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Windows 7: How to Prevent the Mouse from Waking your PC
showrev -p | awk -F- '{hold0=$0; hold=$1; while (getline > 0) { if (hold!=$1) {print hold0; hold0=$0} if (hold=$1) hold0=$0 } }'
Changing the 'awk' to 'nawk' resolved the issue.
showrev -p | nawk -F- '{hold0=$0; hold=$1; while (getline > 0) { if (hold!=$1) {print hold0; hold0=$0} if (hold=$1) hold0=$0 } }'
Thanks for the tip.