Adam, there's a bug in your version of the patch "efi_disk_cache.patch":
+#define GRUB_DISK_CACHE_SIZE 1024 +#define GRUB_DISK_CACHE_BITS 8 <---- SHOULD BE "10" You may have been misled by Manoj's suggestion of trying BITS==8... But note that 2^BITS must be kept == SIZE which isn't the case in your version of the patch. Anyway, I have determined that BITS==10, SIZE==1024 is a good value performance-wise (and the blog poster suggests even higher: BITS==13). I recommend that we stick with BITS==10, SIZE==1024. ** Changed in: grub2 (Ubuntu) Status: Fix Released => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/944347 Title: linux and initrd load very slowly on UEFI system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/944347/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs