Yes, nothing on 3.18 Originally I didn't test any of the stable releases for 3.18, it was the standard 3.18, I believe the hash assigned to the tag 'v3.18'. http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-vivid/
It would make sense to me if it was broken somewhere in between v3.18 and v3.18.3 though as lots of stuff that goes into mainline backports to @stable. I went back and tried the stable releases on the mainline PPA. v3.18.1: OK v3.18.2: OK v3.18.3: Reproduces problem Between 3.18 and 3.19-rc1 there's 4 commits to i2c-hid (most likely culprit driver to me) d1c7e29e8d276c669e8790bb8be9f505ddc48888 HID: i2c-hid: prevent buffer overflow in early IRQ 721564a950fdbc07adf9c1e114b73feb97446ec2 i2c-hid / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM 6296f4a8eb86f9abcc370fb7a1a116b8441c17fd HID: i2c-hid: fix race condition reading reports 08bb7beae7fe102939fe5931222fc09e10d27cda HID: i2c-hid: print the correct data in dbg msg Between 3.18.2 and 3.18.3 these other two stand out to me - same as they were between 3.18 and 3.19-rc1 HID: i2c-hid: prevent buffer overflow in early IRQ HID: i2c-hid: fix race condition reading reports -- 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/1416601 Title: touchpad does not respond to tap-to-clicks in I2C mode in Ubuntu 15.04 on 2015 XPS 13 (9343) Status in Dell Sputnik: Confirmed Status in linux package in Ubuntu: Confirmed Status in xserver-xorg-input-synaptics package in Ubuntu: Confirmed Status in xserver-xorg-input-synaptics package in Fedora: Unknown Bug description: Tap-to-click does not work unless I tap several times really fast (which is really hard to do), which also causes the cursor to move. This is a poor user experience. Relatedly, sometimes when using two-finger scrolling, the touchpad will get stuck such that I can let go and the cursor won't move. I can continue using two fingers to try scrolling, which works, but I can't get the cursor to move. If I tap the cursor several times really fast, I can eventually get the cursor unstuck so it moves again. I suspect that this is related to the tap-to-click issue. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.18.0-12-generic 3.18.0-12.13 ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4 Uname: Linux 3.18.0-12-generic x86_64 ApportVersion: 2.15.1-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jared 3714 F.... pulseaudio CurrentDesktop: Unity Date: Fri Jan 30 20:12:17 2015 HibernationDevice: RESUME=UUID=af18bf4f-1453-4c8c-8b8e-abdc5d4e0674 InstallationDate: Installed on 2014-11-03 (89 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 004: ID 0c45:670c Microdia Bus 001 Device 003: ID 04f3:2051 Elan Microelectronics Corp. Bus 001 Device 002: ID 8087:0a2a Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 13 9343 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.18.0-12-generic root=/dev/mapper/ubuntu--vg-root ro video.use_native_backlight=1 video.use_native_backlight=1 RelatedPackageVersions: linux-restricted-modules-3.18.0-12-generic N/A linux-backports-modules-3.18.0-12-generic N/A linux-firmware 1.141 SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-01-08 (23 days ago) dmi.bios.date: 11/04/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A00 dmi.board.name: 0144PA dmi.board.vendor: Dell Inc. dmi.board.version: X04 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA00:bd11/04/2014:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0144PA:rvrX04:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9343 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1416601/+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