Comment 2 for bug 1781788

UPDATE 2018-jul 15 @ 15:20:
1st time installation steps:
18.04 install
  - normal installation
  - download updates while installing ubuntu
  - partition ext4 /boot 4096Mb /format
  - partition efi 4096Mb
  - partition swap 32768Mb
  - partition ext4 / 51199Mb /format
  - partition ext4 /home 20479Mb /format
  - write changes to disk? >> continue
  - where are you >> <user_location>
  - Who are you ? >> <user_name>
  - during user info >> Installer Crashed
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2nd installation steps, here I changed the order of the swap-partition and root-partition:
  - normal installation
  - download updates while installing ubuntu
  - partition ext4 /boot 4096Mb /format
  - partition efi 4096Mb
  - partition ext4 / 51199Mb /format
  - partition swap 32768Mb
  - partition ext4 /home 20479Mb /format
  - write changes to disk? >> continue
  - where are you >> <user_location>
  - Who are you ? >> <user_name>
  - during user info >> Installer Crashed
------------------
3rd attempt:
  - in start-up menu I choose the option "check disk for errors". At the end of this process 1 file was mentioned as "corrupt" ( I don't know which one ). On my 2nd PC downloaded the 18.04 installer ISO. Re-created a start-up disk on my 2Gb USD-drive. I also tested the USB-drive (got the QMEU box), so it looked OKAY. Rebooted my AMD Ryzen system with the newly created USB-drive. I repeated the 2nd installation steps. Ate the point "Who are you", I choose very simple short user-name and computer-name. And after this the installation worked like a charm :)

So maybe solution to the problem:???
- new USB-drive installation
- very simple user-information

My AMD-Ryzen is now up and running :)
Thanks!!!