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In May 2021 i upgraded from 18.04 to 20.04 OS. My computers performance dropped significantly, the brightness dropped a lot, and I cannot move icons on the desktop, and i do not have the option of 9:4 resolution for monitor settings.

The performance is slow; it takes few to several seconds when opening and closing applications, including browser tabs.

The Brightness is very low, inspite of setting up high brightness on my Dell monitor menu settings. I did install the Brightness Controller application, but it did not help me fix the problem.

I cannot move any of my icons on the desktop, and I do not have the option of setting my window resolution to 9:4.

I am using Ubuntu 20.04.2 LTS; Intel Celeron CPU G1610 2.6Ghz*2; Intel HD Graphics 2500 IVB (GT1); 64-bit; GNOME version 3.36.8; and Kernel v.5.12.9.

Thank you for your time.

Robi3
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  • You have multiple problems and the cause for each problem is unclear. It will likely be less time and effort to just reinstall the OS. – Nmath Jun 08 '21 at 22:17
  • Have you tried a supported kernel? Does your *testing* kernel have ubuntu sauce added? If you're a newbie, you're best sticking with supported kernels (moving to other or *testing* kernels means you've taken over the security concerns of back-porting fixes which isn't really a newbie friendly task; it's time consuming even when you know what you're doing!) – guiverc Jun 08 '21 at 22:19
  • Check your power saving settings. All of these are symptoms of a laptop being put into power saving mode when on battery. – user10489 Jun 09 '21 at 00:57
  • I checked under settings, power; under power savings i have the option to set blank screen, which i have set to 1 hr. – Robi3 Jun 09 '21 at 05:37
  • Does this answer your question? [How to remove GNOME Shell from Ubuntu 20.04 LTS to install other desktop environment from scratch?](https://askubuntu.com/questions/1233025/how-to-remove-gnome-shell-from-ubuntu-20-04-lts-to-install-other-desktop-environ) – N0rbert Jun 09 '21 at 06:14
  • During my search for solutions I came across the suggestion to install the Ubuntu Mainline Kernel Installer and update to the latest version of kernel. So, I did. It did not help fix the performance problem. I do not understand how to tell the difference between supported and testing kernel, nor the meaning of 'ubuntu sauce added.' Could you help me understand? – Robi3 Jun 09 '21 at 07:34
  • I also do not understand the meaning of 'security concerns of back-porting fixes.' What is back-porting? – Robi3 Jun 09 '21 at 07:34
  • Actually I noticed this slowness on my system, too. Similar upgrade path, from 2018 LTS to current 2020 LTS. I started up an X session with DWM (a very fast and lightweight window manager), and could *see* the WM struggling to render windows. This is with 14GB of free RAM on a freshly launched X11 session, mind you. `lsb_release -a` gives `20.04.2 LTS` and `uname -a` gives `5.4.0.77-generic` – Braden Best Jul 27 '21 at 16:49
  • I'll get back to you on whether an apt update+upgrade does anything in like, 3-4 hours or whenever my shit ass ISP decides it's time to restore the shit ass unreliable internet I pay $50 a month for – Braden Best Jul 27 '21 at 16:54
  • I did the update+upgrade with no restart and X11 still launches with very poor performance – Braden Best Jul 27 '21 at 19:19
  • I have isolated the problem to my copy of DWM. Starting a bare x11 session with just an st terminal results in a snappy terminal taking up its tiny corner of the screen. Starting it with dwm results in extremely slow window render and reaction time, regardless of whether my custom desktop environment is involved – Braden Best Jul 27 '21 at 19:29

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