*** This bug is a duplicate of bug 1767703 ***
https://bugs.launchpad.net/bugs/1767703
I was able to successfully install after writing the 18.04.2 ISO file to
the raw USB drive. After booting into the Live environment, gdisk
report that the partition table is an invalid GPT:
root@ubuntu:~# gdisk -l /dev/sda
GPT fdisk (gdisk) version 1.0.3
Partition table scan:
MBR: MBR only
BSD: not present
APM: not present
GPT: not present
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************
Disk /dev/sda: 30949376 sectors, 14.8 GiB
Model: MKNUFDVT16GB
Sector size (logical/physical): 512/512 bytes
Disk identifier (GUID): E7796633-0224-47BE-98DE-9174127D174C
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 30949342
Partitions will be aligned on 4-sector boundaries
Total free space is 30944381 sectors (14.8 GiB)
Number Start (sector) End (sector) Size Code Name
2 3830956 3835883 2.4 MiB EF00 EFI System
root@ubuntu:~$
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https://bugs.launchpad.net/bugs/1767259
Title:
ubuntu 18.04 The 'grub-efi-amd64-signed' package failed to install
into / targer.
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