I have Windows 8 and Ubuntu 14.10 as dual boot. I have PS2 keyboard. Sometimes randomly (can't reproduce yet) Ubuntu detects multiple different key presses when I press specific buttons. Some buttons work as normal but for 't' it writes 't.', for 'r' it writes 'r+', and some other buttons are also weird.
I checked keypressed with "xinput test" it does detect two different keypress for those keys. I have exactly the same issue on console (Ctrl+Alt+F1), so its not an X issue.
Reboot does not solve the issue, but when I start Windows after reboot, then reboot again and start Ubuntu it works fine again (this sequence solved the issue many times).
How can Windows affect Linux, why does the kernel produces this weird issue? Does anyone have similar issues, could you find a solution? Any ideas further debug the issue?
grub.conf
file afterquiet splash
:atkbd.reset