Synaptics touchpad jumpy under 2.6.2+
From: Patrick Reynolds
Date: Sat May 08 2004 - 22:57:47 EST
The Synaptics touchpad on my Asus M5N laptop is jumpy (sampling ~3 times
per second or less) under Linux 2.6.2, but it works fine under 2.6.1. I
have also tried 2.6.5, and the problem persists. In all cases, the
kernels are straight from kernel.org with no extra patches.
The kernel identifies my touchpad like so:
Synaptics Touchpad, model: 1
new absolute packet format
Touchpad has extended capability bits
-> multifinger detection
-> palm detection
input: SynPS/2 Synaptics TouchPad on isa0060/serio1
The problem shows up in both gpm (1.19.6) and XFree86 (184.108.40.206 with the
Synaptics driver 0.13.0). It even shows up if I 'cat /dev/input/event0',
which produces 3-4 events per second under 2.6.2 and 75-80 events per
second under 2.6.1.
The touchpad problems seem to "spill over" to the keyboard. When I touch
the touchpad at all, the keyboard becomes unresponsive for a second or
two. If I don't use the touchpad, the keyboard is fine.
The keyboard and touchpad are both built in, i8042 devices.
I tried adding 'i8042.nomux' to the kernel command line. It didn't make a
difference for me.
I #define'd DEBUG in i8042.c. Here's the resulting dmesg:
Does anyone have any suggestions? Any idea what changed in 2.6.2 that
disagrees with my touchpad?
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