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On a double-boot laptop with Ubuntu 25.04, I can open the Firmware updater app (when connected to power supply) and see that both the System Firmware and the UEFI dbx require updating. I can update and reboot as prompted by the app, but after rebooting there is no updated version (it is still the old version I was trying to update from) and the same update is required. I do not receive any error message.

I have also tried sudo fwupdmgr update from terminal but it turns out the same way as above. What should I do to update?

EDIT: as per request, I am on a Dell Precision 5490,

$ sudo dmidecode -t 2
# dmidecode 3.6
Getting SMBIOS data from sysfs.
SMBIOS 3.6 present.

Handle 0x0200, DMI type 2, 17 bytes
Base Board Information
    Manufacturer: Dell Inc.
    Product Name: 05PYJX
    Version: A00
    Serial Number: /7M35674/CNCMK004BQ002D/
    Asset Tag: Not Specified
    Features:
        Board is a hosting board
        Board is replaceable
    Location In Chassis: Not Specified
    Chassis Handle: 0x0300
    Type: Motherboard
    Contained Object Handles: 0
Py-ser
  • 687

1 Answers1

2

According to this Reddit post, you should update your BIOS. If that doesn't work, reset secure boot keys.

Edit: for updating your BIOS I found some links:

BIOS image

Note: Be careful, I don't know if this is the right one for your computer, although I got it from the official Dell website.

BIOS image source

How to flash BIOS

And for resetting Secure Boot keys:

Seems like you can go to the Secure Boot section of the BIOS and select Reset All Keys.

Instructions for a different laptop

user7215
  • 216
  • 7