touchpad detected as ImPS/2 even though multi-touch works

[Adam Spiers]

Binary package hint: xserver-xorg-input-synaptics

[This bug doesn't quite fit any of the cases described at https://wiki.ubuntu.com/DebuggingTouchpadDetection - nevertheless I'll provide all the information that page suggests to gather.]

On my Samsung N150+ netbook running fully patched Ubuntu 10.04, the touchpad is being detected as an ImPS/2 mouse. All normal functions work correctly: pointer movement, left/right click, scroll up/down using the right-hand edge of the pad ... even scroll up/down via two-finger multi-touch works! However there are NO signs in any of the debugging information gathered that a touchpad driver is active, and this correlates with the fact that there is no Touchpad Tab in System>Administration>Mouse in the Main menu.

Therefore the usability impact is that it is impossible to disable the touch-to-tap feature which is highly irritating because it's almost impossible to type for any length of time without accidentally triggering a tap on the touchpad. This can sometimes have really unfortunate consequences, e.g. accidentally initiating a transaction in an online banking application whilst the transaction form details are still incomplete/incorrect.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-input-synaptics 1.2.2-1ubuntu4
ProcVersionSignature: Ubuntu 2.6.32-24.44~ppa1~loms~lucid-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
Architecture: i386
Date: Mon Oct 11 01:07:23 2010
DkmsStatus:
 easy_slow_down_manager, 0.13.2, 2.6.32-24-generic, i686: installed
 easy_slow_down_manager, 0.13.2, 2.6.32-25-generic, i686: installed
 samsung_backlight, 0.13.2, 2.6.32-24-generic, i686: installed
 samsung_backlight, 0.13.2, 2.6.32-25-generic, i686: installed
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
MachineType: SAMSUNG ELECTRONICS CO., LTD. N150P/N210P/N220P
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=b60874ed-69cc-4266-ad33-458f8115e5d2 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/zsh
SourcePackage: xserver-xorg-input-synaptics
dmi.bios.date: 04/30/2010
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 01KY.M008.20100430.RHU
dmi.board.asset.tag: SAMSUNG
dmi.board.name: N150P/N210P/N220P
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr01KY.M008.20100430.RHU:bd04/30/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN150P/N210P/N220P:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN150P/N210P/N220P:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
dmi.product.name: N150P/N210P/N220P
dmi.product.version: Not Applicable
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: lucid
 architecture: i686
 kernel: 2.6.32-24-generic

[Adam Spiers (adam.spiers)]

Touchpad detection now works correctly since upgrading to 10.10 and was working perfectly with one of the earlier 10.10 kernels. However since upgrading to 2.6.35-22-generic, multi-touch scrolling is very erratic, and will suddenly jump up or down over a large chunk of the document mid-scrolling.

[Gursimran singh (simar)]

Hi Adam Spiers,
Thanks for reporting the bugs. I see that the bug has changed overtime and is now very different from what you intended to file at beginning. To avoid confusion, I request you to file another bug that mentions your new issues right from start against the kernel instead. Meanwhile I can close this bug report.

[Gursimran singh (simar)]

Please subscribe me there after filing the bug report.

[Launchpad Janitor (janitor)]

[Expired for xserver-xorg-input-synaptics (Ubuntu) because there has been no activity for 60 days.]