[Bug 2034705] Re: efivar fails to read variables

[Olivier Gayot]

Subiquity users trying to install 23.10 on Apple hardware (amd64) have
been running into problems as well because of this issue.

Thank you Heinrich for sending the patch upstream!

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Title:
  efivar fails to read variables

Status in efivar package in Ubuntu:
  Invalid
Status in linux-meta package in Ubuntu:
  New
Status in linux-meta-riscv package in Ubuntu:
  In Progress

Bug description:
  On riscv64 StarFive VisionFive 2 with U-Boot v2023.10-rc4 and kernel
  6.5.0-2-generic we see this output:

  
  root at ubuntu-server:/var# ls /sys/firmware/efi/efivars/
  AuditMode-8be4df61-93ca-11d2-aa0d-00e098032b8c
  DeployedMode-8be4df61-93ca-11d2-aa0d-00e098032b8c
  OsIndicationsSupported-8be4df61-93ca-11d2-aa0d-00e098032b8c
  PlatformLang-8be4df61-93ca-11d2-aa0d-00e098032b8c
  PlatformLangCodes-8be4df61-93ca-11d2-aa0d-00e098032b8c
  SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c
  SetupMode-8be4df61-93ca-11d2-aa0d-00e098032b8c
  VendorKeys-8be4df61-93ca-11d2-aa0d-00e098032b8c

  root at ubuntu-server:/var# efivar -l
  efivar: error listing variables: Function not implemented

  root at ubuntu-server:/var# efibootmgr -v
  EFI variables are not supported on this system.

  Expected behavior would be to display the variables.

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