Sorry all. Something happened while I was typing in the comment.
The bug has also affected me on Ubuntu 18.04.3 LTS. I finally fixed it as described in comment #17.
Maybe unrelated but FYI. My installation is using UEFI but I need to keep the bios in legacy mode and then select Ubuntu (UEFI) to boot properly. If I set the BIOS to boot using UEFI directly, the fix still fails for me.
Sorry all. Something happened while I was typing in the comment.
The bug has also affected me on Ubuntu 18.04.3 LTS. I finally fixed it as described in comment #17.
Maybe unrelated but FYI. My installation is using UEFI but I need to keep the bios in legacy mode and then select Ubuntu (UEFI) to boot properly. If I set the BIOS to boot using UEFI directly, the fix still fails for me.