# How to re-install Ubuntu 18.04 on a TensorBook

Unfortunately, due to BIOS limitations, you can’t just simply install vanilla Ubuntu 18.04. The TensorBooks need a modified set of linux kernel parameters in order to be able to use their GPUs and display. We’re working with the BIOS authors to modify the BIOS to not require this.

In the mean time, you can re-install Ubuntu 18.04 + Lambda Stack by following these steps:

1. Install Ubuntu 18.04

2. Log in, open a terminal and type
   
   ```bash
   sudo nano /etc/default/grub
   ```

Then modify the `/etc/default/grub` file to so that the `GRUB_CMDLINE_LINUX_DEFAULT` looks like this:
   
   `GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_os_name=Linux acpi_osi= acpi_backlight=vendor"`
   
   Save the file with `[Ctrl]-[O]` then `[Enter]`.

3. Type `sudo update-grub` in the terminal.

4. Install Lambda Stack: [Lambda Stack: an AI software stack that's always up-to-date](/content/lambda-stack-deep-learning-software/index.html)

5. Reboot the machine with `sudo reboot`

* * *

You should now have a system with Ubuntu 18.04 + Lambda Stack installed.