System console is unusable with kernel-2.6.32-504.el6.x86_64

Solution In Progress - Updated -

Issue

  • Unable to use system console with latest kernel(2.6-32-504.el6.x86_64).
  • Kernel Mode Setting appears to have stopped working going from 2.6-32-431-29.2.el6.x86_64 to 2.6-32-504.el6.x86_64
  • The screen shows tearing and wobbling (its unusable) on kernel-2.6-32-504.el6.x86_64, unless nomodeset is used in Grub.conf. kernel-2.6-32-431-29.2.el6.x86_64 works OK without using nomodeset in the Grub.conf

Environment

  • Red Hat Enterprise Linux 6.6
  • kernel-2.6.32-504.el6.x86_64
  • Dell Optiplex All-In-One 9010

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