For a new user who just wants a good OS to start with, Pop_OS is a fine choice. A little surprised you had trouble with Mint identifying your WiFi card but, I see others have posted on it. Mint is typically my go-to recommendation for new Linux users.

Drivers is a vocabulary you should almost forgot in Linux ;) Contrary to other OS, Linux will rarely require you to install a driver.

To answer your question, doing a simple online "mint wireless 8275" returned a forum with your exact issue. The reported solution is to "try powering it off, remove the power cord and hold the power button for 30 seconds. Reconnect cord and power up". As weird as it sounds this may work. It worked for me 10 years ago with a keyboard. It's easy and quick to try it. Let us know if that helps or not. Too bad you didn't like Arch because your laptop was fully supported.

Did you use the Debian edition of Mint? Debian doesn't include a lot of proprietary drivers and/or firmware blobs with its standard edition.

I can't say that's the case here, but it's possible that Mint is either using Debian as a base, or at least following the Debian Free Software Guidelines.

There's usually a nonfree firmware deb you can use, post installation. If you can complete the install and connect to the internet via the 7480's Ethernet port, you should be able to get the wifi card working.

Intel and the iwlwifi driver are very well supported and should work out of the box. You might try the Edge ISO, I don't know what kernel is in the regular 21.3 ISO but Edge is supposed to be newer in general. Upgrading to 21.3 is simple once installed.

https://linuxmint-user-guide.readthedocs.io/en/latest/edge.html

There is also an odd solution at https://forums.linuxmint.com/viewtopic.php?t=399427 (applies to a normal PC, but if you're able to remove your laptop battery or turn off the battery in the bios for a tik).

Thanks for the update. Have fun!

You don't need to distro hop to try different DEs.

There's no enough information to understand what Wi-Fi adapter you have and what driver is used. Show us lspci -knn

Hardware related stuff like this typically comes down to the kernel version, or what kernel modules the distro ships. The linux kernel comes with a ton a drivers for different hardware, each of which implement support for hundreds/thousands of pieces of hardware. The wi-fi driver shipped with Mint isn't new enough to include an implementation for your specific wi-fi hardware.

Mint seems to be on an LTS 5.X kernel, while Pop is shipping newer 6.X kernels (makes sense, as they like to keep up with gaming-related improvements).

As an example, I had to jump to a newer version on Manjaro, when the LTS kernel used by default was just one digit behind the version that was new enough to have support for the PS DualSense5 controller.

Hopping to a newer kernel version can be tricky depending on the distro, but it looks like Mint has a tool for this. You can find it in the Update Manager: View --> Linux Kernels. There you should be able to switch to running a 6.X kernel version.

For Mint you could maybe repurpose the Debian instructions (install the firmware-iwlwifi package): https://wiki.debian.org/InstallingDebianOn/Dell/Latitude7490

But I guess it's a weird issue since Intel cards are usually well supported. So are most Dell laptops in general. My usual approach is to type in something like "wiki linux dell 7480" into google. There are very little specific info around which leads me to believe everything usually works out of the box.

In case the thing with the button holding and power cord doesn't work, check your BIOS settings if it's disabled somewhere and then check the logfiles. "dmesg" and the boot output might contain the exact issue.

Where my curiosity lies is this, from my understanding Linux Mint is based on underlying Ubuntu as is Pop_OS, so how come both Pop_OS and Ubuntu recognise the wi-fi card out of the box so to speak but Mint doesn’t.

Different releases of Linux distributions come with different kernel versions (e.g. 4.x vs 5.x vs 6.x). And in the past sometimes for some devices (Like Android smart phones for mtp file transfer, or security keys) additional udev rules had to be added to make the Linux system recognize the device properly. Then there is firmware (closed source binary blobs) as well.

I remember a friend having issues with the WiFi card, with an old LTS version of Ubuntu, whereas a brand new Ubuntu version worked fine with the WiFi card. Glad to hear it all works for you, and welcome on board @ Planet Linux.

(Intel)[https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html) has a list of compatible cards and their drivers which may help, follow the instructions and reboot to run usually.

If it's an adaptor there's odds it's not designed for it, I had issues with a USB mounted adaptor myself.

I know you have been getting a lot of suggestions but have you tried Fedora or any of the rpm based distros?

Basically all Linux distros can trace everything back to three major ones: Debian, Arch and RHEL. (Also slack ware is a thing and there are many non major one). Since you tried Debian and arch families without success, I suggest you give the RHEL family a go. In my experience RHEL based distros have the best hardware compatibility.

Contrary to what some have said here, it’s not unusual to have to download and manually install the wifi driver for Mint. It’s even mentioned as the one extra step in a cartoon comparing the time it takes to install three different distros. I had to do this for two different laptops.

OmanMkII already provided the link for intel, but here it is again:

https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html

@hellequin67 Tried this? https://forums.linuxmint.com/viewtopic.php?t=399427