Black titlebar (CSD) in Tweak Tool, flickering

[Asif Youssuff]

Seeing weird visual appearance in Gnome tweak tool.

Top corners are sometimes not curved, they also flicker between white and the expected.

The entire top panel becomes black and flickers.

See screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: gnome-tweak-tool 3.34.0-2
ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0
Uname: Linux 5.3.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Oct 9 15:28:11 2019
InstallationDate: Installed on 2019-08-30 (40 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190819)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-kitty
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-tweaks
UpgradeStatus: No upgrade log present (probably fresh install)

[[e-mail] (vijayaavaas)]

the same problem with setting winodow title bar. i need to switch through other applications and come back to get the expected complete dialogue box. in addition to this bug what i realize in my system is the gnome tweak window keeps flickering when cursor hovers above it. sad.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[[e-mail] (vijayaavaas)]

its not only in gnome tweak. it happens in setting window as well. i have attached the video recorded with my mobile because screenrecording was always an error(i don't know why).

please analyse the issue.

thank you.

[xalt7x (xalt7x)]

This bug is very easy to reproduce, especially with default X session

- Open gnome-tweaks
- Window Titlebar -> Placement: Left
- Relaunch few times until you see black Window Titlebar with missing buttons. If you try to resize window buttons will re-appear

With Wayland session this bug is slightly different. After you restart gnome-tweaks with left-aligned titlebar buttons visually everything is correct. But if you try to select something on the sidebar window will start to flicker. Again, resize also helps here.

[Michael Kuster (user240)]

for workaround you can copy the file

/usr/share/applications/org.gnome.tweaks.desktop

to your home folder

~/.local/share/applications

and change the following line in org.gnome.tweaks.desktop:

from:
StartupNotify=true

to:
StartupNotify=false

hope this helps 😜

ps: don't forget to restart the shell by pressing the key's:
Alt + F2
r
ENTER