I have the same laptop, I use Ubuntu Dapper, and I do not have any such problems. I could do some tests for you if you want. Here is my test (with a uppercase 'I'): https://wiki.ubuntu.com/LaptopTestingTeam/AcerAspire1694WLMI -- Acer Aspire 1694WLMi IRQ #10 Problems! https://launchpad.net/bugs/32893