable on a sarge upgraded from woody. I managed to use pon somehow to connect to the Internet, but it seems to cut on and off periodically.

    Is there a better workaround?



Marty <martyb@ix.netcom.com> asked:

Did you try an internal modem?  How about recompiling the kernel
with a 100Hz tick (instead of the default 1KHz)?  These are the
first troubleshooting steps I would take based on the bug description.



Gayle's reply:

I am using the standard Debian kernel-images at present and have yet to attempt compiling a kernel. Although the Gateway 500 does have an internal modem that Windows 98SE can use, Linux appears to be able to use only the Hayes external modem.

   I got the following comment from Len Chatagnier:

Hello Gayle,

The problem with wvdial on sarge stable is with the wvdialconf and pppconfig. Yes, this is a newbie making that statement. My last reply about wvdial v1.54 was incorrect. I was using pon to keep from using su and when I tried wvdial it didn' work; only pon on woody works. I discovered that there is no ATDT command in the configurations and recall that sarge testing had it. I've run wvdialconf and pppconfig and it wasn't added. Of course, there may have been a change I'm not aware of that made it unnecessary; but highly unlikely. There are 3 wvdial configuration files in sarge and on mine they were all different; the one in /home/usr had the dialer info commented out. I changed all 3 to agree with /etc/wvdial.conf as it was the most complete but no ATDT entry in any. I remember gettting a lot of help from Marv S. at Linuxant.com on sarge testing and vaguely recall him having me add init3=ATDT to wvdial.conf. If you still can't get wvdial to work check for the ATDT entry; I'm sure its required. Got your message before adding it to my conf, but will try it
as soon as I send this.

Leonard


Gayle's current status and possible lines of development:

I intend to look at Leonard's suggestion to see if that works. If it doesn't, then I recall that in a previous thread that there is a 'Debian way' to compile a kernel. I have already downloaded some of the packages necessary to do that such as


gayle@Gcomm:~/docs/wrk/wonk$ dpkg -l | grep kernel
ii iptables 1.2.11-10 Linux kernel 2.4+ iptables administration to ii kcmlinuz 3.3.2-1 KDE Frontend for the Linux kernel configurat ii kernel-doc-2.6 2.6.8-16 Linux kernel specific documentation for vers ii kernel-headers 101 Linux kernel headers 2.6 on PPro/Celeron/PII ii kernel-headers 2.6.8-16 Header files related to Linux kernel version ii kernel-headers 2.6.8-16 Linux kernel headers 2.6.8 on PPro/Celeron/P ii kernel-image-2 2.4.16-1 Linux kernel image for version 2.4.16 on PPr ii kernel-image-2 2.6.11-7 Linux kernel image for version 2.6.11 on PPr ii kernel-image-2 2.6.8-16 Linux kernel image for version 2.6.8 on PPro
ii  kernel-kbuild- 2.6.8-2        Linux kernel 2.6 kbuild tools
ii kernel-package 8.135 A utility for building Linux kernel related ii kernel-source- 2.6.8-16 Linux kernel source for version 2.6.8 with D ii ksymoops 2.4.9-1 Linux kernel oops and error message decoder
ii  linux-kernel-h 2.5.999-test7- Linux Kernel Headers for development
ii  module-init-to 3.2-pre1-2     tools for managing Linux kernel modules
ii  nfs-kernel-ser 1.0.6-3.1      Kernel NFS server support
ii r-cran-kernsmo 2.22.15-1 GNU R package for kernel smoothing and densi
gayle@Gcomm:~/docs/wrk/wonk$

Obviously, I would probably want the source code for the 2.6.11 kernel rather than the 2.6.8 code. And also the 2.4 stuff would not be relevant. I would want to consider the tick timing solution, compiling snd-ens1371, ext2 and/or ext3, vfat, ide stuff, usb stuff, and whatever else that should be in a custom kernel.

Possibly off-topic, but does a custom kernel use the initrd line in lilo.conf? (Feel free to introduce a new topic in answer or discussion!)


--
(Mr.) Gayle Lee Fairless, http://counter.li.org/
Linux Gcomm 2.4.18-bf2.4 #1 Son Apr 14 09:53:28 CEST 2002 i686 unknown
Linux Gcomm 2.6.11-1-686 #1 Mon Jun 20 22:00:38 MDT 2005 i686 GNU/Linux



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