Marc Chamberlin composed on 2024-09-18 21:08 (UTC-0700):

I dunno why I am suddenly not able to send emails from my email server to this list, everything is bouncing back to me. So I am going to try from a different computer to see if that helps. Sorry if this turns into a duplicate post, not my intention!

Hi,  I have a Dell laptop that I had set up to dual boot OpenSuSE 15.5 and Windows 11.  Recently, upon powering up my laptop, I got a notice saying the time had not been properly set up in the BIOS. So, for the first time, I figured out how to open up the BIOS settings, took a look at the time setting, and was puzzled to find it was OK. When I exited the BIOS setup the laptop then directly booted up the Windows 11 system. Powering off, then back on resulted in the same behavior, the GRUB menu that allowed me to select which system to boot up, no longer appears. Near as I can figure, something about bringing up the BIOS menu destroyed the Grub boot menu!

Any ideas on what the heck is going on with Dell's Bios? I am trying to ask Dell this question, but so far no response.

What is the best way for restoring GRUB and get back my ability to boot up OpenSuSE?

Grub is probably just fine. Recent Windows updates have often corrupted NVRAM, with different effects, and fixes, depending on the particular BIOS. First thing to try is simply hitting F12 before POST completes, to bring up the BBS menu. openSUSE EFI should still be present there. If so, select it and proceed. It may boot openSUSE once, then back to Windows next time. If so, goto next paragraph, skipping the if clause. If there is no openSUSE option in BBS menu, go back into BIOS setup and confirm both the boot order, and whatever the menu selection is called where there are two choices: 1-Windows; 2-Other OS. It will probably show Windows, and you probably need it to be Other OS. -- Evolution as taught in public schools is, like religion, based on faith, not based on science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata