This issue dates back to March 2012 and is concerned with HP(Hewlett Packard).
After using my DM1 for couple of months , I noticed a bizzare and weird problem.
The laptop's keyboard and touchpad stopped working after usage of 10-15 mins , and it happened every time.
The only way to revive it back to working was to send the laptop into sleep and wake it up again , using power key.
External devices were working fine everytime.
I personally tried every posible troubleshooting measures in my scope.Right from fresh installation , Static Discharge , keyboard removal ,etc ,etc.
It still persisted.
Called in the HP customer care, they asked me to follow a couple of troubleshooting steps.
Well , In the end the lady got pi$$3d by the issue and sent in for a Technician from a THird party agency to my home , as it was under On-Site warranty.
Technician arrived within a duration of 4days.
He asked me for couple of things.
1.Updating the Driver.
2.Reinstallation of WIndows.
I didn't had broadband at that time so he told me that he will come back on Monday with fresh Drivers.
He came back on Monday with fresh drivers, installed them , updated the BIOS.
He monitored the laptop for 15-20 minutes , actaully saw a movie (TRON).
He said it will work flawlessly now , so I don't have to worry.
Well , everything was good untill he left.The problem started back again.
This time with fresh windows Install , and fresh drivers.!!!
I called him , and he asked me to record a video of the problem.
So I did the same , and handed it over to him the next day when he came.
After ruling out all the possibility he sent for a Replacement of Motherboard.!!!! 0.o .
The next week another guy came in , with a fresh new motherboard (he was from Nehru palace).
He took a moment and installed it. Monitored it for next couple of minutes and gave me a report sheet and said its fixed now.!!
Well this time it was fixed.!!! Its working fine till date.!!
I didn't had to face any hassle or any problems , other than the fact that these guys took so much of time to identify the problem , but no-one told me about the root of problem.
(They only gave the answer "Sir, it was a faulty motherboard.")