I have the E521, and have had nothing but issues with the keyboard and mouse, even on the 1.1.4 BIOS update. The solution that I have found to fix the problem is to append the following as a kernel option:
acpi=noirq This disables IRQ redirects, so if you have a lot of devices, you could have IRQ conflicts. However, I've been typing solid without any freezing. -- Mouse pointer freezes in Dell Dimension E521 / nForce 430 https://launchpad.net/bugs/67734 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
