[Bug 21558] Thinkpad R31 requires 'i8042.nomux=1' on kernel commandline

[Paul Sladen]

Public bug reported:
https://launchpad.net/malone/bugs/21558

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: Medium
       Assignee: zul
         Status: In Progress

Description:
The ThinkPad R31 (really an Acer) requires passing 'i8042.nomux=1' on the kernel
commandline to stop erratic pointer movement caused by the buggy embedded
controller/keyboard combp chip.

This movement occurs approximately every 60seconds if the pointer is being used
at the same time as `batt-applet` queries state.  With ACPI in use, this occurs
approximately every 60 seconds.  With ACPI disabled, the erratic movement is
continous, rendering the machine completely unusable with no way to switch to a
virtual-terminal.

This occurs on the TP R30 and other Acer-based machines, as that was where the
solution was pin-pointed from.  See other laptops requiring this parameter:

  http://www.google.co.uk/search?q=i8042.nomux+required

As well as machines from Sharp and HP.