* Alexander 'Leo' Bergolth leo@strike.wu.ac.at [Thu Jun 17, 2010 at 09:46:28PM +0200]:
Is there a way to make grub jump to the existing /boot/grub/grub.cfg in the ISO and show its contents as a submenu?
I am trying to branch to grmls own grub configuration: -------------------- 8< -------------------- loopback loop $iso_path set root=(loop) configfile /boot/grub/grub.cfg -------------------- 8< --------------------
... which seems to fail because of a bug in grub. (set root=(loop) fails) See http://savannah.gnu.org/bugs/?30143 for the bug report.
As a workaround, I suggested to prepend a variable like ${loop} to all paths in grmls grub.conf, which could be set to loop="(loop)" by the calling grub.cfg on the usb drive. Besides a variable like ${kernelopts} at the end of each kernel commandline would allow passing custom boot options from the calling grub.cfg.
Jordan Uggla pointed out on #grml that it's working for him with grub 1.98 compiled from source.
Instead of working around I'd prefer to see this bug fixed in Grub. I've just updated templates/boot/grub/ to the most recent Grub2 version from Debian/unstable and also added support for "${kernelopts}" (what a lovely idea! :)):
http://git.grml.org/?p=grml-live.git;a=commit;h=07ca6d5
The daily ISOs (http://daily.grml.org/) by tomorrow (2010-06-26) will include this update. Would be great to get know whether this fixes your issue.
regards, -mika-