Comment 4 for bug 100005

The computer has many linux partition. It has one main Linux (ubuntu 6.06) partition which is the ONLY ONE having grub installed. Feisty was installed in a separate parition. During feisty installation, grub installation was skipped BUT the dialog box indicated to boot feisty from /dev/sdb7. I added the following grub entry which worked fine (note it's 2.6.20-12);
Grub Parameters for that kernel;
title Ubuntu 7.04 Hdb7, kernel 2.6.20-12
    root (hd1,6)
    kernel /boot/vmlinuz-2.6.20-12-generic root=/dev/sdb7 ro vga=0x31A
    initrd /boot/initrd.img-2.6.20-12-generic
    boot

I always used /dev/hdb7 in previous linux installed I found strange to use /dev/sdb7 but someone indicated that feisty was using /dev/sdbNN because of the new libpata... Feisty was running fine with the grub entry above. Trying to use root=/dev/hdb7 with feisty kernel 2.6.20-12 was not working.

Then during one feisty update, kernel 2.6.20-13 was installed. Feisty kernel upgrade couldn't update the grub entry above since it's in another linux partition. I had to manually update the grub entry above entry by changing 2.6.20-12 by 2.6.20-13 and leaving root=/dev/sdb7.

When booting this new 2.6.20-13, the kernel hang at "Uniform CD-ROM drive Revision: 3.20" and I raised the problem in launchpad.

After some more experientation with Linux Kernel SysRequest debuggin feature. I have been able to see the message like "couldn't find /dev/sdb7". I then tried to update the grub entry to pass root=/dev/hdb7. Since then the kernel 2.6.20-13 is working as expected.

I do not know if the other people on IRC who indicated that they had the problem, where kernel stop at CD-ROM line, were also using root=/dev/sdbNN instead of root=/dev/hdbNN in their grub menu.lst. Is this something that has changed between kernel 2.6.20-12 and 2.6.20-13?

P.S> I would have liked in first place that during feisty install, when skipping the grub installation, the ubuntu installation should write a sample grub menul.lst file in /root updated for the system being installed.

thanks

Is there any information that could be usefull for you?