I suspected that might be the case, but given the nature of what's stored 
there, mucking about with it could be bad (and indeed, others pointed out 
instances where systems were bricked by deleting the wrong thing).
 

Hi Jim,

After reading all the comments in this discussion, I wondering if there is a bigger issue going on here.

When I first saw your message, I did a df -h /sys/firmware/efi/efivars to see what mine was and found that the size is 192k.

While I did not save the output the percent used was like 27% and I thought good, I've got plenty of room of room.

Then I did a fwupdmgr get-updates and had one for the dbx for the MS issue.
Then I did a fwupdmgr update and after that I did the 

	df -h /sys/firmware/efi/efivars

	Filesystem      Size  Used Avail Use% Mounted on
	efivarfs        192K  167K   21K  89% /sys/firmware/efi/efivars

Now it is 89% Used with only 21K still available !

Here's a list of all the things that are > 1k in size:

-rw-r--r-- root     root            3/21/2024 13:15           1,438 SaSetup-72c5e28c-7783-43a1-8767-fad73fccafa4
-rw-r--r-- root     root            3/21/2024 13:15           2,042 MokListRT-605dab50-e046-4300-abb6-3dd810dd8b23
-rw-r--r-- root     root            3/21/2024 13:15           2,069 PchSetup-4570b7f1-ade8-4943-8dc3-406472842384
-rw-r--r-- root     root            3/21/2024 13:15           3,400 Setup-ec87d643-eba4-4bb5-a1e5-3f3e36b20da9
-rw-r--r-- root     root            3/21/2024 13:15           3,577 KEKDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root     root            3/21/2024 13:15           3,577 KEK-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root     root            3/21/2024 13:15           3,714 BiosSettingMappingTableV2-b57086d5-c2e5-4654-9e3a-0b55830fbb32
-rw-r--r-- root     root            3/21/2024 13:15           6,326 db-d719b2cb-3d3a-4596-a3bc-dad00e67656f
-rw-r--r-- root     root            3/21/2024 13:15           6,326 dbDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root     root            3/21/2024 13:15          10,448 dbxDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root     root            3/21/2024 13:15          17,964 dbx-d719b2cb-3d3a-4596-a3bc-dad00e67656f
-rw-r--r-- root     root            3/21/2024 13:15          23,216 VARSTORE_OCMR_SETTINGS_NAME-a3a3b874-7636-4182-ba1e-f52c584494e3
-rw-r--r-- root     root            3/21/2024 13:15          33,481 StdDefaults-4599d26f-1a11-49b8-b91f-858745cff824

With the large jump in percent used, could there be an issue with fwupdmgr that is causing your issue ?


Regards,

Joe