UEFI boot fails...

[Liam Proven]

On Tue, 31 Aug 2021 at 16:54, Jacques Beigbeder
<Jacques.Beigbeder at ens.fr> wrote:
>
> liam> I do not know much about UEFI booting -- just enough to dislike it. I
> liam> find it complicated to get working correctly, and fragile when it
> liam> does.
>
> I agree, but modern PC don't have legacy any more.

I do not have much contact with super-modern kit any more (I used to,
long ago, in a previous job) but I have yet to see a PC that could
_not_ do it at all.

> So???

I do not know what to tell you. I recently broke UEFI on my office
Dell Precision 5810 minitower upgrading one of its 2 Linux installs. I
*only* got Linux to boot on that machine by installing Win10 first. A
colleague & I spent 2 weeks trying about 5-10 distros, many different
things. No joy.

Then, with Win10 & its ESP in place, Linux booted perfectly.

Until I broke it.

So, this time, I repartitioned with MBR and reinstalled in legacy boot
mode, and now everything just works, perfectly.

On my girlfriend's old PC (Lenovo mini tower, Core i5), Mint 19's GRUB
did not appear unless I pressed F12 to choose boot device. Then it
appeared. Win10 was fine, it worked fine, I updated the firmware --
nothing worked. I tried a lot of troubleshooting for days.

Then I updated it to Mint 15.2 and bing, suddenly, GRUB just worked.

Later I upgraded it to a newer Win10 -- still OK. Then to Mint 20: still fine.

Who knows? Maybe there is a bug and a later version of Ubuntu fixed it.

-- 
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