Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.18 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.18-rc7 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1784172 Title: Touchscreen does not work anymore on dell venue 11 pro 7139 on kernels 4.13 and above Status in linux package in Ubuntu: Incomplete Bug description: p@p-Venue-11-Pro-7139:~/$ $ cat ./dmesg_4.12.14.txt | grep i2c [ 1.953029] i2c /dev entries driver [ 2.230390] i2c_hid i2c-SMO91D0:00: i2c-SMO91D0:00 supply vdd not found, using dummy regulator [ 2.338340] i2c_hid i2c-SYNA7500:00: i2c-SYNA7500:00 supply vdd not found, using dummy regulator [ 4.836205] input: SYNA7500:00 06CB:6D6B Pen as /devices/pci0000:00/INT33C3:00/i2c-1/i2c-SYNA7500:00/0018:06CB:6D6B.0002/input/input8 [ 4.836462] input: SYNA7500:00 06CB:6D6B as /devices/pci0000:00/INT33C3:00/i2c-1/i2c-SYNA7500:00/0018:06CB:6D6B.0002/input/input9 [ 4.836824] hid-multitouch 0018:06CB:6D6B.0002: input,hidraw2: I2C HID v1.00 Device [SYNA7500:00 06CB:6D6B] on i2c-SYNA7500:00 [ 4.962323] i2c_hid i2c-SMO91D0:00: failed to retrieve report from device. $ cat ./xinput_4.12.14.txt ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ Synaptics T Pad V 01.31 Touchpad id=10 [slave pointer (2)] ⎜ ↳ SYNA7500:00 06CB:6D6B id=16 [slave pointer (2)] ⎜ ↳ A4tech Bluetooth 3.0 Mouse 630 id=19 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Integrated Webcam id=9 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 id=11 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 id=12 [slave keyboard (3)] ↳ Integrated_Webcam_8M id=13 [slave keyboard (3)] ↳ Intel Virtual Button driver id=14 [slave keyboard (3)] ↳ SYNA7500:00 06CB:6D6B Pen id=15 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=17 [slave keyboard (3)] ↳ Dell WMI hotkeys id=18 [slave keyboard (3)] $ cat ./dmesg_4.13.1.txt | grep i2c [ 1.970899] i2c /dev entries driver [ 2.116106] i2c_hid i2c-SMO91D0:00: i2c-SMO91D0:00 supply vdd not found, using dummy regulator [ 5.060363] i2c_hid i2c-SMO91D0:00: failed to retrieve report from device. cat ./xinput_4.13.1.txt ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ Synaptics T Pad V 01.31 Touchpad id=10 [slave pointer (2)] ⎜ ↳ A4tech Bluetooth 3.0 Mouse 630 id=17 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Integrated Webcam: Integrated W id=9 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 id=11 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 id=12 [slave keyboard (3)] ↳ Integrated_Webcam_8M: Rear Inte id=13 [slave keyboard (3)] ↳ Intel Virtual Button driver id=14 [slave keyboard (3)] ↳ Dell WMI hotkeys id=15 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=16 [slave keyboard (3)] Notice missing SYNA7500:00 06CB:6D6B and SYNA7500:00 06CB:6D6B Pen devices. Booting xubuntu 18.04.1 LTS with the old 4.12 kernel solves the issue by now for me. Please help. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-29-generic 4.15.0-29.31 ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18 Uname: Linux 4.15.0-29-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: p 1098 F.... pulseaudio /dev/snd/controlC0: p 1098 F.... pulseaudio CurrentDesktop: XFCE Date: Sat Jul 28 21:46:47 2018 HibernationDevice: RESUME=UUID=7d434cf5-194a-41e4-a4aa-8a1d5b319d34 InstallationDate: Installed on 2018-07-15 (13 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: Dell Inc. Venue 11 Pro 7139 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-29-generic root=UUID=4d1d35d5-9e9e-4777-8d0c-be7e9542cfef ro quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-29-generic N/A linux-backports-modules-4.15.0-29-generic N/A linux-firmware 1.173.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/14/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: A26 dmi.board.name: 0RFDKW dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA26:bd06/14/2018:svnDellInc.:pnVenue11Pro7139:pvr00:rvnDellInc.:rn0RFDKW:rvrA00:cvnDellInc.:ct8:cvr: dmi.product.name: Venue 11 Pro 7139 dmi.product.version: 00 dmi.sys.vendor: Dell Inc. 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