Color depth for panel is 32 regardless of DefaultDepth=24 in xorg.conf

Submitted by max..@..oo.com

Assigned to Xfce Bug Triage

Link to original bug (#15875)

Description

I'm trying to decrease color depth in xfce desktop (cause of FRC display problems) via xorg.conf "DefaultDepth 24" in Screen section, but some UI elements are still with 32 bit depth, e.g. XFCE panel have Depth 32:

xwininfo: Window id: 0xe00004 "xfce4-panel"

  Absolute upper-left X:  0
  Absolute upper-left Y:  1167
  Relative upper-left X:  0
  Relative upper-left Y:  0
  Width: 1920
  Height: 33
  Depth: 32
  Visual: 0x4e3
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0xe00003 (not installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +0+1167  -0+1167  -0-0  +0-0
  -geometry 1920x33+0-0

Same wrong depth is also on terminal window.

NB: Main desktop window has 24 bit depth

Version: 4.12.1