List of devices doesn't clear

[geohei]

Hi.

Gigabyte GA-Z77X-UD5H / F15

After doing some Windows7/Ubuntu test installs on subject motherboard, I kept on having 2 entries in the list of devices to be booted from.

UEFI: WDC WD1000FYPS-01ZKB1
ubuntu

The HDD "WDC WD1000FYPS-01ZKB1" is physically disconnected from the motherboard.
"Load Optimized Defaults" didn't help.
Using the CMOS_SW (PSU was powered off before) to clear the CMOS settings didn't help.
Even taking out the battery didn't clear the entries (only date & time).

BBIOS (F8) doesn't show the HDD entries.

Strange!

Shouldn't I get rid of the drive entry with the methods I used above?
Is this a bug?

Thanks,

[geohei]

I did some more testing with firmware F14 and F13.

After test installs of Windows7 and Ubuntu 12.10 Desktop 64-bit. I noticed that the Boot Menu (key F12) shows "ubuntu" even after I disconnected all HDDs, removed all USB stciks and all CD/DVDs.

How is that possible . There's nothing connected to the computer which saves data, except the BIOS DRAM. Does this one store (historical) devices which were bootable once?

[geohei]

Strange that nobody knows anything about this ... ?!
I found this: http://info-coach.fr/pc/hardware/AsusP8P67/Asus-UEFI.php

It's from ASUS and 2011, but the BIOS description reflects more or less what I experience with my Gigabyte motherboard.

[geohei]

Found that efibootmgr (Linux) is required to clear that entry which is obviously stored in the NVRAM of UEFI.
Would be good if UEFI interface would allow deleting and/or creating such an entry.