Public bug reported:

Fresh install of Ubuntu Mate 20.04 development release. Machine has a
GTX650 and I opted to install the proprietary drivers at install time.

Some windows, such as the "Logout" window, draw very slowly. A frame and
titlebar appears for a second before the window expands and draws
content. I can't replicate this on my laptop which is using Intel
drivers; the windrow drawing is instant there. See the attached GIF.

What should happen:
- Window should appear instantly

What actually happens:
- Window title and frame appears, waits a second then the window expands and 
content is drawn

There is no improvement if I switch off compositing in Mate Tweaks.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: marco 1.24.0-1
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Uname: Linux 5.4.0-18-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Mar 20 22:23:17 2020
InstallationDate: Installed on 2020-03-20 (0 days ago)
InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Alpha amd64 (20200320)
SourcePackage: marco
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: marco (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

** Attachment added: "sluggish_window.gif"
   
https://bugs.launchpad.net/bugs/1868328/+attachment/5339496/+files/sluggish_window.gif

** Description changed:

  Fresh install of Ubuntu Mate 20.04 development release. Machine has a
  GTX650 and I opted to install the proprietary drivers at install time.
  
  Some windows, such as the "Logout" window, draw very slowly. A frame and
  titlebar appears for a second before the window expands and draws
  content. I can't replicate this on my laptop which is using Intel
  drivers; the windrow drawing is instant there. See the attached GIF.
  
  What should happen:
  - Window should appear instantly
  
  What actually happens:
  - Window title and frame appears, waits a second then the window expands and 
content is drawn
  
- There is no improvement if I switch of compositing in Mate Tweaks.
+ There is no improvement if I switch off compositing in Mate Tweaks.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: marco 1.24.0-1
  ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
  Uname: Linux 5.4.0-18-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu20
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Fri Mar 20 22:23:17 2020
  InstallationDate: Installed on 2020-03-20 (0 days ago)
  InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Alpha amd64 
(20200320)
  SourcePackage: marco
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1868328

Title:
  Some windows draw slowly with nvidia-440 drivers

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