I have Acer Aspire 5741 (4GB RAM, Core i5, 500GB HDD, Intel HD Graphics) I use Ubuntu 64bit 12.04, before it i used 11.10. Also i have tested 12.10. I have same problem and it is not about OS version. Ubuntu runs slow with my laptop. I open SYSTEM MONITOR and see that CPU usage is about 10-15%, RAM usage is about 40-60%, but system runs too slow. After startup it runs slow, after opening 8-9 tab in Chrome it begins working bare slow. And at that time i check for system monitor and i see that CPU and RAM usage is normal (10-20% and 40-60%). So, it seems that Ubuntu can't use all resourses of my laptop. Any ideas what to do?