RW_LEGACY failing on telticn50 (v144) - worked 3 days ago

System Details

  • Device: [telticn50 Jasper Lake]
  • OS: [ChromeOS v144 LTS]
  • Firmware Type: [RW_LEGACY]
  • Firmware Version: [2026-04-30]
  • Internal storage type: [eMMC] (if applicable)

Summary of the Issue

I had RW_LEGACY working perfectly for 3 days, but today the alternative bootloader disappeared. When I try to re-install it using the script, it doesn’t work. My script menu shows “Fw WP: Enabled” in red, even though I haven’t changed any hardware settings since it was working before.

Steps to Reproduce

  1. Open Terminal/Crosh.

  2. Run MrChromebox script.

  3. Attempt to select option 1 (RW_LEGACY).

  4. Attempt to install RW_LEGACY. > Result: The script says “RW_LEGACY failed to flash.” and I see “Fw WP: Enabled” in red at the top of the menu.

had RW_LEGACY working fine 3 days ago, but now the option is gone from the boot menu. When I try to re-install it using the script, it fails. My Hardware WP is currently Enabled.

there is no correlation or relationship of any kind between the WP status and RW_LEGACY, at all.
The firmware WP status being enabled is expected if you haven’t disabled it.

if the script fails to flash RW_LEGACY, it provides a full log as to the issue at /tmp/flashrom.log pastebin that file and link here.

I couldn’t get the log to copy, but here is a photo of the terminal output. It says: Invalid region specified: "RW_LEGACY“

what do you mean you can’t get the whole log to copy? copy the file to USB and open on another device (or on your CB once logged in).

obviously the RW_LEGACY region exists, and need the whole log to try and figure out why it’s giving that error

I’ve tried cat /tmp/flashrom.log and the cp commands multiple times, but I keep getting ‘No such file or directory.’ > It seems the script is exiting before the log is even written. I am on telticn50 running ChromeOS v144. Since it says Invalid region specified: "RW_LEGACY", is it possible that v144 changed the FMAP? Is there a command I can run to show you my current partition layout instead?

no, it’s not possible that the fmap changed - that’s in the RO firmware.

it’s possible that the script is clearing the tmp due on exit, deleting the log. I’ll check that and push a fix if so

The error is in the picture just in case

there’s lots of info before that which is relevant

Just let me know when the fix is pushed and I’ll run it again.

upon inspection, I don’t see anything that would cause /tmp/flashrom.log to be moved/cleared/deleted when exiting the script