# Tensorbook Max fan issues and battery usage

## post by vdasari on Nov 5, 2018
I have recently purchased a tensorbook max and it the fan comes on all the time even if no application is running on machine. Did anyone noticed this and is there a solution for this? My batter seems to last less than 3 hours even if I am not doing any deep learning stuff. Thanks for any feedback on this.

## post by leonnowsden on Nov 7, 2018
Can you try htop and then read out the CPU usage. and then kill the process.

## post by sabalaba on Jan 29, 2019
Hey guys, one thing is that you may have accidentally pressed Fn+1. Note that this is _NOT_ function plus eff one but Function plus ONE as in 1. Please tap `Fn + 1` a few times to cycle through the fan settings and set it to a quieter default.

## post by alex on Feb 13, 2019
When I do the trick with Fn+1 it works, but when cycling to the lowest of the three modes, it switches slowly within one minute back to the middle setting (which is too noisy). Is there a way to edit those fan settings? Where can I find the configuration file? Bios?

## post by sabalaba on Feb 14, 2019
[@alex](https://deeptalk.lambda.ai/u/alex) somebody on our support email [support@lambdalabs.com](mailto:support@lambdalabs.com) can try and help out. It sounds like you’re already in a conversation thread with them. For now, running these commands will disable the discrete GPU (Nvidia) for graphics, falling back to the integrated graphics (Intel). That should reduce the temperature, and allow the fan to run quieter.

```bash

sudo rm /usr/share/X11/xorg.conf.d/11-nvidia-prime.conf
sudo systemctl disable gpu-manager.service
sudo reboot
```

## post by alex on Mar 22, 2019
Hi,  I did that, but can’t use a second screen via HDMI or DP then. I tried going back to use my second display with  
`sudo systemctl enable gpu-manager.service`  
but the display doesn’t work despite the 11-nvidia-prime.conf being created. /var/log/gpu-manager.log looks normal, except that it doesn’t find the output for card1 driven by “nvidia-drm”, which should show HDMI and DP. Only card0 driven by “i915” shows output 0: card0-eDP-1. nvidia-smi gives Disp.A Off and processes Xorg, gnome-shell are running on it xrandr also only shows eDP and no HDMI or DP. EDIT (solution): when doing that, there can be problems with gmd3 afterwards. Solution is to install

`sudo apt install ubuntu-unity-desktop`

and switch to lightdm via

`sudo dpkg-reconfigure lightdm`

then everything works fine again

## post by sabalaba on Mar 31, 2019
Thanks for clarifying that!

## post by drogon on Jul 12, 2019
Is there a way to check what setting the fan is currently on? It gets hot when running heavy and just want to make sure the fan is at full blast.