hey gayal, something like this happened to me and i added the boot image and the initrd images to the /etc/boot/grub/menu.lst. okay if you can boot to fedora, try mounting the root partition of ubuntu. then cd to /boot/. open a nother terminal, and cd to /boot/ in fedora partition (to see the two partitions easily). this is my menu.lst to boot the ubuntu. (your details are differ from this) title Ubuntu, kernel 2.6.15-26-386 root (hd0,5) kernel /boot/vmlinuz-2.6.15-26-386 root=/dev/hda6 ro quiet splash initrd /boot/initrd.img-2.6.15-26-386 savedefault boot copy and past the ubuntu kernel image, root, initrd details from /boot in ubuntu and paste in to /boot/grub/menu.lst in fedora. ** make sure you havent delete the ubuntu partition when you install fedora. ;-) if you can't mount to either fedora or ubuntu, use a live cd (knoppix) and edit the grub. give it a try... worked for me. :-) good luck! <div>On 8/30/06, Gayal <<a href="mailto:gayal.rupasinghe@gmail.com">gayal.rupasinghe@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div>I was using Win XP with FC5 and wanted to install Ubuntu as well. So i deleted the FC5 partition (just for the fun of doing it) and installed ubuntu straight from the live cd V6.10. And my laptop dual booted perfectly with XP. After that i installed FC5 and during the creation of boot loader i added XP and Ubutu as well from there respective partitions. But then triple boot failed. This is the message i get when selected ubuntu from Fedora Core 5 Grub Menu ----------------------------------- Booting 'ubuntu' rootnoverify (hd0,6) chainloadre +1 Error 13: Invalid or Unsupported executable format. Press any key to continue so how can i fix this problem and tripple boot my laptop. my file systems are as follows: XP - NTFS ubuntu - reiserfs FC5 - Ext3 </div><div> -- Gayal Rupasinghe SRI LANKA (SU-APIIT) User #396462 <a href="http://counter.li.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> counter.li.org</a> </div> _______________________________________________ linux mailing list <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:linux@lug.lk">linux@lug.lk</a> <a onclick="return top.js.OpenExtLink(window,event,this)" href="https://secure.lug.lk/mailman/listinfo/linux" target="_blank"> https://secure.lug.lk/mailman/listinfo/linux</a> </blockquote></div> -- D. AnuradhA Step to the future with Open Source ! My Bolg : <a href="http://anutux.blogspot.com/">http://anutux.blogspot.com/ </a> My Photo Galary : <a href="http://www.flickr.com/photos/dasun">http://www.flickr.com/photos/dasun</a>