I'm using Ubuntu Studio 24.04 on an older ASUS X99-A/USB 3.1 motherboard. UEFI updates fail with efivarfs errors saying either “Invalid argument” or “Cannot allocate memory.” What could be causing this, and what can I try?
Why do UEFI firmware updates keep failing on Ubuntu Studio?
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d6~telex_829
Answers
One possibility is that the motherboard's EFI variable storage is too full or too small for the current Secure Boot revocation list. That list has grown over time, and older firmware can have limited space for it.
If you've added custom Secure Boot certificates, removing ones you no longer need may free space. Some firmware setup menus also offer a factory reset for Secure Boot keys. Check what that option does on your board before using it, since resetting keys can affect systems that rely on custom certificates.
The errors alone don't prove that storage is the problem, though. The invalid argument message could also need further investigation.
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