Hi Chris, the update did not change any symptoms for me.
Booting the kernel without the option 'psmouse.proto=bare' results in the trackpad not working just as before. The only response it will produce when you touch the trackpad is (on rare occassions) it might instantly jump to a random part of the screen, it might disappear, it might result in random keyboard input. Without being touched, every 2 seconds or so, the cursor will drift 50 or so pixels to the left of the screen. I used to fix these by running 'sudo modprobe -r psmouse' and using an external mouse. Booting the kernel with the option 'psmouse.proto=bare' makes all these symptoms go away and basic functionality of the trackpad work. Here's the output you requested: lansdell@juneau:~$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date [sudo] password for lansdell: X550LA.509 06/26/2014 In the process of flashing the BIOS to the latest (509) I did learn one thing: the model of my laptop (ASUS X550LA-DH51) differs from what was advertised by amazon when I purchased it (ASUS D550MA-DS01). This is strange, and was a surprise I only learnt from the trouble I had flashing the BIOS with the latter's BIOS files instead of the former's. Mainly its relevance here is that the title of my bug report lists the wrong model. Let me know how else I can help. Regards, Ben ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1391023 Title: the trackpad is not recognized on my ASUS D550MA-DS01 Status in “linux” package in Ubuntu: Confirmed Bug description: I'm experiencing the same issue described by users here -- the trackpad is not recognized on my ASUS D550MA-DS01. xinputs --list shows no trackpad, and running synclient returns 'Couldn't find synaptics properties. No synaptics driver loaded?'. I resort to using an external USB mouse, and run 'sudo modprobe -r psmouse' after booting to prevent random/unpredictable input occurring when I brush against/click the trackpad. I've tried with a number of linux kernels, Ubuntu releases, and other distributions. The fix suggested by Hans (booting the kernel with psmouse.proto=bare) was successful. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-32-generic 3.13.0-32.57 ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4 Uname: Linux 3.13.0-32-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lansdell 2153 F.... pulseaudio /dev/snd/controlC1: lansdell 2153 F.... pulseaudio CurrentDesktop: Unity Date: Sun Nov 9 18:05:14 2014 HibernationDevice: RESUME=UUID=76ad838b-370f-4814-968c-1d39350caebb InstallationDate: Installed on 2014-05-13 (180 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: ASUSTeK COMPUTER INC. X550LA ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic.efi.signed root=UUID=601d4a6e-da5a-4f6f-95c1-3412f4278552 ro quiet splash psmouse.proto=bare vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-32-generic N/A linux-backports-modules-3.13.0-32-generic N/A linux-firmware 1.127.7 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/11/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: X550LA.502 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: X550LA dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: ATN12345678901234567 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX550LA.502:bd02/11/2014:svnASUSTeKCOMPUTERINC.:pnX550LA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX550LA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: X550LA dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391023/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp