Re: [Xenomai-help] xenomai version 2.4.4 with linux kernel 2.6.25.11 under ubuntu problem

[Theo Veenker <Theo.Veenker@domain.hid>]

Dehann Fourie wrote:
> 
> HI,
> 
> Im not the expert but I had the same problem under xubuntu 7.10. I tried 
> mkinitrd, but this command doesn't come standard with Ubuntu. I resorted 
> to Debian and installed under an unencrypted fs. I think that the fs 
> encryption could be ur problem.
> 
> Dehann
> 
> On Mon, Aug 4, 2008 at 4:49 PM, <stefano.franzoni@domain.hid
> <mailto:stefano.franzoni@domain.hid>> wrote:
> 
> 
>     Dear
> 
>     I am trying to install Xenomai under Ubuntu following this guide:
>     http://www.xenomai.org/index.php/Xenomai_quick_build_quide
> 
>     I have successfully patched the kernel with xenomai and compiled it.
> 
>     I have created a new entry in grub/menu.lst
> 
>     title kernel 2.6.25.11 <http://2.6.25.11> with xenomai 2.4.4 and
>     Ubuntu 8.04
>     root (hd0,2)
>     kernel /boot/vmlinuz-2.6.25.11-xenomai-2.4.4 root=/dev/hdb3 ro
>     zeno_nucleus.xenomai_gid=1004
> 
>     I have one hard disk with two partitions and I am working on hdb3.
> 
>     At the reboot of the PC I see the message:
> 
>     cannot open root device "hdb3" or unknown-block(0,0)
>     please append a correct root= boot option; here are the available
>     partitions:
>     0100 65536 ram0 (driver?)
>     0101 65536 ram1 (driver?)
>     …
>     010f 65536 ram15 (driver?)
> 
>     kernel panic - not syncing: VFS unable to mount root fs on
>     unknown-block(0,0)
> 
>     - I have included in the kernel, not as module the File System EXT3.
>     - I have also included in the kernel, not as module, the
>     ATA/ATAPI/MFM/RLL Support -> Enhanced IDE/MFM

You should also compile in the chipset stuff needed for the drive you boot
from if you don't want the hassle of creating an initrd. I had to compile
in BLK_DEV_PIIX for mine and also added some generic ones as non-modules.

Theo