Getting started

How do I fix resolution and brightness control on my Tensorbook?

1. In a terminal, run the command sudo prime-select on-demand. Then, reboot your Tensorbook.

2. As the Tensorbook is booting, repeatedly press either the Del key or F1 key to enter the BIOS.

3. In the BIOS, choose Chipset > GPU MODE > NVIDIA® Optimus™.

4. Choose Save & Exit > Save Changes and Reset.

How do I reinstall Lambda Stack in Ubuntu on my Tensorbook?

To reinstall Lambda Stack in Ubuntu on a Tensorbook, run the following commands in a terminal:

1. sudo rm -f /etc/apt/sources.list.d/{graphics,nvidia,cuda}* && \
   dpkg -l | \
   awk '/cuda|lib(accinj64|cu(blas|dart|dnn|fft|inj|pti|rand|solver|sparse)|magma|nccl|npp|nv[^p])|nv(idia|ml)|tensor(flow|board)|torch/ { print $2 }' | \
   sudo xargs -or apt -y remove --purge
   sudo apt -y update && sudo apt -y install lambda-stack-cuda lambda-tensorbook

   These commands, together:

   1. Remove existing apt sources that might conflict with the Lambda Stack apt source.

   2. Uninstall NVIDIA software and deep learning libraries that might conflict with Lambda Stack packages.

   3. Reinstall Lambda Stack.

2. grep LINUX /etc/default/grub

   If the kernel boot options are already set correctly, this command will output the following:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
   GRUB_CMDLINE_LINUX="button.lid_init_state=open i915.enable_fbc=0"
   #GRUB_DISABLE_LINUX_UUID=true

GRUB_CMDLINE_LINUX= might contain custom kernel boot options in addition to button.lid_init_state=open and i915.enable_fbc=0.

If the kernel boot options are not already set correctly, run the following command:

sudo sed -iE '/^GRUB_CMDLINE_LINUX=/ s/"$/button.lid_init_state=open i915.enable_fbc=0"/' /etc/default/grub && \
sudo update-initramfs -u -k all && \
sudo update-grub

This command adds kernel boot options needed for Ubuntu to run properly on the Tensorbook.

Be sure to note any custom kernel boot options before running this command. Running this command will remove all custom kernel boot options.

Lambda Stack is now reinstalled in Ubuntu.

Where can I download recovery images for my Tensorbook?

Tensorbook recovery images can be downloaded from our recovery images FAQ.