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pop tips system  seems broken with recent update,the pop tips keep flashing.hover mouse on thunar sidepanel item such as Filesystem ,easily to reproduce it .and select 'show tips for app' in whisker  didnt work 
  ,g$$P"     """Y$$.".        OS: Debian GNU/Linux unstable (sid) x86_64 
 ,$$P'              `$$$.     Kernel: 4.18.0-2-amd64 
',$$P       ,ggs.     `$$b:   Uptime: 11 mins 
`d$$'     ,$P"'   .    $$$    Packages: 1605 (dpkg) 
 $$P      d$'     ,    $$P    Shell: bash 4.4.23 
 $$:      $$.   -    ,d$$'    Resolution: 1920x1080 
 $$;      Y$b._   _,d$P'      DE: Xfce 
 Y$$.    `.`"Y$$$$P"'         WM: Xfwm4 
 `$$b      "-.__              WM Theme: Vimix-Light 
  `Y$$                        Theme: Adwaita [GTK2] 
   `Y$$.                      Icons: Faenza [GTK2] 
     `$$b.                    Terminal: xterm 
       `Y$$b.                 CPU: Intel i5-4590 (4) @ 3.700GHz 
          `"Y$b._             GPU: NVIDIA GeForce GTX 750 Ti 
              `"""            Memory: 2045MiB / 7897MiB 
~$ thunar --version
Thunar 1.8.1 (Xfce 4.12)Last edited by FateRover (2018-10-06 07:32:28)
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I think this might be two different problems with similar symptoms. Can you try using a gtk3-compatible theme like Greybird or Arc to see if the problem replicates? It looks like you are only using a GTK2 version of Adwaita (and I'm not sure if this an actual package or if the package includes GTK3 configs or if those configs are up to date). If that doesn't help, can you post back any contents of ~/.config/gtk-3.0/settings.ini and ~/.config/gtk-3.0/gtk.css?
As for whiskermenu, I think you have found a bug. The popups don't work for me either. You should probably create a bug report.
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I dont think it is theme related。xfce never load GTK3 themes on my machine even the themepack contain GTK3 parts。 and there is no .gtk3.css in my profile
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Can you post back the results of the following commands:
ls -l ~/.config/gtk-3.0
ls -l /etc/gtk-3.0
xfconf-query -c xsettings -lvMark solved threads as [SOLVED] to make it easier for others to find solutions.
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pad@Padmin:~$ ls -l ~/.config/gtk-3.0
总用量 0
pad@Padmin:~$ ls -l /etc/gtk-3.0
总用量 4
-rw-r--r-- 1 root root 890 9月  30 23:45 im-multipress.conf
pad@Padmin:~$ xfconf-query -c xsettings -lv
/Gtk/ButtonImages               true
/Gtk/CanChangeAccels            false
/Gtk/ColorPalette               black:white:gray50:red:purple:blue:light blue:green:yellow:orange:lavender:brown:goldenrod4:dodger blue:pink:light green:gray10:gray30:gray75:gray90
/Gtk/CursorThemeName            
/Gtk/CursorThemeSize            0
/Gtk/DecorationLayout           menu:minimize,maximize,close
/Gtk/FontName                   Sans 10
/Gtk/IconSizes                  
/Gtk/KeyThemeName               
/Gtk/MenuBarAccel               F10
/Gtk/MenuImages                 true
/Gtk/MonospaceFontName          Monospace 10
/Gtk/ToolbarIconSize            3
/Gtk/ToolbarStyle               icons
/Net/CursorBlink                true
/Net/CursorBlinkTime            1200
/Net/DndDragThreshold           8
/Net/DoubleClickDistance        5
/Net/DoubleClickTime            400
/Net/EnableEventSounds          false
/Net/EnableInputFeedbackSounds  false
/Net/IconThemeName              Numix White
/Net/SoundThemeName             default
/Net/ThemeName                  victory-gtk-theme-18.07
/Xft/Antialias                  -1
/Xft/Hinting                    -1
/Xft/HintStyle                  hintnone
/Xft/RGBA                       noneOffline
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