I dug around a bit, and found that the touchscreen can also be fixed by reloading the ic2_hid module.
It also works to reinitialize just the hid driver for the touchscreen (rather than reloading the entire module) by running: echo 0018:06CB:77B2.000C > /sys/bus/hid/drivers/hid-multitouch/unbind echo 0018:06CB:77B2.000C > /sys/bus/hid/drivers/hid-multitouch/bind Disabling and re-enabling the device with xinput does *not* work. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xinput in Ubuntu. https://bugs.launchpad.net/bugs/1796580 Title: Touchscreen breaks after suspend on Acer Aspire Switch 11 Status in xinput package in Ubuntu: New Bug description: I'm not entirely sure this bug belongs in package xinput, but I'm following the lead of https://bugs.launchpad.net/ubuntu/+source/xinput/+bug/1275416, which describes the same symptoms (but on other hardware, so likely a different underlying problem). On this notebook, the touchscreen works well out of the box. But as soon as I suspend (by pressing the power button or closing the lid) and resume again, the touch screen no longer works. Kernel and Xorg logs show no indication of any problem, xinput still lists the touchscreen, but it just no longer works. The touchscreen can be made to work again by reloading the hid_multitouch module (that works by unloading and reloading after a resume, or by unloading the module before suspend and reloading it after resume). I tried updating the bios from v1.03 to the latest v1.04 (no changelog available), but that did not change the problem. I'm attaching a dmesg.txt in addition to the stuff ubuntu-bug collected. In this dmesg log, I've shown a full boot, a suspend (breaking the touchscreen), a module reload (fixing the touchscreen), then a module unload, suspend and module reload, after which the touchscreen also works (I've added annotations to the log to indicate what happens when). The log also shows some USB-related errors after suspend, but that seems to be about the bluetooth adapter (looking at the usb ids), so I think these are unrelated. The touchscreen in question seems to be connected through I2c, according to dmesg: [ 4.561527] input: SYNA7508:00 06CB:77B2 Pen as /devices/pci0000:00/INT33C3:00/i2c-1/i2c-SYNA7508:00/0018:06CB:77B2.0002/input/input8 [ 4.561741] input: SYNA7508:00 06CB:77B2 as /devices/pci0000:00/INT33C3:00/i2c-1/i2c-SYNA7508:00/0018:06CB:77B2.0002/input/input9 [ 4.561917] hid-multitouch 0018:06CB:77B2.0002: input,hidraw1: I2C HID v1.00 Mouse [SYNA7508:00 06CB:77B2] on i2c-SYNA7508:00 I realize that this is not enough information to diagnose and fix the problem, but I'd gladly receive some suggestions on debug strategies to dig into this issue. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xinput 1.6.2-1build1 ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 Uname: Linux 4.15.0-36-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Sun Oct 7 19:40:05 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu GraphicsCard: Intel Corporation Device [8086:0a1e] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:0930] InstallationDate: Installed on 2018-10-06 (0 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: Acer Aspire SW5-171P ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=4893a2e6-84af-4d45-8e31-773e622c36c6 ro quiet splash vt.handoff=1 SourcePackage: xinput UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/7/2014 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.04 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: Longchamp_S dmi.board.vendor: Acer dmi.board.version: V1.04 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.04:bd11/7/2014:svnAcer:pnAspireSW5-171P:pvrV1.04:rvnAcer:rnLongchamp_S:rvrV1.04:cvnAcer:ct10:cvrChassisVersion: dmi.product.family: Haswell-Y System dmi.product.name: Aspire SW5-171P dmi.product.version: V1.04 dmi.sys.vendor: Acer version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xinput/+bug/1796580/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
