On Thu, Oct 9, 2014 at 12:40 PM, Alex Nikitenko <alexzoidbergnikite...@gmail.com> wrote: > Hello. > > I was trying to bring up GRUB fallback feature on x86_64 based OpenWRT > build. > I used this article as a reference. > http://www.linuxscrew.com/2012/04/24/grub-fallback-boot-good-kernel-if-new-one-crashes/ > It's for Fedora, but I hope, that I can do something similar for openwrt. > > Here's my config: > > serial --unit=0 --speed=38400 --word=8 --parity=no --stop=1 > terminal_input console serial; terminal_output console serial > > > set default="saved" > set timeout="5" > set root='(hd0,msdos1)' > set fallback="0 1" > > menuentry "OpenWrt" { > linux /boot/vmlinuz root=/dev/sda2 rootfstype=ext4 rootwait > console=tty0 console=ttyS0,38400n8 noinitrd > savedefault fallback > } > > menuentry "OpenWrt-backup" { > linux /boot/vmlinuz-backup root=/dev/sda3 rootfstype=ext4 rootwait > console=tty0 console=ttyS0,38400n8 noinitrd > savedefault fallback > } > > menuentry "OpenWrt (failsafe)" { > linux /boot/vmlinuz failsafe=true root=/dev/sda2 rootfstype=ext4 > rootwait console=tty0 console=ttyS0,38400n8 noinitrd > } > > But, when I try to boot openwrt with this config I get message, that > command is not recognized. > > Booting `OpenWrt' > error: can't find command `savedefault'.
savedefault is function defined in /etc/grub.d/00_header which is used by grub-mkconfig. If you do not use grub-mkconfig, you need to simply use save_env explicitly or copy function in your grub.cfg. > Press any key to continue... > > I believe, that in order to make fallback feature work, I need loadenv > module enabled. I enabled it, but it didn't help. > I also found an information, that I might be getting troubles with > savedefault because my kernel and rootfs are stored on 4GB USB stick. Is > this a problem? > Can I reconfigure a grub somehow in order to have this feature? > > Thanks, > Alex > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel > _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
