I have a similar issue trying to build a stock image using Raring.
The binary/isolinux/txt.cfg file contains the boot menu options with the names initrd.lz and vmlinuz like this:
default live
label live
menu label ^Try Ubuntu without installing
kernel /casper/vmlinuz
append file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
Nevertheless the names of the files inside the casper/ directory are: initrd.img-3.8.0-25-generic and vmlinuz-3.8.0-25-generic respectively.
So the bootloader can't find the files during boot time and shows the dialog message '/casper/vmlinuz' file not found, after pressing OK, it just stays in the splash menu.
I have a similar issue trying to build a stock image using Raring.
The binary/ isolinux/ txt.cfg file contains the boot menu options with the names initrd.lz and vmlinuz like this:
default live preseed/ ubuntu. seed boot=casper initrd= /casper/ initrd. lz quiet splash --
label live
menu label ^Try Ubuntu without installing
kernel /casper/vmlinuz
append file=/cdrom/
Nevertheless the names of the files inside the casper/ directory are: initrd. img-3.8. 0-25-generic and vmlinuz- 3.8.0-25- generic respectively.
So the bootloader can't find the files during boot time and shows the dialog message '/casper/vmlinuz' file not found, after pressing OK, it just stays in the splash menu.