Hey there, sorry to hear you're stuck with this annoying cursor issue—it's such a hassle when basic input tools don't behave like they should! Since you've already tried synclient and swapping to a wireless mouse without luck, let's go through some targeted troubleshooting steps that might get things back on track.

• First, check your input device recognition
  Open up a terminal and run this command to see all devices your system detects:
  xinput list
  Double-check that both your trackpad and wireless mouse show up here. If either is missing, we might need to dig into hardware recognition, but since both are acting up, it's more likely a system-wide driver or config problem.

• Reset your Xorg configuration
  Sometimes Xorg's config files can get corrupted or misconfigured. Let's back up the current one and generate a fresh default setup:

  sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.bak
  sudo rm /etc/X11/xorg.conf
  

  Reboot your system after running these commands—Xorg will automatically create a new config on startup, which might fix the cursor glitch.

• Switch to libinput (replace synaptics)
  Synaptics is being phased out in newer Ubuntu-based distros, and Lubuntu 22.04 tends to work better with libinput. Let's make that switch:
  First, uninstall synaptics if you installed it earlier:
  sudo apt remove xserver-xorg-input-synaptics
  Then install the libinput packages:
  sudo apt install xserver-xorg-input-libinput xserver-xorg-input-libinput-dev
  Reboot your system, then run libinput-list-devices to confirm your devices are being handled by libinput. Check if the cursor behaves normally now.

• Update your system fully
  Outdated packages can cause compatibility issues. Let's make sure everything is up to date:
  sudo apt update && sudo apt upgrade -y
  Once the updates finish, reboot and see if the cursor problem is gone.

• Test with a different desktop session
  Since Lubuntu uses LXQt, it's possible a component in the desktop environment is causing the issue. When you log in, click the small gear icon next to your username and select "Openbox" to launch a simpler session. If the cursor works fine here, the problem is likely with LXQt—you can try reinstalling the core desktop packages to fix it:
  sudo apt install --reinstall lubuntu-desktop

Let me know if any of these steps resolve your cursor issue, or if you need help working through any of them!

备注：内容来源于stack exchange，提问作者MvCs