Comment 14 for bug 433801

Revision history for this message
Rod Davison (roddavison) wrote : Re: [Bug 433801] Re: touchpad overwhelms i8042 with int 12

I just grabbed the latest "proposed" updates and the problem is resolved.

Fixed!

Rod

On Tue, Nov 10, 2009 at 8:13 AM, Alberto Milone <
<email address hidden>> wrote:

> @Rod
> Can you test the package in -proposed, please?
>
> --
> touchpad overwhelms i8042 with int 12
> https://bugs.launchpad.net/bugs/433801
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: Fix Released
> Status in “linux” source package in Karmic: Fix Committed
>
> Bug description:
> This bug usually manifests itself as a "sticky keyboard", but the keyboard
> is fine.
>
> 1) if I disable the "Internal Pointer Device" in the bios of my laptop, the
> bug goes away completely.
> 2) by doing "cat /proc/interrupts | grep i8042" I can watch the interrupt
> count on int 12 climbing. Even a very light touch on the trackpad (too light
> to even cause the cursor to move), will cause about 600 interrupts. A 1/2 or
> 1/4 second touch will generate ~600 interrupts and take about 2 to 3 seconds
> to process. Any cursor movement using the trackpad prevents any typing for
> at least 2 seconds.
> 3) I can reproduce the problem 100% by touching the trackpad while typing.
> Any typing is delayed or lost while the touchpad is being touched.
> 4) The trackpad and the keyboard both share the i8042, so it seems pretty
> clear that problem is around here somewhere.
>
> PS. My laptop is a Toshiba Portege M300. I'm running jaunty, but I've had
> the problem in feist and hardy too.
> > lsb_release -rd
> Description: Ubuntu 9.04
> Release: 9.04
>
> For those of us afflicted by this bug it makes the system pretty difficult
> to use.
>
> http://ubuntuforums.org/showthread.php?t=772773
>