xmonad normally honours those requests by doing exactly what the client application asked, and refreshing. There are some misbehaving clients, however, that:

• try to move their window to the last known absolute position regardless of the current xrandr/xinerama layout
• move their window to 0, 0 for no particular reason (e.g. rxvt-unicode)
• issue lots of no-op requests causing flickering (e.g. Steam)

This module provides a replacement handler for ConfigureRequestEvent to work around such misbehaviours.

To use this, include the following in your xmonad.hs:

import XMonad.Hooks.FloatConfigureReq
import XMonad.Hooks.ManageHelpers

myFloatConfReqHook :: MaybeMaybeManageHook
myFloatConfReqHook = composeAll
    [ … ]

myEventHook :: Event -> X All
myEventHook = mconcat
    [ …
    , floatConfReqHook myFloatConfReqHook
    , … ]

main = xmonad $ …
              $ def{ handleEventHook = myEventHook
                   , … }

Then fill the myFloatConfReqHook with whatever custom rules you need.

As an example, the following will prevent rxvt-unicode from moving its (floating) window to 0, 0 after a font change but still ensure its size increment hints are respected:

className =? "URxvt" -?> pure <$> doFloat

Another example that avoids flickering and xmonad slowdowns caused by the Steam client (completely ignore all its requests, none of which are meaningful in the context of a tiling WM):

map toLower `fmap` className =? "steam" -?> mempty

(this example is also available as fixSteamFlickerMMMH to be added to one's myFloatConfReqHook and also fixSteamFlicker to be added directly to one's handleEventHook)