Unsure how to boot into Linux after installation finished

System Details

  • Device: Samsung Chromebook Go (Sasuke)
  • OS: Lubuntu 26.04 LTS
  • Firmware Type: RW_LEGACY
  • Firmware Version: Can’t recall
  • Internal storage type: eMMC (I think)

Summary of the Issue

I went through the whole procedure for dual booting Linux, got to the Lubuntu installer as well and finished that. When it said to reboot, instead of bringing me back to Lubuntu, it went to ChromeOS.

So my main problem is either I messed up something during the Lubuntu installation, or I did everything correctly, I just don’t know how to boot the Linux I downloaded on the internal storage. Because right now I can only get to “Try/Install Linux“, and only with the USB device connected.

When I got to the partitioning in the Linux Installer, I believe I chose something along the lines of resize, and the only option it gave me to place Linux in was a ~20 GB partition which I think was the free space.

I would greatly appreciate some help with troubleshooting. Thanks.

After booting, when you arrive on the Developer Mode boot screen that says “OS is unverified" press Ctrl+L to boot into RW_LEGACY.