Hi, whilst you have disabled items in the BIOS, other users may not have, so I have left the references provided by Brave A.I. search engine via mojeek gives:
" NVram Locked Boot Repair
When encountering the "Ubuntu Boot Repair Locked NVRAM Detected" error, it indicates that the NVRAM settings or configurations related to the boot process are locked or inaccessible. This can be due to security features like Secure Boot or firmware locks that prevent unauthorized changes to the boot process, or a BIOS/UEFI password that prevents Boot Repair from making changes. Additionally, corrupted NVRAM data can prevent Boot Repair from accessing or modifying the boot configuration.
To resolve this issue, you may need to disable Secure Boot temporarily to allow Boot Repair to make changes. Additionally, check if there is a BIOS/UEFI password set and remove it temporarily to allow Boot Repair to modify the boot settings. Some systems allow you to reset the NVRAM settings to their defaults, which can help if the NVRAM data is corrupted.
If you need to clear NVRAM to allow the machine to boot from UEFI devices again, you can perform a CMOS reset by shutting down the machine, removing the power cord, and pressing the power on button for about 8 seconds to drain the motherboard capacitors.
Using the efibootmgr command can help manage NVRAM entries. For example, you can list the current boot entries with sudo efibootmgr , modify non-default boot entries with the -b switch, and delete them with the -B switch.
If you are dual-booting and encounter a locked-NVRAM issue, ensure that BIOS-compatibility/CSM/Legacy mode is disabled in your UEFI firmware and use a live-USB that is compatible with UEFI booting mode.
To fix a UEFI machine that doesn't boot Ubuntu through NVRAM bootcatalog, you can use the efibootmgr command to change the boot order and ensure the correct boot entry is set.
If you need further assistance, consider reaching out to a support team for professional help."