Unknown Error prevents Ubuntu OS install on UEFI full ROM firmware

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1

System Details

  • Device: KARIS (Acer 714 Spin)
  • OS: Ubuntu Desktop 24.04
  • Firmware Type: UEFI Full ROM
  • Firmware Version: MrChromebox-2512 (01/25/2026)
  • Internal storage type: NVMe

Summary of the Issue

After following Instructions to flash UEFI Full ROM firmware on my device, I attempted to install Ubuntu Linux via USB, using default settings and choosing to erase the disk.

However, the installation fails towards the end with an unknown error. When trying to reboot after seeing this, and removing the USB, Initial boot returns with this error:
’Booting from ‘NVMe: WD PC SK740 SDDQNQD-256G-1014’ failed: Not Found
Verify it contains/points to a valid 64-bit UEFI OS.’

Steps to Reproduce

  1. Flash UEFI Full ROM Firmware on device

  2. From the Boot Menu Install Ubuntu Desktop 24.04 on the device via USB

  3. Reboot Device, and remove installation hardware when prompted

Expected Behavior

After following instruction on how to flash UEFI Full ROM Firmware, & installing Ubuntu OS from USB device, the OS successfully install and reboot without error.

2

nobody can help with an unknown error. The installer generates a log that tells you the issue. You can always just retry as well.

3

Thank you for the quick reply!

Repeated attempts to install the OS result in the same ‘Unknown Error’ message and issue, but I was able to take a look at the logs this time.

The logs have a couple of instances of the following lines towards the end of installation, when generating the device storage trees:

’File "/snap/ubuntu-desktop-bootstrap/502/lib/python3.10/site-packages/curtin/block/__init__.py", line 1194, in quick_zero
ValueError: /dev/O4N7HP4MASDR48JD/thinpool: not an existing file or block device’

Looking earlier in the logs, this file path is supposed to belong to an lvm logical volume, and my install is failing to find this path to wipe. Not sure how to fix this particular issue, any ideas?