"gfxboot.c32 not com32r" error in "ubuntu-15.04-desktop-amd64.iso"!

Extracting the new "usb-creator-gtk" (Startup Disk Creator) from Ubuntu 15.04 ISO will it run under Ubuntu 14.04 or less?

Cause using old "Startup Disk Creator" will fail when booting, and a simple solution if your ISO download after boot is giving the error:

missing parameter configuration file keyword path
gfxboot.c32 not com32r
boot>

First install using "Startup Disk Creator" then replace files in the "Startup Disk USB CD installation"!

Just replace the three ".c32" files inside "/syslinux" folder, with copies of your current Ubuntu from "/usr/lib/syslinux/" folder, or old ".c32" files from old ISO working copy, like 14.10, or 14.04, or 13.10, or 13.04, and if old ISO copy do not have "syslinux" folder the three files are in the "isolinux" folder:

/usr/lib/syslinux/chain.c32 <copy to and replace> /syslinux/chain.c32
/usr/lib/syslinux/gfxboot.c32 <copy to and replace> /syslinux/gfxboot.c32
/usr/lib/syslinux/vesamenu.c32 <copy to and replace> /syslinux/vesamenu.c32

or from old ISO:

/syslinux/chain.c32 <copy to and replace> /syslinux/chain.c32
/syslinux/gfxboot.c32 <copy to and replace> /syslinux/gfxboot.c32
/syslinux/vesamenu.c32 <copy to and replace> /syslinux/vesamenu.c32

or other old ISO:

/isolinux/chain.c32 <copy to and replace> /syslinux/chain.c32
/isolinux/gfxboot.c32 <copy to and replace> /syslinux/gfxboot.c32
/isolinux/vesamenu.c32 <copy to and replace> /syslinux/vesamenu.c32

If you get permission deny, use "sudo cp -b -i -t ...USBPATH.../syslinux/ /usr/lib/syslinux/*.c32".

There are other three ".c32" files but did not find matches, and it boots fine without them:
/syslinux/ldlinux.c32
/syslinux/libcom32.c32
/syslinux/libutil.c32

All these six ".c32" files are inside the "Startup Disk USB CD installation" in file "/casper/filesystem.squashfs", and after opening it with "Disk Image Mounter" one can view the files, on folder "bios" or "elf" in "/usr/lib/syslinux/modules/".

The problem is that "ubuntu-15.04-desktop-amd64.iso" needs a new version of "Startup Disk Creator" "https://bugs.launchpad.net/bugs/1325801"!

I have made the final installation into HDD, first boot runs ok, and everything seems ok, which means that "ldlinux.c32", "libcom32.c32", and "libutil.c32", are not needed or run in the installation process... Now I can run the new "Startup Disk Creator" and make a new "Startup Disk USB CD Installation" that works! :)

And if I have found this early I could avoid installing to HDD twice, by booting the "Startup Disk USB CD Installation", and choose "Try Ubuntu" and there run again the "Startup Disk Creator" to create another "Startup Disk USB CD Installation" that works...

#ubuntu #desktop #download #15.04 #iso #com32r #error #missing #parameter #path