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I have bough a new hp notebook and installed Ubuntu 18.04 on it.

It has Intel core i5 8th gen processor and 8 gb of ram.

However Ubuntu is somewhat laggy. Alt + Tabbing between terminal, VSCode and chrome are not instant as i would expect them to be.

I think since the computer was shipped with pre-installed windows OS, i need to update my drivers as they are not compatible with Ubuntu? Has anyone experiences similar issues with installing Ubuntu on an hp laptop, and can point me in the direction of a tutorial/article to get my device compatible with Ubuntu?

The delay when pressing alt+tab seems to be a feature in gnome and can be removed by installing the Alt-Tab Switcher Popup Delay Removal gnome extension.

First, install the gnome-tweak-tool if you haven't already done so. From the terminal:

$ sudo apt install gnome-tweak-tool

Next, launch ubuntu software by pressing super (or click show applications, by default it's in the bottom left corner under the favorites) and typing ubuntu software. Once launched, type Alt-Tab Switcher Popup Delay Removal and select install.

Lastly run tweaks (again using super), navigate to the Extensions-section and verify that the newly installed extension is set to on.

Drivers probably aren't the problem. When you install Ubuntu, it installs the correct drivers for your system automatically. Having Ubuntu Dual-booted with Windows wouldn't affect drivers or driver compatibility. You could try changing the Ubuntu window manager to reduce the lag when switching between windows. I would recommend wiping the hard drive of any computer that came with Windows pre-installed before installing a GNU/Linux distribution to free up space and for other various reasons. If you want to keep Microsoft Windows on the computer, then go ahead, but you will have less space with two different operating systems on one hard drive.