Nouveau X.org: Stale texture data and flicker in small SDL2 program, but nvidia-440 works

[Kevin Cahalan]

Video of bug: https://youtu.be/O0__VNN9G_o

At 0:11 in the video you see old web browser data showing up in my program.

At 0:19 when I close a window in my program the texture for my piano key letters
flicker. By luck the texture for my keys sometimes flickers to stuff previously
displayed on my desktop. This flickering is linked to my mouse movement/placement.

When I run my program with the proprietary 440 NVIDIA driver things work fine.
I am on Ubuntu budgie 20.04 using XFCE on X.org X11.

The SDL2 program source:

https://github.com/kevinacahalan/piano_waterfall

git hash 553bb6c8ca18b23494a6c92f4551baa1649f0374

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
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: XFCE
Date: Fri Aug 7 23:35:05 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 v4l2loopback, 0.12.3, 5.4.0-40-generic, x86_64: installed
 v4l2loopback, 0.12.3, 5.4.0-42-generic, x86_64: installed
 virtualbox, 6.1.10, 5.4.0-40-generic, x86_64: installed
 virtualbox, 6.1.10, 5.4.0-42-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation GP107 [GeForce GTX 1050 Ti] [10de:1c82] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: eVga.com. Corp. GP107 [GeForce GTX 1050 Ti] [3842:6251]
InstallationDate: Installed on 2020-05-05 (95 days ago)
InstallationMedia: Ubuntu-Budgie 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Dell Inc. OptiPlex 3010
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic root=UUID=5fe179e5-be36-426b-9297-8ef7a1af2c0c ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/31/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 042P49
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd01/31/2013:svnDellInc.:pnOptiPlex3010:pvr01:rvnDellInc.:rn042P49:rvrA01:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 3010
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
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.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
xserver.bootTime: Fri Aug 7 21:38:07 2020
xserver.configfile: default
xserver.errors: client bug: timer event11 debounce short: scheduled expiry is in the past (-2ms), your system is too slow
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.20.8-2ubuntu2.2
xserver.video_driver: modeset

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

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