I have the same laptop but the touchpad didn't work at all with a new installation of Ubuntu 9.10 (Karmic Koala). I had to create an xorg.conf file with the configuration for the touchpad. Option "SHMConfig" "true" had to be set to get it working.
I noticed a "Unable to query Synaptics hardware" message in the kernel logs and found this Gentoo bug report that details issues with synaptics devices and the kernel:
I have the same laptop but the touchpad didn't work at all with a new installation of Ubuntu 9.10 (Karmic Koala). I had to create an xorg.conf file with the configuration for the touchpad. Option "SHMConfig" "true" had to be set to get it working.
I noticed a "Unable to query Synaptics hardware" message in the kernel logs and found this Gentoo bug report that details issues with synaptics devices and the kernel:
http:// bugs.gentoo. org/287019