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From
SubjectRe: synaptics mouse jitter in 2.6.0
Date
On Tuesday 23 December 2003 03:37 am, Andres Salomon wrote:

> [...]
>
> This works a lot better than both -mm1 and stock 2.6.0's mouse behavior
> for me; 2.6.0 likes to drop packets inside the interrupt handler and
> make the mouse jump to the edge of the screen, and 2.6.0-mm1 likes to
> move the pointer between the time I take my finger off the touchpad and
> hit the mouse button. This appears to fix both issues; however, I
> still see the following in logs:
>
> Dec 23 03:33:53 spiral kernel: Synaptics driver lost sync at byte 4
> Dec 23 03:33:53 spiral kernel: Synaptics driver lost sync at byte 1
> Dec 23 03:33:53 spiral kernel: Synaptics driver resynced.
> Dec 23 03:33:55 spiral kernel: Synaptics driver lost sync at byte 1
> Dec 23 03:33:55 spiral last message repeated 4 times
> Dec 23 03:33:55 spiral kernel: Synaptics driver resynced.
>

That is a known issue with ACPI and i8042 (you do use ACPI, don't you?)
that we were not able to pinpoint yet. The solution that helps a bit is
to poll battery state/tepmerature less frequently.

Dmitry
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