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Is there a simple way to update Bios?
#1
I bought a pair of refurbed Dell Optiplexs (a 990 and 7020) but blew away Windows before I realized I should have updated the bios. Both are running Mint 19.2 with Legacy boot and Secure boot turned off. Can I turn UEFI on and attempt to update the bios, then return to Legacy boot? If it's going to really complicate things, I'll just leave the old bios in place.
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#2
*Edit: (Sorry, I misread your question about switching on / off UEFI.  I really don't know how that would affect things after an install, but I'll leave the links for anyone else just wondering how to flash a BIOS on a Dell.)

Most Dells built after 2012 have a BIOS flash update option available in the F12 boot menu.  Not sure about anything before 2012, but check the F12 menu first.

https://www.dell.com/support/article/us/...nu?lang=en

Post 2015, "If your system is listed at https://fwupd.org/lvfs/devicelist [Image: iC_External_Link_BD_v1.jpg] then it supports UEFI capsule updates and can be updated natively within the OS."

https://www.dell.com/support/article/us/...ts?lang=en
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#3
(09-09-2019, 11:20 AM)Eurus Wrote: *Edit: (Sorry, I misread your question about switching on / off UEFI.  I really don't know how that would affect things after an install, but I'll leave the links for anyone else just wondering how to flash a BIOS on a Dell.)

Most Dells built after 2012 have a BIOS flash update option available in the F12 boot menu.  Not sure about anything before 2012, but check the F12 menu first.

https://www.dell.com/support/article/us/...nu?lang=en

Post 2015, "If your system is listed at https://fwupd.org/lvfs/devicelist [Image: iC_External_Link_BD_v1.jpg] then it supports UEFI capsule updates and can be updated natively within the OS."

https://www.dell.com/support/article/us/...ts?lang=en

The 7010 tower was manufactured in 2014 but does not have the flash bios option on the one time boot screen after pressing F12. UNetbootin described in Dells instruction page doesn't seem to be available on the Mint software page. I guess I'll just use the old bios for now.
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#4
I guess, unfortunately, your PC hits a gap; the first guide says "most" after 2012, and the second guide, written later says, "all Dell systems from 2015 and later."  That's too bad.  Maybe try a Dell forum for another solution.


Not sure why UNetbootin isn't showing up in Mint's software manager, though; they definitely still list Mint on their site:

https://unetbootin.github.io/#distros
 
For anyone else trying to flash a Dell BIOS, it probably doesn't matter what USB flash tool you use, as long as it has the same features / settings required in the guide.  Also, I doubt the guide has been updated since it was first written by Dell, so the latest available version of UNetbootin may also look different and have a different menu than the guide depicts in the figures and steps — that goes for the latest Dell F12 boot menu, too.
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#5
(09-09-2019, 11:50 PM)Eurus Wrote: I guess, unfortunately, your PC hits a gap; the first guide says "most" after 2012, and the second guide, written later says, "all Dell systems from 2015 and later."  That's too bad.  Maybe try a Dell forum for another solution.


Not sure why UNetbootin isn't showing up in Mint's software manager, though; they definitely still list Mint on their site:

https://unetbootin.github.io/#distros
 
For anyone else trying to flash a Dell BIOS, it probably doesn't matter what USB flash tool you use, as long as it has the same features / settings required in the guide.  Also, I doubt the guide has been updated since it was first written by Dell, so the latest available version of UNetbootin may also look different and have a different menu than the guide depicts in the figures and steps — that goes for the latest Dell F12 boot menu, too.

FreeDos is also a different version now and the terminology is different. I managed to get UNetbootin from a PPA but there is so much uncertainty, I'm afraid of bricking my system. I'm not a power user so I guess Bios A16 will do. The current version is A29. Some guides I've seen indicate you can't jump that many revisions and may need to update each one one at a time. That's a lot of opportunity to screw up.
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#6
I don't blame you for being cautious.  Seems sensible.  Maybe someone in a Dell forum has had to flash an older system and can offer some advice.

Best of Luck!
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