Here's the calibre window that tries to open xwininfo: Window id: 0x2400012 "calibre - || Calibre Library ||"
Absolute upper-left X: 144 Absolute upper-left Y: 52 Relative upper-left X: 0 Relative upper-left Y: 0 Width: 16383 Height: 16383 Depth: 24 Visual: 0x21 Visual Class: TrueColor Border width: 0 Class: InputOutput Colormap: 0x20 (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: +144+52 --15247+52 --15247--15635 +144--15635 -geometry 16383x16383+144+24
Here's the calibre window that tries to open
xwininfo: Window id: 0x2400012 "calibre - || Calibre Library ||"
Absolute upper-left X: 144
Absolute upper-left Y: 52
Relative upper-left X: 0
Relative upper-left Y: 0
Width: 16383
Height: 16383
Depth: 24
Visual: 0x21
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x20 (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: +144+52 --15247+52 --15247--15635 +144--15635
-geometry 16383x16383+144+24