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Message #35910
[Bug 487347] Re: Samsung NC10 touchpad generates hundreds of interrupts per second
** Description changed:
Binary package hint: xserver-xorg-input-synaptics
Ubuntu 9.10 fresh install (generally base configuration with no external hardware connected)
xserver-xorg-input-synaptics 1.1.2-1ubuntu7
Samsung NC10 11CA BIOS
When performing testing to reduce battery drain on my NC10 netbook, I've
been tracking the CPU wake-ups. I was using gnome-power-statistics to
track the CPU.
When the computer was idle, there would be around 40 wake-ups per
second. While using the trackpad, there would be ~475 interrupts for
the trackpad as well as ~150 additional interrupts per second generally
increased (totalling around ~667/second). I even had one instance (not
recorded unfortunately, where it was in the thousands). I compared this
against other laptops running fresh 9.10 installation as well as
desktops running it. Even using a USB mouse, they only generate tens or
less of interrupts per second, not hundreds.
Since other laptops don't show this problem but the NC10 does, I'm
guessing it's a cofiguration/setup issue.
I was looking at Bug #194489, and it seems to be perhaps related, but
somewhat different. If I'm not using the touchpad, it doesn't generate
spurious interrupts, but when I do use it, it seems to be way too high.
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- https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-
- synaptics/+bug/194489
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Samsung NC10 touchpad generates hundreds of interrupts per second
https://bugs.launchpad.net/bugs/487347
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References