Comment 15 for bug 1883785

The Inspiron 3593 does not have a dedicated Trusted Platform Module (TPM 2.0), but instead the successor Intel® Platform Trust Technology (Intel® PTT). Disabling this PTT in BIOS security settings has *NOT* improved anything.

Workaround #1 does not work for me.
Entering 'rmmod tpm' leads to 'command failed', like most of other commands too.

For me workaround #2 (unloading tpm module) seems to work. Boot never failed since the last 2 days and around 20 cold and warm reboots.

I suspect the root cause in my case was the automatic the update of the grub-efi-amd64-bin from 2.02 (bionic-security) to 2.04 (bionic-updates). I have not yet tried a downgrade of the packages due to limited access to the device.