Ubuntu – Lagging after update to 19.10 from 19.04


I updated my ubuntu 19.04 to 19.10. After updating there are plenty of lagging occurs in few seconds every time.

Issue is the cursor and keys freezes for a few seconds, especially when trying to switch windows.

I have hybrid graphics (intel and AMD). I try to play with those settings but no luck.

Here are the details of it:

  1. This is not a performance issue, system monitor is showing that
    resource usage (CPU, RAM, Drive) is under control.

  2. The issue gets worse with Ethernet and WiFi

  3. The issue gets worse with dual monitors

Please suggest some steps to find the root cause of this.

Best Answer

As verified in comments the solution to lagging is to reboot into grub's Advanced Options for Ubuntu menu and select an older kernel.

Going forward try out each new kernel the system installs until one finally works properly. You can tell when a new kernel is being installed because update-initramfs and update-grub run with very unique output. Additionally you will see the new kernels on the grub Advanced Options for Ubuntu menu.

Make sure you do not autoremove the kernel that is working for you now. The only way you can autoremove it is to boot into a newer kernel and type:

sudo apt autoremove

So don't do that!

Related Question