Console becomes blank when the system is manually crashed for testing kdump

Solution Verified - Updated -

Issue

  • Kdump is configured properly however upon issuing "echo c > /proc/sysrq-trigger", the system hangs.

  • Console becomes blank while testing kdump and even after waiting for 30 minutes, not able to see any output/progress on the console. Reboot is required to bring the server up.

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Systems having huge physical memory (greater than or equal to 1 TB)

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