Reproducibility - always.<br />
Tried on: 3 machines.<br />
Type of machine: Dell Optiplex 390, x86_64, 8GB RAM.<br />
<br />
System hangs at system restart and shutdown. A hard shutdown is required everytime. It happened 3 times during CentOS installation, and everytime thereafter when restarting machine.<br />
<br />
Error is as follows: <br />
Fatal IO Error 11 (resource temporarily unavailable) on X server :9<br />
<br />
Statement just before this error:<br />
"Restarting system..."
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