After reading the related bug 1853277 for the Thinkbook IML variant, I see that the elan touchpad is not visible on the i2c bus:
$ cat /sys/bus/i2c/devices/*/name Synopsys DesignWare I2C adapter i915 gmbus tc6 DPDDC-A DPDDC-B DPMST SMBus I801 adapter at efa0 i915 gmbus dpa i915 gmbus dpb i915 gmbus dpc i915 gmbus tc1 i915 gmbus tc2 i915 gmbus tc3 i915 gmbus tc4 i915 gmbus tc5 ELAN0634 does NOT show up in the list. -- 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/1861610 Title: 'Elan touchpad' not detected on 'Lenovo ThinkBook 15 IIL' Status in linux package in Ubuntu: Confirmed Status in linux-oem-5.6 package in Ubuntu: Fix Released Status in linux-oem-osp1 package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux-oem-5.6 source package in Bionic: Invalid Status in linux-oem-osp1 source package in Bionic: Fix Committed Status in linux source package in Eoan: Confirmed Status in linux-oem-5.6 source package in Eoan: Invalid Status in linux-oem-osp1 source package in Eoan: Confirmed Status in linux source package in Focal: In Progress Status in linux-oem-5.6 source package in Focal: Fix Committed Status in linux-oem-osp1 source package in Focal: Invalid Bug description: [SRU Justification] [Impact] Touchpad function unavailable on some platforms with new ELAN touchpad HIDs. [Fix] https://lore.kernel.org/linux-input/000201d5a8bd$9fead3f0$dfc07bd0$@emc.com.tw/ required to match these currently unsupported IDs. [Test Case] 1. check if platform is affected, e.g. with ELAN0634: $ sudo acpidump | grep -C3 ELAN 2A060: 49 4E 54 31 70 0A 20 49 44 41 44 A4 84 53 42 46 INT1p.IDAD..SBF 2A070: 53 53 42 46 49 00 5B 82 42 0E 54 50 44 32 08 5F SSBFI.[.B.TPD2._ 2A080: 41 44 52 00 08 49 44 41 44 00 08 48 49 44 32 00 ADR..IDAD..HID2. 2A090: 08 5F 48 49 44 0D 45 4C 41 4E 30 36 33 34 00 08 ._HID.ELAN0634.. 2A0A0: 5F 43 49 44 0D 50 4E 50 30 43 35 30 00 08 5F 55 _CID.PNP0C50.._U 2A0B0: 49 44 01 14 4B 04 5F 44 53 4D 04 A0 3C 93 68 11 ID..K._DSM..<.h. 2A0C0: 13 0A 10 F7 F6 DF 3C 67 42 55 45 AD 05 B3 0A 3D ......<gBUE....= 2. check if touchpad then appear in /proc/bus/input/devices when applied. [Regression Potential] Low. Only add new IDs for currently unsupported platforms. ========== Original Bug Description ========== The Elan touchpad on my Lenovo Thinkbook isn't being detected, and hence isn't working. `sudo acpidump | grep -C3 ELAN` gives me the device's ACPI id: ```bash ghosthawkzero@EchelonV:~$ sudo acpidump | grep -C3 ELAN 2A060: 49 4E 54 31 70 0A 20 49 44 41 44 A4 84 53 42 46 INT1p. IDAD..SBF 2A070: 53 53 42 46 49 00 5B 82 42 0E 54 50 44 32 08 5F SSBFI.[.B.TPD2._ 2A080: 41 44 52 00 08 49 44 41 44 00 08 48 49 44 32 00 ADR..IDAD..HID2. 2A090: 08 5F 48 49 44 0D 45 4C 41 4E 30 36 33 34 00 08 ._HID.ELAN0634.. 2A0A0: 5F 43 49 44 0D 50 4E 50 30 43 35 30 00 08 5F 55 _CID.PNP0C50.._U 2A0B0: 49 44 01 14 4B 04 5F 44 53 4D 04 A0 3C 93 68 11 ID..K._DSM..<.h. 2A0C0: 13 0A 10 F7 F6 DF 3C 67 42 55 45 AD 05 B3 0A 3D ......<gBUE....= ghosthawkzero@EchelonV:~$ ``` Have attached the content from /proc/bus/input/devices. **EXPECTED** - touchpad to work **WHAT IS HAPPENING** - touchpad not detected and touchpad not working. More info: LSB release: ```bash ghosthawkzero@EchelonV:~$ lsb_release -rd Description: Ubuntu 19.10 Release: 19.10 ghosthawkzero@EchelonV:~$ ``` ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.3.0-29-generic 5.3.0-29.31 ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13 Uname: Linux 5.3.0-29-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ghosthawkzero 1493 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sun Feb 2 19:03:29 2020 InstallationDate: Installed on 2020-01-29 (3 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) MachineType: LENOVO 20SM ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-29-generic root=UUID=c070ef84-6265-4593-a4c3-b0ceddf7e9b4 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.3.0-29-generic N/A linux-backports-modules-5.3.0-29-generic N/A linux-firmware 1.183.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/11/2019 dmi.bios.vendor: LENOVO dmi.bios.version: DJCN14WW dmi.board.name: LVAC/LVAD dmi.board.vendor: LENOVO dmi.board.version: SDK0L77769 WIN dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ThinkBook 15-IIL dmi.modalias: dmi:bvnLENOVO:bvrDJCN14WW:bd12/11/2019:svnLENOVO:pn20SM:pvrLenovoThinkBook15-IIL:rvnLENOVO:rnLVAC/LVAD:rvrSDK0L77769WIN:cvnLENOVO:ct10:cvrLenovoThinkBook15-IIL: dmi.product.family: Thinkbook 15-IIL dmi.product.name: 20SM dmi.product.sku: LENOVO_MT_20SM_BU_idea_FM_Thinkbook 15-IIL dmi.product.version: Lenovo ThinkBook 15-IIL dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861610/+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
