[nvidia] Some apps are partially transparent/corrupt

NVidia drivers in Ubuntu 20.04 show corruption in certain applications. Most egregious bug appears to be "Ubuntu Software Center" which is almost completely transparent and unusable.

Also see occasional corruption in window decorations in other apps, namely Gnome Tweaks as a prime example.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: lkp_Ubuntu_5_4_0_42_46_generic_70 nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.100 Fri May 29 08:45:51 UTC 2020
 GCC version:
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 31 13:33:16 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Subsystem: Dell UHD Graphics 630 (Desktop 9 Series) [1028:08f7]
 NVIDIA Corporation TU104 [GeForce RTX 2080 Rev. A] [10de:1e87] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell TU104 [GeForce RTX 2080 Rev. A] [1028:3729]
InstallationDate: Installed on 2020-06-25 (67 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Alienware Alienware Aurora R8
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic root=UUID=c80a6058-31c8-4117-a747-3193e765eff9 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/20/2020
dmi.bios.vendor: Alienware
dmi.bios.version: 1.0.12
dmi.board.name: 02XRCM
dmi.board.vendor: Alienware
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Alienware
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnAlienware:bvr1.0.12:bd02/20/2020:svnAlienware:pnAlienwareAuroraR8:pvr1.0.12:rvnAlienware:rn02XRCM:rvrA00:cvnAlienware:ct3:cvrNotSpecified:
dmi.product.family: Alienware
dmi.product.name: Alienware Aurora R8
dmi.product.sku: 08F7
dmi.product.version: 1.0.12
dmi.sys.vendor: Alienware
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1