screensaver unlcok window is not visible

[DarkKnight BrightWarrior]

Hi,

*Environment:*
I am using CentOS 5.3 operating system. I upgraded xorg of centos to 7.3.
I am using intel 945 GM board. My xorg server version is 1.4.2 and inetl
driver version 2.4.3.

*Problem:*
I connected another system of same hardware using VGA output. Now I can see
clone of my system on secondary display.
I enabled screensaver with 1 minute period and also enabled locking feature
using gnome-screensaver-preferences.
After 1 minute screensaver appeared on both primary and secondary displays.
But when I move mouse or press any key, Screen saver unlock dialog is not
appearing.
But when I type password, I am able to comeout of screensaver. So Screensver
unlock dialog is there but it is not visible.
When I remove secondary display, I mean when I am in single display mode
screen saver unlock dialog is visible and working fine.
So what could be the problem that causing screensaver unlock dialog window
to appear/visible in clone/extended monitor mode.

Any suggestions?

Thanks
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