Unable to reboot the system while kdm is running with multiple Xorg instances

Solution Verified - Updated -

Issue

  • Red Hat Enterprise Linux 6 OS is running multiple Xorg session launched via KDM.
  • Unable to shutdown or reboot the system during this time as Xorg is stuck.
  • Killing all running Xorg processes resumes system shutdown/reboot process.
  • Problem is specific to KDM and not observed while using GDM

Environment

  • Red Hat Enterprise Linux 6
  • KDM
  • Xorg

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