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535
March 25th, 2023 21:00
XPS 13 9310 Operating System Loader signature found in SecureBoot exclusion database
Today I created a recovery disc using the Dell Recovery tool and put it on a usb using Ubuntu's Startup Disk Creator. I tried to boot from it today and got an screen that as a Shutdown button with this message:
"Operating System Loader signature found in SecureBoot exclusion database ('dbx'). All bootable devices failed Secure Boot verification."
I thought maybe there was something wrong with the image so I used a previous recovery image from a year ago that I think worked at the time and that also failed with the same message.
I understand I could probably disable secure boot but I would rather not. Is there a correct fix I can make on my end or is this something Dell would update?
My laptop boots fine otherwise and is up to date with all firmware updates I've been notified about.
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DELL-Jesse L
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March 29th, 2023 08:00
charl3sd
To receive assistance from Dell support, they need to verify the warranty status and ownership. Click the "Get help now" icon on the right to start a live chat session. Provide to them the private Service Tag and all of your troubleshooting.
charl3sd
4 Posts
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March 30th, 2023 19:00
Hi Jesse,
I'm out of warranty but I'll see what they suggest. I was hoping for community guidance and/or if anyone else had a similar problem.