[ltp] trackpoint, touchpad, and buttons suddenly dead

[David Griffith]

On Sat, 26 Aug 2017, Christoph Schmees wrote:

> Am 26.08.2017 um 13:38 schrieb David Griffith:
>>
>> While I was using my T420, the touchpad suddenly stopped responding, as
>> did the mouse buttons and trackpoint.  The output of xinput shows no PS/2
>> keyboard/mouse interface available.  The output of lsmod shows that the
>> psmouse module is unused.  I checked the BIOS to see if somehow these got
>> turned off.  I turned them off, rebooted, then rebooted again, and turned
>> them back on again.  I removed the hard drive and inserted a Windows 7
>> hard drive I keep around for when I need to use Windows on this laptop.
>> Still nothing.  All this while, the keyboard has continued to function as
>> expected.
>>
>> What could have caused the ps/2 mouse interface to fail like this?
>
> Southbridge failed due to overheating? Is USB still functioning? How 
> is air flow: little and very hot? Just my shot into the blue ...

Southbridge seems fine as far as heat and ventilation goes.  I blew out 
the gunk three months ago, and there wasn't much.  USB still functions 
fine.  I'm going to replace the motherboard.  It'll be cheap enough and I 
still like the T420's keyboard too much.

-- 
David Griffith
dave at 661.org

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