ChromeOS boot fails, partition A and B #464
Description
Describe the bug
On an Octopus/Casta Chromebook, the shimboot bootloader loads and Debian boots successfully. However, any ChromeOS-related boot path/mode in shimboot (spoofed or unspoofed verified/dev mode / “boot ChromeOS”) does not work. Debian is fine; only returning to/booting ChromeOS via shimboot fails.
To Reproduce
Steps to reproduce the behavior:
- Flash a shimboot image targeting Octopus (Debian) to USB.
- Boot the Chromebook from the USB and reach the shimboot bootloader menu.
- Boot Debian (works).
- From shimboot, attempt either:
- ChromeOS boot option, or
- Spoofed verified/dev mode option, or
- Unspoofed/normal ChromeOS option (if present).
- ChromeOS does not boot / does not behave as expected (only Debian works).
Expected behavior
ChromeOS should boot successfully from the shimboot menu (either via spoofed verified/dev mode or unspoofed path), or at minimum the ChromeOS option should consistently hand off back to ChromeOS instead of failing.
Screenshots / Photos
N/A (no useful error output captured yet). If needed I can provide a photo of the shimboot menu and what happens immediately after selecting the ChromeOS option.
Target Chrome OS Device (please complete the following information):
- Board Name: octopus
- Device Name: casta
- Shimboot version: (fill in exact version/build used, e.g. v1.0.1) (prebuilt image)
Build Device (please complete the following information):
- OS: N/A (prebuilt image)
- Neofetch out: N/A (prebuilt image)
Additional context
- The device is a Samsung Chromebook (Octopus/Casta).
- Shimboot bootloader appears normally.
- Debian boots and runs normally.
- Only the ChromeOS-related options (spoofed/unspoofed verified/dev mode / boot ChromeOS) do not work.
- Please advise what logs to capture (e.g., serial console, shimboot debug flags, or any on-screen messages) to help diagnose why the ChromeOS handoff fails while Debian works.