Maybe some information, that helps :
B2001230 means :
A problem occurred during the IPL of a partition.
The partition ID is characters 3 and 4 of the B2xx reference code in word 1 of the SRC (in hexadecimal format). If characters 3 and 4 are both zero, then the partition ID is in extended word one as LP=xxx (in decimal format).
This is a partitioning configuration problem. The partition is lacking the necessary resources to IPL.
This error might occur when you shut down a partition that is set to automatically IPL and then turn the managed system off and back on. When the partition automatically IPLs, it uses the resources specified in PHYP NVRAM, and this error occurs when the server does not find the exact resources specified in NVRAM. The solution is to activate the partition by using the partition profile on the HMC. The HMC applies the values in the profile to NVRAM. When the partition IPLs, it uses the resources specified in the profile.
Ah, I have been thinking about this. What has probably been happening for me, is that I have shutdown the system using ASMI interface, and when I manually start the system the VIOS partition that is set to autostart is reporting this message, and then restarting again - perhaps reading the default profile by itself.
My experience has never been that activation stopped, only that the partion activates a second time - which is behavior I see fairly often when switching to/from native AIX (whole system) and VIOS (IVM) modes by changing the boot disk.
In short, the key part of the explanation is:
it uses the resources specified in PHYP NVRAM, and this error occurs when the server does not find the exact resources specified