Cfrgtkky

Yesterday I upgraded from Ubuntu 16.10 to 18.04 via terminal, so issuing the following commands

sudo apt update

sudo apt upgrade

sudo apt dist-upgrade

sudo apt autoremove

then I changed some file in the /etc directory (can't find that page with the instructions I followed any more) and then I issued

sudo apt do-release-upgrade

Everything fine on the page where one chooses the account: the cursor moves correctly in all directions. However after the OS loads, the mouse cursor can only move vertically close to the right edge of the screen. I can still click the link and objects that are on its way, but it does not follow my movements on the touchpad. So I don't know where the problem lies.

Can anyone spot the problem or has encountered a similar issue? Thanks

UPDATE

To move the cursor in all directions I must hold the left button of the mouse pressed.

UPDATE 2

Output of 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

Output of 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) <en_GB@li.org>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) <en_GB@li.org>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) <en_GB@li.org>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) <en_GB@li.org>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) <en_GB@li.org>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) <en_GB@li.org>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