If 'savedefault' exists uncommented in a boot entry, the boot fails with Error 15: File not found. If that line is commented out or removed, the boot succeeds. This problem appeared to resemble http://bugs.gentoo.org/show_bug.cgi?id=112234, but I filed a new bug because that individual's grub.conf did not use savedefault. I had observed this problem months ago but simply tolerated it; I've entered this bug report now after re-emerging everything (long story, two weeks ago libc disappeared and I eventually had to repair with a LiveCD). grub version: grub (GNU GRUB 0.96) boot.conf: # # JustCost boot menu configuration file # splashimage=(hd0,1)/grub/fukukatana.xpm.gz timeout 20 default saved # For booting GNU/Linux title JustCost GNU/Linux root (hd0,1) kernel /vmlinuz root=/dev/hda4 #savedefault # For booting Windows NT or Windows95 title MSWindows rootnoverify (hd0,0) makeactive chainloader +1 #savedefault /etc/fstab: /dev/hda1 /mnt/win ntfs defaults,ro,user,uid=0,gid=6,umask=002 0 0 /dev/hda2 /boot ext3 noauto 1 2 /dev/hda3 none swap sw 0 0 /dev/hda4 / reiserfs defaults 0 1 none /proc proc defaults 0 0 none /dev/shm tmpfs defaults 0 0 /dev/cdroms/cdrom0 /mnt/cdrom/0 iso9660 noauto,ro,user,unhide 0 0 /dev/cdroms/cdrom1 /mnt/cdrom/1 iso9660 noauto,ro,user,unhide 0 0 /dev/floppy/0 /mnt/floppy vfat noauto,user 0 0 motherboard: EPoX EP-8KRAI-X: http://www.epox.com/USA/product.asp?ID=EP-8KRAI-X VIA Apollo KT600 Chipset, VT8237 southbridge. harddrive: Seagate Barracuda ATA IV, ST340016A emerge --info: Portage 2.1_pre7-r5 (default-linux/x86/2006.0, gcc-3.4.5, glibc-2.4-r1, 2.6.15-gentoo-r1-JustCost i686) ================================================================= System uname: 2.6.15-gentoo-r1-JustCost i686 AMD Sempron(tm) 2800+ Gentoo Base System version 1.6.14 dev-lang/python: 2.4.2 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=i686 -O2 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/share/X11/xkb /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/eselect/compiler /etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=i686 -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" MAKEOPTS="" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 3dnow 3dnowext X acpi alsa apache2 apm applet arts audiofile automount avi bash-completion berkdb bitmap-fonts bogofilter bootsplash bzip2 cairo calendar canna cdr cli crypt ctype cups dba dbm dio directfb dnd doc dri dvd eds elibc_glibc emboss encode escreen esd ethereal examples exif expat fam fastbuild firefox font-server fontconfig foomaticdb force-cgi-redirect fortran freetts freewnn ftp gb gcc-libffi gcj gd gdbm gif gimpprint glut glx gmp gnome gnome-print gnustep gphoto2 gpm gstreamer gtk gtk2 gtkhtml guile idn imlib insecure-savers ipv6 isdnlog jabber java javascript jpeg kde kernel_linux lcms lesstif libg++ libwww lua mad memlimit mikmod mng mono motif mouse mozilla mp3 mpeg mule ncurses nls nptl nptlonly nsplugin oav offensive ogg opengl oss pam pcre pdf pdflib perl plotutils png posix postgres pppd python qt quicktime readline samba scanner sdk sdl session simplexml slang soap sockets spell spl ssl tcltk tcpd threads tiff tokenizer truetype truetype-fonts type1-fonts udev unicode userland_GNU verbose vorbis xemacs xfs xft xine xml xml2 xmms xprint xscreensaver xsl xv zlib input_devices_keyboard input_devices_mouse video_cards_ati" Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
Your configuration is not useful or correct. Did you run grub-set-default X?, See this example: <snip> timeout 20 default saved fallback 1 # For booting GNU/Linux title JustCost GNU/Linux root (hd0,1) kernel /vmlinuz.new root=/dev/hda4 panic=5 savedefault fallback # For booting GNU/Linux title JustCost GNU/Linux (old kernel) root (hd0,1) kernel /vmlinuz.old root=/dev/hda4 savedefault </snip> Next, run # grub-set-default 0 Now, on reboot it will either boot the vmlinuz.new kernel and set the new default to 1 (i.e., vmlinuz.old kernel - you can check /boot/grub/default) - or, if booting vmlinuz.new fails with kernel panic, it will fallback to vmlinuz.old and again set the default to vmlinuz.old. Then you need to either re-run grub-set-default or change grub.conf to default to the new kernel if you wish to boot vmlinuz.new on next reboot.
