Have to agree with the other replies: this could be any number of things. I’d start with the basics by making sure it’s not a hardware issue, then looking at software. Vostro is Dell’s budget business line, and my experiences with Vostro have been lackluster at best.

That’s not to say it’s purely a hardware issue. I’m a hardware guy so I tend to look at hardware first. Any number of software issues could also be causing your issue, including drivers, driver configuration, data corruption on your storage device, a setting or config from your distro or upstream provider, or even some random utility you installed.

Does it crash under other operating systems? Does it crash only after sitting idle for a certain time? Are you able to open another TTY and use the system from a prompt even though your screen is black?

I’ve been doing PC hardware for over 25 years. This is likely related to your laptop display - either the cable connecting the panel to the motherboard, the panel itself, or some motherboard component connected to the display output that has failed.

Try pivoting the display back and forth and see if the glitches change in response. If they do, it’s the cable.

Beyond that, you’d need to do some testing to find the hardware component that has gone bad.

About a year ago, I trialed both Proton Mail and Tuta mail. Proton mail worked out better for my needs, but YMMV. 

One nice thing about switching providers is that it gives you the opportunity to rid yourself of years of built-up cruft and spam.

Do yourself a favor and skip the USB drive - they are ridiculously slow compared to a compact external SSD. I found a cheap m.2 enclosure on Amazon and put an old SSD in it and the speed difference is breathtaking.

My SSD has a bunch of Linux distros grouped into folders along with Windows 10 & 11, every macOS from 10.13 to present, along with Rescuezilla, Hiren’s and a few others I can’t remember at the moment.

Rescuezilla was my #1 go-to during my days of distro hopping. Makes it super easy to try out a distro on bare metal instead of a VM.

“Hevy” is the name of the Clone Trooper from The Clone Wars that the computer is named after. That’s his helmet pictured in Neofetch, along with his famous quote, “You didn’t say ‘Please!’”

All of the computers I manage are named after Clone Troopers.