Lubuntu for powerpc 14.04 on G5 DP 2.7ghz - only detecting one CPU

Lubuntu 14.04 64bit Desktop installed and updated but it is only showing one CPU in the system profiler also, before I ran the updates the CPU speed was 2700mhz which is correct. After the updates it was 2000Mhz.

PowerMac 7,3 DP 2.7Ghz, 8GB,

Thanks for any help