Linux Mint 18.3 ( Sylvia) will receive support until April 2021 this is because Canonical (people behind Ubuntu) will no longer be providing support for the Ubuntu 16.04 release on which Linux Mint 18.3 is based.
You can find information on kernel releases here. 5.4.92 will apparently receive support until the end of 2025. Prior to 5.10, we have the 5.4.92 LTS release, which is why you'll see most distributions are still using that, since 5.10 has yet to be adopted, AFAIK. The current LTS release is 5.10, which Linus and gang apparently wish to maintain until 2026. You could also consider whether a kernel version is LTS (long-term support) or not. Whereas the current 4.18 revision for Ubuntu is 4.18.0 -25. If you had, for example, versions 4.15.0-134 and 4.18.0-13 of the Linux kernel, I'd probably use the 4.15 one, because it's more up-to-date with its revisions this means it's being patched with updates such as for security. You might be using an older kernel version, but that doesn't inherently make it more insecure. I know I should just get rid of this old dinosaur (I've been using since 2008), but it's become an old friend and my little girl uses it too. I wouldn't bother upgrading at all because it's running fine with 18.3 but I just don't feel comfortable with something this old and insecure. If anyone can recommend a version of Linux that will be much newer with the latest kernel and still run fast and efficient. I'd like to be able to run the latest kernel and will allow me to rum a variety of software. It runs well for me now but without updates it's obviously not very secure. I am currently running 18.3 on it with a lighter weight desktop (Cinemmon just will not run on it.) It obviously no longer receives any updates and I'd just like something a little more up to date. It's an old Toshiba Equiuum with an AMD X2 dual core processor and 4gb of memory. That's a pretty solid compromise, we think - and with AMD aiming for the initial batch of hybrid CrossFire-capable cards to be priced around $50, it looks like we'll be seeing these setups a lot when AMD starts shipping these early next year.I just thought I'd check with the forum to see if anyone had a recommendation for a version of Mint which will work well on an old laptop. However, there can still be benefits to using chips of drastically different horsepower: the integrated chips can power down the heavy hitter to save power when not needed, and totally switch over when required. That's pretty respectable, although the system is limited to speedups of the slowest chip times two, so bigger gains are probably not in the offing. Running games like Call of Duty 4 and Unreal Tournament 3, frame rates jumped from 30-35fps to around 55fps when hybrid mode was enabled.
AMD recently demoed the tech to PC Perspective, showing off a 2.2GHz Phenom machine with both unreleased RS780 integrated graphics and a RV620-based card labeled HD Radeon 3450. We've already seen laptops like Sony's Vaio SZ include integrated graphics alongside much more powerful (and power-hungry) dedicated chips, but AMD's looking to make such setups all the more commonplace with new chips capable of hybrid CrossFire.