Keyboard will not work welll, even here it repeats letters and won't add spaces unless I hit spacebar twice, it has done this before, won't work on facebook at all, I searched firefox for keyboard errors but didn't understand their way of fixing it.

Are you on a laptop, or a desktop machine with separate keyboard?

I use a desktop machine with separate keyboard. Your symptoms happened to me, too, though pretty long ago. I decided my keyboard had become defective and replaced it, which solved my problem. I think letter-doubling is a known sign of keyboard failure, but I don't know if that applies to laptop machines.

if lop get a plug in keyboard keep receipt and packaging for it, then plug it in and if it works then you need to replace keyboard - get replacement do that then take back the other one for a refund.

if you can get a Virtual Keyboard installed then add it to your startup script / autostart when you login that'd keep you running until you get a emplacement.

work around to get VKB:

I had to use copy paste for whatever letters I didn't have.

I just opened a browser or whatever with words in it, used my mouse of course to get the letters my keyboard wouldn't type and got a VKB installed when I had my KB not working.

i've had Linux for over 10 years, by looking through all the menus I found 2 that said keyboard, 1 asked about repeating characters and it was on slow, so since I was trying to speed uppp my keyboard I set everything on fast. That didn't help, the otherkeyboardmenu I foundwas mostly languages, so i did a search on keyboardsnotworkng a and teysaid I ad a bug and I needed to run proramand it would fix, but as I started it said did not have the bug.////???? This is a preview of hoooww my keybbboard works.

are all of your keys working ? doesn't matter if they repeat,
press each key one at a time to make sure all keys are working,

if all keys are working. if yes try to reset your speed - or get a usb plug in keyboard and see how that works with whatever settings you already have on it for keyboards.

Hi! Welcome to LQ. Lets collect more 'clues' as to what's going on 'behind the scenes'.
When did this start happening? PC model/details? (Kernel/driver vs. gui X 'user' pgms)
Can you Ctrl+Alt+F1 (or +F2-6), to get to a (non-X11 gui) terminal? kbd ok there? grub?
There's pgms xev/showkey/evtest that may provide info/clues. Empathy for the frustration!

If you have set autorepeat delay to fast then when hitting a key you will probably get multiple characters as you seem to indicate above. Setting autorepeat to fast will just cause the characters to be "typed" quickly when you hold down a key.

Hope this helps.

Play Bonny!