One week ago, I bought this cheap wireless keyboard and mouse combo for my raspi. Back at home, I immediately tested the devices, as I already knew that some people are still facing issues with ignored or randomly repeated key presses. I was very glad to find out that both the keyboard and the mouse seemed to work fine, and I was already thinking that this combo fitted the raspi really well.
As I had to compile some stuff over night, I did not switch off my raspi for a couple of days, but when I finally rebooted, the keyboard was not working correctly anymore. Ignored and repeated key presses occurred so often that it was impossible to log in. I rebooted again, but the issue sustained. As it had worked before, I performed some further reboots, and suddenly the keyboard worked correctly again.
Apparently, this keyboard only works correctly with the Raspberry Pi under Raspbian on every third or fourth reboot. However, once you have it working, it will reliably continue to work until the next reboot. Thus, it does not seem to be a general hardware incompatibility or power supply problem. Rather, I suspect that occasionally something goes wrong during the USB driver initialization.
For the records:
- Raspberry Pi Model B Rev. 2
- "official" RS components power supply unit.
- Linux raspberrypi 3.2.27+ #250 PREEMPT Thu Oct 18 19:03:02 BST 2012 armv6l GNU/Linux
- Wireless keyboard/mouse combo: Rapoo X1800
- No other USB devices connected