Over the years going back to the AT I have never had a problem with keyboard connectivity. Just plug them in and they work. This is up until recently.
I was using a Dell wireless but it started to wear out a bit. I ordered an Arteck 2.4G Wireless Keyboard Ultra-Slim. It was not smooth the keystrokes seem to be getting buffered and many characters were missing. I ended up buying a Logitech MK235 set. They behaved in the same way. Put the old Dell back on and it ran perfectly. Then back to the Logitech and some improvement but the mouse is jittery. Has anyone any ideas?
Mobo: Gigabyte B450M GAMING with 16 G RAM
O/S: Manjaro Cinnamon DE

If these (the new ones) are both wireless keyboards it's possible they're encountering interference due to operating on some different band than the Dell. Can you try relocating the wireless transmitter/dongle closer to your operator's position? Would a wired keyboard be out of the question?

Get a USB extension cable, male/female, connect the male end to your computer, put the receiver in the female end, and move it around, preferably nearer to the keyboard. There is a tremendous amount of 2.4GHz radiation now, with wifi, bluetooth, and whatnot. I had one wireless keyboard/mouse combo in which the mouse was unusable, just too jittery and unreliable, no matter where I put the receiver. I got a Logitech and it works fine, but only with the receiver closer to the keyboard and mouse. It's unreliable with the receiver directly into the PC. It's sort of like the old days of TV reception, when you had to get the rabbit ear antenna in just the right spot.

Thanks, guys, I was wondering about this. One thing I did try was moving the dongle to the USB connector at the top of the case. It didn't really do anything. Trying a A-B cable should be easy I must have one somewhere.

P/S 2 keyboard is a possibility. I was looking online but the ones I found was a bit cheap. The other thing I live in the UK but always use a US-Layout because most of my life has been spent in Australia, where we use US-Layout and I can't get used to the silly UK layout, with very little availability I have to import from O/S so I have to be sure what I am doing.

Just a followup. I rummaged through my box and found a USB A-B cable. It worked perfectly as far as I can tell. The mouse is also working more smooth. Thanks for all your help and suggestions.

Glad you got it working. Although I honestly wonder in response to sgosnell's point - what's the point of 'wireless' if we need the transmitter .1" away from the 'wireless' device?

Also to note: just because you don't go wireless doesn't mean you have to go back to the olden days of PS/2 - there are wired USB keyboards/mice as well.

I do agree with you. I now have a wire dangling at the back of my desk. PS/2 seems to put me in my comfort zone. I am aware some gamers say its faster but what I have read there is nothing to support this. I am not a gamer anyway. OK if I go for a wired keyboard and mouse, any suggestions. As I mentioned I need a US-Layout and most likely needs importing. Lots of cheap ones but I would budget for $100 and flexible.

It doesn't have to be .1" from the keyboard, just sometimes away from the computer by a few inches. The best location has to be found by trial and error, moving the receiver around. In a perfect world, any USB port in the PC would be fine, but this world is not perfect. I think it's mostly a matter of interference caused by the multitude of transmitters in use. In the room with my two computers with bluetooth and the wireless keyboard/mouse are two wireless printers, the wifi router/modem, my phone,a Google Home hub, two guitar wireless systems, and often more. They all transmit on the same band, albeit different channels. Not to mention the devices in other rooms in the house and the wifi signals from other houses around mine. There is bound to be at least some interference.

I think the "PS/2 is faster" comes out of the interface supporting NKRO out of the box (https://en.wikipedia.org/wiki/Rollov...n-key_rollover and also see https://www.mmo-champion.com/threads...ng-(NKRO)-list), and acting with (at least in concept) hardware interrupts - it is preferable for troubleshooting and KVM use as a result as well. But modern USB implementions can support 6KRO or other KRO that's near-enough-as-to-not-matter to NKRO to be 'good enough' (for example, the USB keyboard I'm typing this on should be NKRO, but the other USB keyboard on my desk fails the 'test' in the second link).

As far as what keyboards to suggest - on the cheap end the Logitech K120 is surprisingly good for the price, and is basic enough. If you want probably the 'most American thing ever', Unicomp still makes keyboards - https://www.pckeyboard.com/ (I have never bought one of these, this company is 'what happened' to IBM's Model M manufacturing plant, and they're still reportedly made in the USA). As far as something 'nicer' - a lot of newer 'gamer' keyboards tend to be decently built mechanical affairs and many of them support NKRO, as long as you can deal with all the lights/styling. I've seen decent examples from Razer, Mistel, Corsair, and heard good things about Ducky. This isn't to say that 'standard' Microsoft/Logitech multimedia keyboards are a bad choice either - just that I'm not sure I'd be willing to part with $50-75 USD for one when you can get a spiffy mechanical keyboard for around the same price.

When you say 'US layout' vs 'UK layout' what do you specifically mean? The lettering on the keycaps is largely irrelevant (it probably reflects the default map on the controller, but you can remap most of that in software - e.g. to switch between QWERTY, Dvorak, Colemak, etc), but from what I understand the UK will frequently use a somewhat modified keyboard with ISO-style/'bar-shaped' Enter (Wikipedia says they have their own British standard - joy), while the US most commonly uses the ANSI layout.

Here's a comparative image I snagged from Wikipedia:
https://external-content.duckduckgo....png&f=1&nofb=1

The key rollover issue would seem to be pertinent only to gamers who need to press many keys simultaneously. For normal input, two is usually enough, occasionally 3, never 6. I cannot get excited about that.

British keyboards are mapped to different characters on some of the non-letter keys, such as '";:[]\|, etc. It can be a pain if you get the wrong layout, as I've discovered once long ago. It's easy enough to explore if one is so inclined, by changing the keyboard layout in settings.