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I'm trying to install Ubuntu alongside Windows 10 on a Lenovo 720 13" and I get the error in the title.

MODSIGN: Couldn't get size: 0x800000000000000e

I looked for similar cases 1 2 3 4 5 6 7. I'm sure there are many more, so if I missed a solution, please point it out, but unfortunately the proposed solutions didn't seem to be effective in my case.

I tried:

  • Secure Boot both enabled and disabled

  • Fast Boot both enabled and disabled

  • with and without creating empty space on the SSD

  • Creating an ext4 partition from Windows

  • Ubuntu 18.04 and 16.04

The result is always the same. The installation doesn't recognize any partition, but mysterious 8.2GB (my RAM?) which are < to the 8.6 required.

The live version of Ubuntu runs, but even GParted doesn't recognize any disk apart the USB drive.

I apologize if I have missed a solution but there are many similar cases. Maybe the pictures in this album can represent the situation better than my words. I suspect the issue might be related to Lenovo, so I'm also bothering them here.

karel
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Francesco Iapicca
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2 Answers2

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I ran into the same problem on an empty disk. At first I thought the software didn't recognize my M.2 SSD, but it was completely different. I managed to get the live system running. Then I created an ESP partition, an ext4 partition and separate /home partition with GParted. With another live CD, Super Grub2 Disk, I installed grub. After that I retried again with Ubuntu 18.04 bootable media. I got some kind of command line interface, added the nomodeset kernel boot option at the end of "Linux", pressed F10 to continue, and off it went. It seems to be a known bug in Ubiquity. Nevertheless, 20 minutes later I was up and running.

karel
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Dirk
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Credit for the solution to oldfred the missing piece was switching from RAID to AHCI which I did following this. (Writing this answer from Bionic Beaver) Thanks everyone for the help

Francesco Iapicca
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