Keyboard repeating characters

What if a key up signal is lost (the root cause of repeating keys), but a subsequent key down signal (of a different key) arrives within the timeout? This wouldn't be an uncommon situation.

HID keyboard reports are not simple single key up/down messages. It is an array of up to 6 keycodes of currently pressed keys. So for your example scenario, when the next report arrives without the previously pressed keycode, the parser knows that the previous key has been released.

[gsh]

Made significant progress on the USB issues today, I think I've got the right solution, just ironing out the bugs, but all these issues should disappear in another couple of weeks...

Gordon...

Just booted up my Pi for the first time and plugged a wireless USB adapter for my MS 2000 mouse and keyboard (50mA). Hardly works at all. Letters repeating it self, some are not working etc. etc.
Do I have to go and by a wired set instead or is there any solution?

Edit: Just found out that it was listed under "Problem Keyboards" http://elinux.org/RPi_VerifiedPeripherals#Problem_USB_Keyboards

Code: Select all

dwc_otg.speed=1

did not work for me. It couldn't even boot correctly.

Yes, I have also found that every time I tried it.

Me too. Doesnt boot. Also not after removing the line.

[...] all these issues should disappear in another couple of weeks...

Honor and Glory will be yours.

Made significant progress on the USB issues today, I think I've got the right solution, just ironing out the bugs, but all these issues should disappear in another couple of weeks...

Gordon...

Another fan here.....

+1

While we wait for the definite solution, why not just accept the pull request from sonofusion82? I've got a wireless Microsoft 5000 set and it only works with ugly dwc_otg.speed=1 workaround.

I also got the repeating characters problem today, after a while of usage. Both with a Logitech iTouch Keyboard, and with a DELL SK-8125.

The problem went away when I disconnected the mouse (HP M-UV96).

I don't know if this helps or not, but I updated my RPi running Arch today and started to experience these problems. I hadn't updated since Dec 17th and everything was fine then, so I'm guessing something changed from then till now which is causing this?

Just a further note on the keystroking issue. I played with raspbmc and XBMC for the last couple of months and never saw any keyboard entry problems. Decided to download the latest raspian and get going on some C coding. Now with the exact same setup as with XBMC the repeat keystroke problem really shows up. Make it look like a software issue rather than the kybd device /PSU solutions I have seen on these boards.

Well a couple of weeks came and went Was this problem ever solved..? Please say yes!

Not altogether. Its not a problem for most keyboards but having just tested the latest raspdian with the latest kernel from github (#403) my Microsoft Sidewinder X4 still bounces keystrokes. But I think the latest USB updates have been aimed at webcams/audio devices rather than keyboards.

[dom]

This is the thread you should be following:
viewtopic.php?f=28&t=39175

(but still a work in progress)

Thanks!