Host stuck at grub on reboot
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When I reboot a host (a Dell 3680 workstation that we use for its graphics cards forwarded to VMs) it stops at the grub menu. We can hit enter to proceed and it works as usual until the next time we need to reboot.
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I've seen this happen after a BIOS update or if a CMOS battery starts failing. Sometimes the motherboard resets to 'Legacy' instead of 'UEFI' (or vice versa), and GRUB just loses its mind because it can't find the partition it expects. It’s worth a quick check in your firmware settings to make sure the boot mode and the drive order haven't shifted on you.
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