asterisk users - Feb 2010 - Pri HDLC aborts and choppy audio when dialling into pri, caused by BIOS option ["CPU enhanced halt" c1e]

Hardware:
    Digium  TE110P REV.C and REV.D
    Gigabyte GA-965G-DS3 Bios F8b
 
cat /proc/cpuinfo
....
model name      : Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz
stepping        : 6
cpu MHz         : 2400.080
cache size      : 4096 KB
...
 
latest libpri, dahdi, asterisk as of tonight.
linux: debian lenny
 
After moving hardware around all slots, disabling all unused hardware with
no improvement finally disabled the Advanced Bios Option ["CPU enhanced
halt" c1e]
All choppy audio completely gone, no more HDLC aborts.
 
Enable  ["CPU enhanced halt" c1e] and it's all back. 100%
repeatable.
 
Could be related to more than just the above mentioned hardware.
 
Alec Davis
 
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