Has anyone successfully network booted a Cubi N ADL S

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hollan157b02e3

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I've been using little PCs as DVRs for many years, needing to network boot them with grub2. Never had a problem with any of my previous PCs (a minisforum n40 was the last). I'm getting next to nowhere with the Cubi I just bought. It seem to be downloading grub2's core.efi, but doesn't seem to be able to successfully run it.

Anybody here had need to network boot one of these?
 
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Please confirm setting value in BIOS setup as attachment.
Advanced / Integrated Peripherals
 

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Yes, I have that enabled. And the tftp server logs show the request for core.efi. With an old version of grub2, I even saw a message "welcome to grub", but it gets no further core.efi should then fetch grub.cfg, but it doesn't get that far.
 
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Yes, that did it thanks. The whole network boot procedure completes now. I see nothing on screen when the UI is supposed to appear, but that's not unexpected: there are parameters that I would expect to have to tweak when moving to different hardware.

I ran into one weirdness, as before with the previous BIOS: I needed to disable secure boot. At first the UI for controlling that was greyed out. I fiddled about a bit and then it appeared enabled. A bit odd, but seems fine now.
 
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