Comment 12 for bug 877064

I believe I have the same issue. The problem began just yesterday after I upgraded from 11.04 to 11.10. Logging in through a guest session doesn't resolve the problem. However, the issue does seem to go away if I quit my iBus language tool.

Basically my problem is similar to what people have described. Typing slowly doesn't really help in my case, but sometimes I do notice a significant lag time for the limited keys that I'm able to type. Generally, I never experienced issues with a slow response time in other versions of Ubuntu--things were always lightning fast.

To elaborate a little, in my case I'm only able to type about a fifth of the letters on the keyboard, and I'm unable to use the delete button. After fiddling around a little bit, I noticed that if I press "y" or "n" at the onset, I can type whatever I want and delete it as long as it's lower case. Otherwise, similarly to what someone else posted, I can use the shift button to type letters too, but it's not possible then to fully switch back to lower case.