Installed ubuntu on usb stick works fine on same laptop used for installation but does not boot on other machine it shows a blank screen

Question

Installed ubuntu 20.04 on a usb stick then used that to create a full ubuntu installation on a usb stick with 3 partitions swap, /boot & ex4 with a "/"
Now the usb stick works well on the same laptop used to install ubuntu but on other machines it does not work it shows a blinking cursor on the left corner with a blank screen please help :)

Answer 1

There can be different causes of this problem:

• You installed the bootloader into the internal drive. This can be avoided if you unplug, disconnect or otherwise disable the internal drive during the installation to the external drive.

• There is no hardware driver for the other computer(s). This can happen for example if you install a proprietary graphics driver, that does not work in the other computer(s) and blocks the built-in linux driver that should be used.

See the following links,

• Step-wise instructions for installed system in a USB drive

• How to Create a Full Install of Ubuntu 20.04 to USB Device Step by Step

• If you need not encrypt the drive, there is an easy alternative. You can use a compressed image