[ale] [EXTERNAL] Re: UEFI/NVME system won't boot after dead CMOS battery

[Bryan L. Gay]

Sounds like the boot entry for your Linux install was a custom entry
in the efivars which got wiped out when you removed the battery.
UEFI boots from the ESP a default entry that references this file:
EFI/BOOT/BOOTX64.EFI

This is the file that is typically going to boot Windows, but if
you're not dual-booting, then it won't exist unless you happened to
install and used the --removeable flag with the Grub installer.

I'd suggest looking at efibootmgr to re-create the proper entry.

On Sat, Mar 19, 2022 at 2:29 PM Allen Beddingfield via Ale <ale at ale.org> wrote:
>
> That was also my first thought, but secure boot is disabled.
>
> --
> Allen Beddingfield
> Systems Engineer
> Office of Information Technology
> The University of Alabama
> Office 205-348-2251
> allen at ua.edu
>
> ________________________________________
> From: Ale <ale-bounces at ale.org> on behalf of Boris Borisov via Ale <ale at ale.org>
> Sent: Saturday, March 19, 2022 9:01 AM
> To: Atlanta Linux Enthusiasts
> Cc: Boris Borisov
> Subject: [EXTERNAL] Re: [ale] UEFI/NVME system won't boot after dead CMOS battery
>
> Got to be some security feature I think. Some BRAND name motherboards have options to whitelist boot devices.
>
>
>
> On Fri, Mar 18, 2022, 22:57 DJPfulio--- via Ale <ale at ale.org<mailto:ale at ale.org>> wrote:
> NVMe isn't true or false.  Sometimes there are odd issues. Checking that the firmware is current, the current BIOS sees and can use it, and the OS works are 3 moving parts.
>
> On really new systems, these are the first things to validate if there are any issues.
>
> On 3/18/22 22:30, SpaXpert, Inc. via Ale wrote:
> > I'm not getting this. So it boots if you use cd boot and direct it to
> > load linux os from hd, and it works.  If nvme firmware was an issue,
> > would the opensuse boot disc still work?
> >
> > As previously suggested.. but why don't you have access to update the
> > mbr on the drive after getting it up and running with your
> > alternative boot method (cd)?  This is weird. Scratching head...
> > Doug.
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