Here is a listing of the burg -r 1778 modules for grub pc build which I am using to run sora.
You should have them all in /boot/grub/, or else need to reinstall burg (grub-install).
The standard ubuntu modules will not run the burg menu or sora. Possibly an update may have overwritten burg modules and boot code.
pxw@im:~/src/burg/burg78/build-pc$ ls -l *.mod
8915 2009-11-24 14:05 acpi.mod
3562 2009-11-24 14:05 affs.mod
3927 2009-11-24 14:05 afs_be.mod
3989 2009-11-24 14:05 afs.mod
393 2009-11-24 14:05 aout.mod
6569 2009-11-24 14:05 ata.mod
1276 2009-11-24 14:05 ata_pthru.mod
1391 2009-11-24 14:05 at_keyboard.mod
3856 2009-11-24 14:05 befs_be.mod
3896 2009-11-24 14:05 befs.mod
3080 2009-11-24 14:05 biosdisk.mod
4543 2009-11-24 14:05 bitmap.mod
1129 2009-11-24 14:05 blocklist.mod
1509 2009-11-24 14:05 boot.mod
17237 2009-11-24 14:05 bsd.mod
1140 2009-11-24 14:05 bufio.mod
919 2009-11-24 14:05 cat.mod
1265 2009-11-24 14:05 chain.mod
1186 2009-11-24 14:05 cmp.mod
877 2009-11-24 14:05 configfile.mod
14625 2009-11-24 14:05 coreui.mod
1942 2009-11-24 14:05 cpio.mod
638 2009-11-24 14:05 cpuid.mod
622 2009-11-24 14:05 crc.mod
760 2009-11-24 14:05 datehook.mod
1276 2009-11-24 14:05 date.mod
628 2009-11-24 14:05 datetime.mod
860 2009-11-24 14:05 dm_nv.mod
4103 2009-11-24 14:05 drivemap.mod
957 2009-11-24 14:05 echo.mod
20366 2009-11-24 14:05 efiemu.mod
3433 2009-11-24 14:05 elf.mod
6245 2009-11-24 14:05 emenu.mod
4534 2009-11-24 14:05 ext2.mod
2868 2009-11-24 14:05 extcmd.mod
4634 2009-11-24 14:05 fat.mod
5972 2009-11-24 14:05 font.mod
1171 2009-11-24 14:05 fs_file.mod
1936 2009-11-24 14:05 fshelp.mod
1178 2009-11-24 14:05 fs_uuid.mod
2784 2009-11-24 14:05 gfxrgn.mod
6936 2009-11-24 14:05 gfxterm.mod
2696 2009-11-24 14:05 gptsync.mod
6860 2009-11-24 14:05 gzio.mod
499 2009-11-24 14:05 halt.mod
1180 2009-11-24 14:05 handler.mod
5703 2009-11-24 14:05 hdparm.mod
360 2009-11-24 14:05 hello.mod
1153 2009-11-24 14:05 help.mod
1378 2009-11-24 14:05 hexdump.mod
4777 2009-11-24 14:05 hfs.mod
4975 2009-11-24 14:05 hfsplus.mod
4905 2009-11-24 14:05 iso9660.mod
4593 2009-11-24 14:05 jfs.mod
5320 2009-11-24 14:05 jpeg.mod
33128 2009-11-24 14:05 kernel.mod
948 2009-11-24 14:05 keystatus.mod
15894 2009-11-24 14:05 lib.mod
3632 2009-11-24 14:05 linux16.mod
7053 2009-11-24 14:05 linux.mod
975 2009-11-24 14:05 loadcfg.mod
4229 2009-11-24 14:05 loadenv.mod
1881 2009-11-24 14:05 loopback.mod
485 2009-11-24 14:05 lsmmap.mod
2788 2009-11-24 14:05 ls.mod
3132 2009-11-24 14:05 lspci.mod
81624 2009-11-24 14:05 lua.mod
4435 2009-11-24 14:05 lvm.mod
864 2009-11-24 14:05 mdraid.mod
1107 2009-11-24 14:05 memdisk.mod
1447 2009-11-24 14:05 memrw.mod
3103 2009-11-24 14:05 minicmd.mod
3396 2009-11-24 14:05 minix.mod
6756 2009-11-24 14:05 mmap.mod
1411 2009-11-24 14:05 msdospart.mod
12300 2009-11-24 14:05 multiboot.mod
18323 2009-11-24 14:05 nmenu.mod
3877 2009-11-24 14:05 normal.mod
2323 2009-11-24 14:05 ntfscomp.mod
7481 2009-11-24 14:05 ntfs.mod
3318 2009-11-24 14:05 ohci.mod
1257 2009-11-24 14:05 part_acorn.mod
1309 2009-11-24 14:05 part_amiga.mod
1722 2009-11-24 14:05 part_apple.mod
1746 2009-11-24 14:05 part_gpt.mod
2569 2009-11-24 14:05 part_msdos.mod
1325 2009-11-24 14:05 part_sun.mod
3313 2009-11-24 14:05 parttool.mod
957 2009-11-24 14:05 password.mod
291 2009-11-24 14:05 pci.mod
1123 2009-11-24 14:05 play.mod
5515 2009-11-24 14:05 png.mod
1600 2009-11-24 14:05 probe.mod
1007 2009-11-24 14:05 pxecfg.mod
1812 2009-11-24 14:05 pxecmd.mod
2589 2009-11-24 14:05 pxe.mod
496 2009-11-24 14:05 raid5rec.mod
1827 2009-11-24 14:05 raid6rec.mod
4822 2009-11-24 14:05 raid.mod
645 2009-11-24 14:05 read.mod
326 2009-11-24 14:05 reboot.mod
8637 2009-11-24 14:05 reiserfs.mod
2233 2009-11-24 14:05 scsi.mod
2306 2009-11-24 14:05 search.mod
4406 2009-11-24 14:05 serial.mod
134 2009-11-24 14:05 setjmp.mod
3031 2009-11-24 14:05 sfs.mod
9117 2009-11-24 14:05 sh.mod
1105 2009-11-24 14:05 sleep.mod
1861 2009-11-24 14:05 tar.mod
8206 2009-11-24 14:05 terminfo.mod
4173 2009-11-24 14:05 test.mod
1855 2009-11-24 14:05 tga.mod
461 2009-11-24 14:05 true.mod
1032 2009-11-24 14:05 txtrgn.mod
4014 2009-11-24 14:05 udf.mod
3754 2009-11-24 14:05 ufs1.mod
4099 2009-11-24 14:05 ufs2.mod
3725 2009-11-24 14:05 uhci.mod
2225 2009-11-24 14:05 usb_keyboard.mod
3057 2009-11-24 14:05 usb.mod
2609 2009-11-24 14:05 usbms.mod
1918 2009-11-24 14:05 usbtest.mod
1620 2009-11-24 14:05 vbeinfo.mod
4666 2009-11-24 14:05 vbe.mod
2036 2009-11-24 14:05 vbetest.mod
2703 2009-11-24 14:05 vga.mod
1758 2009-11-24 14:05 vga_text.mod
13565 2009-11-24 14:05 video_fb.mod
4007 2009-11-24 14:05 video.mod
2679 2009-11-24 14:05 videotest.mod
14513 2009-11-24 14:05 widget.mod
4894 2009-11-24 14:05 xfs.mod
21391 2009-11-24 14:05 xnu.mod
3219 2009-11-24 14:05 xnu_uuid.mod
pxw@im:~/src/burg/burg78/build-pc$
--
Cros (pxw)