For a month I've got a problem with my Acer TravelMate-P645-SG laptop's internal keyboard and touchpad that are not recognized. Now I'm using a USB keyboard, but it's quite annoying.
It all started on Ubuntu 20.04, after some updates (maybe caused by a kernel update). I've done a lot of tests, upgrading, downgrading, etc. Now I upgraded Ubuntu from 20.04 to 20.10 and the kernel to the latest available version (5.10.8-051008-generic), but still no solution can be found.
$ lsusb
Bus 001 Device 002: ID 8087:8001 Intel Corp. Integrated Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 007: ID 1c7a:0603 LighTuning Technology Inc. ES603 Swipe Fingerprint Sensor
Bus 002 Device 006: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 002 Device 005: ID 12d1:1570 Huawei Technologies Co., Ltd. HUAWEI Mobile Broadband Module
Bus 002 Device 004: ID 04f2:b495 Chicony Electronics Co., Ltd HD WebCam
Bus 002 Device 003: ID 0458:003a KYE Systems Corp. (Mouse Systems) NetScroll+ Mini Traveler / Genius NetScroll 120
Bus 002 Device 002: ID 1a2c:2124 China Resource Semico Co., Ltd Keyboard
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub</code>
$ lspci
00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection (3) I218-LM (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3)
00:1c.4 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #5 (rev e3)
00:1c.5 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 (rev e3)
00:1d.0 USB controller: Intel Corporation Wildcat Point-LP USB EHCI Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 48)
03:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 840M] (rev a2)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader (rev 01)
