Problem:
  tpm_clear --force
  [...] TPM is disabled
Solution:
  Go into BIOS and enable the TPM chip.
---
Problem:
  tpm_clear --force
  TPM Successfully Cleared. You need to reboot to complete this operation.
  After reboot the TPM will be in the default state: unowned,
  disabled and inactive.
Solution:
  Reboot.
---
Problem
  tpm_clear --force
  [...] Bad physical presence value
Solution
  Reset using a cold boot and the BIOS. See below.
---
Problem
  stpm-keygen -o my.key
  [...] TPM is defending against dictionary attacks and is in some time-out period
Solution
  tpm_resetdalock
---
Problem
  One of the solutions assumes I know the owner password, and I don't.
Solution
  1) Shut off the machine. Reboot will not do. Power it down.
  2) Boot the machine and enter the BIOS.
  3) In the BIOS, find "Clear TPM chip" and run that.
  4) Boot the OS and start from scratch with tpm_takeownership.
---
Problem
  Key not found in persistent storage.
Solution
  Did you reboot after clearing/taking ownership? Try that first.
---
Problem
  stpm-keygen -o my.key
  Tspi_Context_LoadKeyByUUID: Code=0x00002020: tcs: Key not found in persistent storage
Solution
  Is the TPM chip active? Check with tpm_getpubek. If it says it's
  inactive you may need to turn it on in the BIOS. If that doesn't
  work, try clearing it and starting from scratch.
---
Problem
  After re-installation of the operating system the key is not found.
  $ ssh server
  C_GetTokenInfo failed: 6 no keys
Solution
  The base library trousers saves some part of the key on the local filesystem.
  https://sourceforge.net/p/trousers/mailman/message/28828649/
  Copy the file /var/lib/tpm/system.data as root to your new system.
