Does Intel Sandy Bridge MB Sata support port multipliers?

I had a system with a sil 3132, and a PMP which worked fine.

I upgraded the system and was hoping to use onboard sata (it's a Sandy
Bridge lga1155).
When I plug my PMP into that, the other drives are not detected.

Where do I find the list of SATA drivers that support PMP.
Are newer intel MBs with onboard SATA supposed to work?

dmesg says:
ahci 0000:00:1f.2: version 3.0
ahci 0000:00:1f.2: PCI INT B -> GSI 20 (level, low) -> IRQ 20
ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x3f impl SATA mode
ahci 0000:00:1f.2: flags: 64bit ncq sntf pm led clo pio slum part ems apst 
ahci 0000:00:1f.2: setting latency timer to 64
scsi0 : ahci
scsi1 : ahci
(...)

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/