This issue did not start happening after an upgrade. Ubuntu 15.10 is the only version ever install on this machine.
I booted into kernel 4.2.0.16-generic to see if a prior kernel acts differently. NO CHANGE. The bug exists in the same manner. I followed the link you provided and I now have booted into the latest mainline kernel (4.4.0-040400rc7-generic) and the problem is unchanged. The touchpad is not showing up under `xinput -list` and the message remains the same in `dmesg | grep pnp` `[ 0.867383] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp` See new screenshot In addition, the airplane mode and screen brightness buttons still do not work and airplane mode LED stays on. Should this be reported as a seperate bug? As you requested, I have added the tag: `kernel-bug-exists-upstream' and marked bug as `Confirmed` Thank you so much for your assistance and responses ** Attachment added: "Screenshot after upstream mainline kernel" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1530502/+attachment/4544068/+files/Screenshot%20from%202016-01-04%2019-17-48.png -- 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/1530502 Title: ASUS Touchpad does not work. Some hotkeys alos don't work Status in linux package in Ubuntu: Confirmed Bug description: ASUS UX305-CA laptop with a clean install of Ubuntu 15.10 and touchpad will not work at all. It acts like it isn't even there. This is a dual-boot and touchpad works fine on Windows 10. Appears to be an Elantech touchpad according to driver details in windows but nothing in Ubuntu lists the touchpad. xinput -list shows no touchpad at all, just a virtual core XTEST pointer and my wireless mouse. Notice this message under dmesg | grep pnp: [ 0.839653] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp Also, the airplane mode key, which is F2, does not work and the LED will not shut off as if it is permanently in airplane mode but it is not. Screen brightness keys also don't work but I can work around that. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-22-generic 4.2.0-22.27 ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6 Uname: Linux 4.2.0-22-generic x86_64 ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: greg 1580 F.... pulseaudio CurrentDesktop: Unity Date: Fri Jan 1 20:56:47 2016 HibernationDevice: RESUME=UUID=0543c424-2351-475e-b7b9-e4b67db13bf0 InstallationDate: Installed on 2015-12-23 (9 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 8087:0a2a Intel Corp. Bus 001 Device 003: ID 064e:9700 Suyin Corp. Asus Integrated Webcam Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. UX305CA ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-22-generic.efi.signed root=UUID=337207b1-b19f-47d0-82d0-7ec2f3b6f7ab ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-22-generic N/A linux-backports-modules-4.2.0-22-generic N/A linux-firmware 1.149 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/11/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX305CA.201 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX305CA 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.:bvrUX305CA.201:bd09/11/2015:svnASUSTeKCOMPUTERINC.:pnUX305CA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX305CA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX305CA 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/1530502/+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