xflock4 flashes the screen

Grant emailgrant at gmail.com
Sun Sep 16 13:28:24 CEST 2012

If I issue 'xflock4', the screen flashes as the backlight appears to
be turned off and then back on again.  If I issue 'xlock', the
blacklight stays on the whole time with no flashing effect.  Should
the xflock4 script be modified to prevent this?

- Grant

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