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Re: Request for help - Debian UEFI not possible after starting windows



Hi Robert,

On Sat, Apr 04, 2020 at 08:42:42PM +0200, Robert Gomułka wrote:
>
>Do you have any idea of how to debug/fix it? Even if Windows somehow
>messes my bios settings, I still can boot from Debian Live in UEFI
>mode. But can't do the same for my Debian pendrive. Is there something
>I can do to make my pendrive appear the same way as Debian Live?
>Fixing it each time is inconvenient...

Your tale makes it sound very like something in the Wondows boot chain
is cleaning up boot entries that it doesn't like, including (maybe?)
anything on an external drive.

>A friend of mine uses very similar setup, but with Ubuntu - in his
>case menu entry doesn't disappear after booting to Windows.

By default it looks like Ubuntu installs a copy of Grub to the
removable media path, (the location Mario described). We *don't* do
that by default in Debian, but the system can be configured to do it
to work around firmware implementations that are broken like this. The
best way to do that is, from your running Debian system:

$ sudo dpkg-reconfigure -plow grub-efi-amd64

and run through the configuration options there. When it asks "Force
extra installation to the EFI removable media path?" say *yes*. That
will likely fix your issue.

-- 
Steve McIntyre, Cambridge, UK.                                steve@einval.com
"... the premise [is] that privacy is about hiding a wrong. It's not.
 Privacy is an inherent human right, and a requirement for maintaining
 the human condition with dignity and respect."
  -- Bruce Schneier


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