notification for some apps cannot be disabled in ubuntu 20.04 release

[Sandbo Chang]

I tried to disable the pop-up notification for Dropbox, which shows some files were changed once I saved my file in an app (that sits inside Dropbox folder).

Turning off the notification in the notification center does not stop the pop-ups from showing. Turning on do not disturb does help, however.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
Uname: Linux 5.4.0-40-generic x86_64
NonfreeKernelModules: rcraid
ApportVersion: 2.20.11-0ubuntu27.4
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 Jul 20 01:58:10 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 rcraid, 8.1.0, 5.4.0-37-generic, x86_64: installed
 rcraid, 8.1.0, 5.4.0-39-generic, x86_64: installed
 rcraid, 8.1.0, 5.4.0-40-generic, x86_64: installed
 xpad, 0.4, 5.4.0-40-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XTX [Radeon Vega Frontier Edition] [1002:6863] (prog-if 00 [VGA controller])
   Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XTX [Radeon Vega Frontier Edition] [1002:6b76]
InstallationDate: Installed on 2020-04-25 (85 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Gigabyte Technology Co., Ltd. X570 I AORUS PRO WIFI
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-40-generic root=UUID=a46fdd55-3a51-4c71-b5a5-cb35298c18e9 ro quiet splash modprobe.blacklist=ahci vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/06/2020
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F12e
dmi.board.asset.tag: Default string
dmi.board.name: X570 I AORUS PRO WIFI
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF12e:bd03/06/2020:svnGigabyteTechnologyCo.,Ltd.:pnX570IAORUSPROWIFI:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnX570IAORUSPROWIFI:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: Default string
dmi.product.name: X570 I AORUS PRO WIFI
dmi.product.sku: Default string
dmi.product.version: -CF
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.1.3~kisak1~f
version.libgl1-mesa-glx: libgl1-mesa-glx 20.1.3~kisak1~f
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