1st client to Xephyr
DISPLAY=:2.2 qttools/bin/qdbusviewer
xcb_connect using 2
Using threaded event reader with xcb_poll_for_queued_event

Screen output default of xcb screen 0:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37d
<custom> primaryScreen 0x0 primary 0x1cb45b0 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0

Screen output default of xcb screen 1:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37f
<custom> primaryScreen 0x0 primary 0x1cb45b0 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0

Screen output default of xcb screen 2:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 381
<custom> primaryScreen 0x0 primary 0x1cb45b0 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
<custom> primaryScreen 0x0 primary 0x1cf7810 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0
<custom> primaryScreen 0x0 primary 0x1cf7c70 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0
<custom> primaryScreen 0x0 primary 0x1cf7d70 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
<custom> primaryScreen 0x0 primary 0x1cf7de0 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0
<custom> primaryScreen 0x0 primary 0x1cb45e0 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0
<custom> primaryScreen 0x0 primary 0x1cf7c40 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
<custom> primaryScreen 0x0 primary 0x1cb4610 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0
<custom> primaryScreen 0x0 primary 0x1cf7c70 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0
<custom> primaryScreen 0x0 primary 0x1cf7de0 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default

(killing connecting again looks the same),

1st run after xeyes is running
DISPLAY=:2.2 qttools/bin/qdbusviewer
xcb_connect using 2
Using threaded event reader with xcb_poll_for_queued_event

Screen output default of xcb screen 0:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37d
<custom> primaryScreen 0x0 primary 0x7f8b6c000a00 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0

Screen output default of xcb screen 1:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37f
<custom> primaryScreen 0x0 primary 0x7f8b6c000a00 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0

Screen output default of xcb screen 2:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 381
<custom> primaryScreen 0x0 primary 0x7f8b6c000a00 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
<custom> primaryScreen 0x0 primary 0x7f8b6c001920 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0
<custom> primaryScreen 0x0 primary 0x7f8b6c001920 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0
<custom> primaryScreen 0x0 primary 0x7f8b6c001920 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
<custom> primaryScreen 0x0 primary 0x7f8b6c0009d0 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0
<custom> primaryScreen 0x0 primary 0x7f8b6c0009d0 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0
<custom> primaryScreen 0x0 primary 0x7f8b6c0009d0 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
<custom> primaryScreen 0x0 primary 0x7f8b6c0008b0 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0
<custom> primaryScreen 0x0 primary 0x7f8b6c0008b0 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0
<custom> primaryScreen 0x0 primary 0x7f8b6c0008b0 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default

2nd run while xeyes continues to run
DISPLAY=:2.2 qttools/bin/qdbusviewer
xcb_connect using 2
Using threaded event reader with xcb_poll_for_queued_event

Screen output default of xcb screen 0:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37d
<custom> primaryScreen 0x0 primary 0xc06d60 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0

Screen output default of xcb screen 1:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37f
<custom> primaryScreen 0x0 primary 0x7ff878002e20 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0

Screen output default of xcb screen 2:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 381
<custom> primaryScreen 0x0 primary 0x7ff878002e20 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)


3rd run while xeyes continues to run
DISPLAY=:2.2 qttools/bin/qdbusviewer
xcb_connect using 2
Using threaded event reader with xcb_poll_for_queued_event

Screen output default of xcb screen 0:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37d
<custom> primaryScreen 0x0 primary 0x8b3d60 m_primaryScreen 2 xcbScreenNumber 0 primary->output 0 outputs[i] 902 primary->output 0

Screen output default of xcb screen 1:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 37f
<custom> primaryScreen 0x0 primary 0x7f2c4c0030d0 m_primaryScreen 2 xcbScreenNumber 1 primary->output 0 outputs[i] 919 primary->output 0

Screen output default of xcb screen 2:
  width..........: 108.000000
  height.........: 81.000000
  geometry.......: 320 x 240 +0 +0
  virtual width..: 108.000000
  virtual height.: 81.000000
  virtual geom...: 320 x 240
  avail virt geom: 320 x 240 +0 +0
  depth..........: 24
  white pixel....: ffffff
  black pixel....: 0
  refresh rate...: 0
  root ID........: 381
<custom> primaryScreen 0x0 primary 0x7f2c4c0030d0 m_primaryScreen 2 xcbScreenNumber 2 primary->output 0 outputs[i] 921 primary->output 0
Primary output is 0: default
xkbcommon: ERROR: Couldn't find file "rules/" in include paths
xkbcommon: ERROR: 1 include paths searched:
xkbcommon: ERROR:       /usr/share/X11/xkb
xkbcommon: ERROR: 1 include paths could not be added:
xkbcommon: ERROR:       /home/david/.xkb
xkbcommon: ERROR: Couldn't look up rules '', model '', layout 'us', variant '(null)', options ''
Qt: Failed to compile a keymap
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)

"xkbcommon: ERROR:" errors seem to be random if the show or not, but never if
it is :2.0 or :2.1 if I have four screens, :2.2 and :2.3 still never :2.0 or
:2.1