I'm observing the same problem with Oneiric on a Samsung NC10+ (notice the plus sign, this is not the old NC10) which, as far as I can tell, is just the same computer as the N150 (only named differently in certain countries/markets). Looking around in the Internet, I see that this machine uses an Elantech touchpad, which, so far, seems to be poorly supported under Linux. In particular, the problem seems to be that this particular touchpad uses a protocol that isn't supported by the current Linux driver. The driver, however, still manages to recognize it as an Elantech touchpad, but parses the data packets coming from it using the older protocol, which results in the pointer behaving erratically (two finger scrolling is particularly bad) and eventually stopping to move at all.
This morning I just stumbled into Bug #681904, which apparently fixes the Elantech touchpads for several Samsung models. For these models, however, the symptoms are quite different, apparently due to fact that their touchpads are not being recognized as Elantech at all, which means they are treated by the driver as regular PS/2 mice. In this case, the touchpad works correctly, but none of the special touchpad features are available. I can easily achieve this state here by creating a file called e.g., /etc/modprobe.d/psmouse.conf containing the line options psmouse proto=imps As soon as I do that (and restart the machine or at least unload and reload the psmouse driver), the touchpad starts to work (to a certain extent), but the touchpad tab in the mouse configuration options disappears, similar to what people in Bug #681904 report. My guess is that the touchpad in the N150/NC10+ is actually a version 3 hardware, but is being wrongly recognized by the driver as version 2. Indeed, I see the following lines in my kern.log file: Sep 10 22:56:17 masoftito kernel: [16643.200044] elantech: assuming hardware version 2, firmware version 4.2.22 Sep 10 22:56:17 masoftito kernel: [16643.235574] elantech: Synaptics capabilities query result 0x09, 0x14, 0x0b. Sep 10 22:56:17 masoftito kernel: [16643.334968] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input10 The good news, however, is that the recent driver changes referenced from Bug #681904 actually seem to support the v3 protocol, which probably means that a fix for the N150/NC10+ is just a matter of getting the driver to use the right protocol. I'll add apport-collect info in a few minutes, just in case it helps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805818 Title: Mouse Erratic Movement not able to control. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/805818/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
