Ytdyklly

I have updated to linux 18.04 (it's a pop os machine, which was based on the previous version of ubuntu) using do-release-upgrade and now the touchpad cursor freezes if I move it a bit quickly.

That is, if I move it slowly and steady it works, but as soon as I accelerate a little bit it blocks, and then I have to raise my finger and put it down once again. All this is really annoying.

The usb mouse works ok, on the other hand.

Some info about my linux

sas@pop-os:~$ inxi -Fxxxz

System:    Host: pop-os Kernel: 4.15.0-45-generic x86_64 bits: 64 gcc: 7.3.0

           Desktop: Gnome 3.28.3 (Gtk 3.22.30-1ubuntu1) info: gnome-shell dm: gdm3

           Distro: Pop!_OS 18.04 LTS

Machine:   Device: portable System: Dell product: Dell System XPS L321X serial: N/A

           Mobo: Dell model: N/A serial: N/A

           UEFI [Legacy]: Dell v: A01 date: 12/27/2011

           Chassis: type: 8 v: 0.1 serial: N/A

Battery    BAT0: charge: 2.8 Wh 18.0% condition: 15.7/47.7 Wh (33%) volts: 7.7/7.4

           model: SDI Dell Li-ion serial: <filter>status: Charging cycles: 0

CPU:       Dual core Intel Core i5-2467M (-MT-MCP-) 

           arch: Sandy Bridge rev.7 cache: 3072 KB

           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 6385

           clock speeds: min/max: 800/2300 MHz 1: 990 MHz 2: 850 MHz 3: 922 MHz

           4: 970 MHz

Graphics:  Card: Intel 2nd Generation Core Integrated Graphics Controller

           bus-ID: 00:02.0 chip-ID: 8086:0116

           Display Server: x11 (X.Org 1.19.6 ) driver: i915

           Resolution: 1366x768@60.00hz

           OpenGL: renderer: Mesa DRI Intel Sandybridge Mobile

           version: 3.3 Mesa 18.2.2 (compat-v: 3.0) Direct Render: Yes

Audio:     Card Intel 6 Series/C200 Series Family High Def. Audio Controller

           driver: snd_hda_intel bus-ID: 00:1b.0 chip-ID: 8086:1c20

           Sound: Advanced Linux Sound Architecture v: k4.15.0-45-generic

Network:   Card: Intel Centrino Advanced-N 6230 [Rainbow Peak]

           driver: iwlwifi bus-ID: 02:00.0 chip-ID: 8086:0091

           IF: wlp2s0 state: up mac: <filter>

Drives:    HDD Total Size: 128.0GB (85.6% used)

           ID-1: /dev/sda model: SAMSUNG_SSD_PM83 size: 128.0GB

           serial: <filter> temp: 0C

Partition: ID-1: / size: 14G used: 11G (84%) fs: ext4 dev: /dev/sda1

RAID:      System: supported: linear multipath raid0 raid1 raid6 raid5 raid4 raid10

           No RAID devices: /proc/mdstat, md_mod kernel module present

           Unused Devices: none

Sensors:   System Temperatures: cpu: 56.0C mobo: 56.0C

           Fan Speeds (in rpm): cpu: N/A

Info:      Processes: 251 Uptime: 14 min Memory: 2180.2/3830.9MB

           Init: systemd v: 237 runlevel: 5 Gcc sys: 7.3.0

           Client: Shell (bash 4.4.191 running in terminator) inxi: 2.3.56 

sas@pop-os:~$ uname -a

Linux pop-os 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux



sas@pop-os:~$ ls /usr/bin/*session

/usr/bin/dbus-run-session  /usr/bin/gnome-session-custom-session

/usr/bin/gnome-session

sas@pop-os:~$ xinput 

⎡ Virtual core pointer                      id=2  [master pointer  (3)]

⎜   ↳ Virtual core XTEST pointer                id=4  [slave  pointer  (2)]

⎜   ↳ OM                                        id=11 [slave  pointer  (2)]

⎜   ↳ CyPS/2 Cypress Trackpad                   id=14 [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)]

    ↳ Sleep Button                              id=9  [slave  keyboard (3)]

    ↳ Laptop_Integrated_Webcam_1.3M:            id=10 [slave  keyboard (3)]

    ↳ Dell WMI hotkeys                          id=12 [slave  keyboard (3)]

    ↳ AT Translated Set 2 keyboard              id=13 [slave  keyboard (3)]

I tried with several commands, but couldn't find one that gives me information about the touchpad.

edit: I found a couple of questions with similar troubles.

How do I make my Dell XPS 13 Developer Edition touchpad work correctly in 18.04?

https://askubuntu.com/a/262364/26067

Synaptic touchpad on laptop not working

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1096046

this workaround sort of works, but the touchpad configuration is lost (no click on touch, no two-fingers scroll, etc.) as pointed in here