昨天我通过终端将 Ubuntu 16.10 升级到 18.04，因此发出以下命令
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
然后我修改了目录中的某些文件/etc（找不到我按照说明操作的页面），然后我发出
sudo apt do-release-upgrade
在选择帐户的页面上，一切都很好：光标可以向所有方向正确移动。但是，在操作系统加载后，鼠标光标只能垂直移动到屏幕右边缘附近。我仍然可以点击链接和正在移动的对象，但它不会跟随我在触摸板上的移动。所以我不知道问题出在哪里。
有人能发现这个问题吗？或者遇到过类似的问题吗？谢谢
更新
要向各个方向移动光标，我必须按住鼠标左键。
更新2
输出uname -a：
Linux gigi 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
输出sudo lshw -C memory：
*-firmware
description: BIOS
vendor: LENOVO
physical id: 0
version: DCCN34WW(V2.03)
date: 12/01/2015
size: 128KiB
capacity: 6080KiB
capabilities: pci upgrade shadowing cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb biosbootspecification uefi
*-cache:0
description: L1 cache
physical id: 6
slot: L1 Cache
size: 64KiB
capacity: 64KiB
capabilities: synchronous internal write-back instruction
configuration: level=1
*-cache:1
description: L2 cache
physical id: 7
slot: L2 Cache
size: 512KiB
capacity: 512KiB
capabilities: synchronous internal write-back unified
configuration: level=2
*-cache:2
description: L3 cache
physical id: 8
slot: L3 Cache
size: 3MiB
capacity: 3MiB
capabilities: synchronous internal write-back unified
configuration: level=3
*-cache
description: L1 cache
physical id: 5
slot: L1 Cache
size: 64KiB
capacity: 64KiB
capabilities: synchronous internal write-back data
configuration: level=1
*-memory
description: System Memory
physical id: 26
slot: System board or motherboard
size: 4GiB
*-bank:0
description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
product: M471B5173EB0-YK0
vendor: Samsung
physical id: 0
serial: 00111043
slot: ChannelA-DIMM0
size: 4GiB
width: 64 bits
clock: 1600MHz (0.6ns)
*-bank:1
description: Project-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <[email protected]>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719)Project-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <[email protected]>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719) [empty]
physical id: 1
slot: ChannelA-DIMM1
*-bank:2
description: Project-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <[email protected]>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719)Project-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <[email protected]>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719) [empty]
physical id: 2
slot: ChannelB-DIMM0
*-bank:3
description: Project-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <[email protected]>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719)Project-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <[email protected]>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719) [empty]
physical id: 3
slot: ChannelB-DIMM1
*-memory UNCLAIMED
description: Memory controller
product: Sunrise Point-LP PMC
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 21
width: 32 bits
clock: 33MHz (30.3ns)
capabilities: bus_master
configuration: latency=0
resources: memory:a1324000-a1327fff