# Second screen HDMI freeze

**URL:** <https://deeptalk.lambda.ai/t/second-screen-hdmi-freeze/2797>\
**Category:** Uncategorized\
**Created:** [January 21, 2022, 9:09am UTC](https://deeptalk.lambda.ai/t/second-screen-hdmi-freeze/2797 "2022-01-21T09:09:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vankhoa21991](https://avatars.discourse-cdn.com/v4/letter/v/e68b1a/32.png) [@vankhoa21991](https://deeptalk.lambda.ai/u/vankhoa21991)\
**Post date:** [January 21, 2022, 9:09am UTC](https://deeptalk.lambda.ai/t/second-screen-hdmi-freeze/2797/1 "2022-01-21T09:09:21Z")

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Hello, I face issue with the graphic since the last few days, at first I can not enter the login screen, then I updated all things possible with recovery mode, now I can restart normally. However, the second screen with HDMI is frozen, it does not show anything but my mouse moving.

I doubt this issue is with the package libnvidia-compute-470 470.86-0ubuntu0.20.04.2. How can I downgrade it to 0.20.04.1?

Thanks

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**Author:** ![markd](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@markd](https://deeptalk.lambda.ai/u/markd)\
**Post date:** [January 29, 2022, 3:59pm UTC](https://deeptalk.lambda.ai/t/second-screen-hdmi-freeze/2797/2 "2022-01-29T15:59:29Z")

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That is not using the Lambda Stack version. That is using the Ubuntu version. I would suggest switch to the Lambda stack.

> **[Lambda Stack: an AI software stack that's always up-to-date](https://lambdalabs.com/lambda-stack-deep-learning-software)**
>
> Lambda Stack provides a one line installation and managed upgrade path for: PyTorch, TensorFlow, CUDA, cuDNN, and NVIDIA Drivers. It's compatible with Ubuntu 20.04 LTS, 18.04 LTS, and 16.04 LTS. No more futzing with your Linux AI software, Lambda...

LAMBDA\_REPO=$(mktemp) &&   
wget -O${LAMBDA\_REPO} [https://lambdalabs.com/static/misc/lambda-stack-repo.deb](https://lambdalabs.com/static/misc/lambda-stack-repo.deb) &&   
sudo dpkg -i ${LAMBDA\_REPO} && rm -f ${LAMBDA\_REPO} &&   
sudo apt-get update && sudo apt-get install -y lambda-stack-cuda

Then you would want to confirm, check for errors. And if all is alright, then reboot.

Also confirm you do not have the /etc/X11/xorg.conf  
sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.bad

mark