Mathias: After reproducing the error while running my logging/parser, I've been able to identify that the pointer freeze issue is happening in the code you linked. Lines 188-192 are an if condition invalidating the input whenever the final byte is set to 255. In my logging, I'm seeing that that byte is typically 16, 32, 64, and as the comments in the code indicate, seems to be related to how much of my finger I allow to contact the touchpad. However, that byte occasionally (and spuriously) gets set to 255; once set, it stays set at 255 until the touch is removed and re-applied.
My current thinking is that removing the if condition would be sufficient to prevent this issue, but I worry about side-effects when the final byte is set to 255 for valid reasons. Any ideas on the best way to proceed? -- 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/1372609 Title: Touchpad detected as mouse on Asus ux303ln laptop Status in linux package in Ubuntu: Fix Released Status in linux package in Arch Linux: New Bug description: Hi! I'm following the bug reporting documentation here: https://wiki.ubuntu.com/DebuggingTouchpadDetection#In_case_Touchpad_features_like_scrolling.2C_tapping.2C_etc._do_not_work_at_all. The touchpad on my new Asus ux303ln laptop is detected as a mouse, so I can't access touchpad features such as two-finger scrolling. The laptop was very recently released and I couldn't find any outstanding firmware updates for it through Asus's Windows-based tools. % lsb_release -rd Description: Ubuntu 14.04.1 LTS Release: 14.04 Per the instructions on the wiki, I'm attaching output from /proc/bus/input/devices,` xinput --list`, and /var/log/Xorg.0.log. This machine also has a touchscreen, which I'm fairly certain is the "maXtouch digitizer" visible in the logs. I haven't yet restarted in Windows to see if it says anything useful about the touchpad, but I can do so if that's helpful. This is a fresh install of 14.04 and I haven't done much customization of it apart from installing some applications and changing the default resolution. The only relevant bit I noticed in /var/log/dmesg is this: [ 3.967547] input: PS/2 Logitech Wheel Mouse as /devices/platform/i8042/serio4/input/input11 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-35-generic 3.13.0-35.62 ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6 Uname: Linux 3.13.0-35-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tim 2234 F.... pulseaudio /dev/snd/controlC1: tim 2234 F.... pulseaudio CurrentDesktop: Unity Date: Mon Sep 22 14:30:33 2014 HibernationDevice: RESUME=UUID=e6052f15-271a-4424-aac2-9b0ee1e490ed InstallationDate: Installed on 2014-09-22 (0 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 03eb:8a32 Atmel Corp. Bus 001 Device 002: ID 064e:9700 Suyin Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. UX303LN ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed root=UUID=4f908b1b-e06f-4dc9-9642-e952d2598e42 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-35-generic N/A linux-backports-modules-3.13.0-35-generic N/A linux-firmware 1.127.6 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/23/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX303LN.203 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX303LN dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX303LN.203:bd06/23/2014:svnASUSTeKCOMPUTERINC.:pnUX303LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX303LN 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/1372609/+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