Comment 6 for bug 817017

I think I managed to got it working:

dmesg|grep -i ahci
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.38.8-dg root=UUID=a62afe8f-9e3c-445c-bfdb-4e1c1bc82232 ro crashkernel=384M-2G:64M,2G-:128M i5s_3400s_force_ahci=1 quiet splash vt.handoff=7
[ 0.671966] [i5s_3400s ** FIXUP] SATA controller mode: NON AHCI (0x3c00)
[ 0.671967] [i5s_3400s ** FIXUP] Putting SATA controller into AHCI (0x3c60)
[ 1.294111] ahci 0000:00:1f.2: version 3.0
[ 1.294138] ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19
[ 1.294198] ahci 0000:00:1f.2: irq 41 for MSI/MSI-X
[ 1.294271] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 4 ports 3 Gbps 0x3 impl SATA mode
[ 1.294275] ahci 0000:00:1f.2: flags: 64bit ncq sntf pm led clo pio slum part ems apst
[ 1.294280] ahci 0000:00:1f.2: setting latency timer to 64
[ 1.300513] scsi0 : ahci
[ 1.300650] scsi1 : ahci
[ 1.300730] scsi2 : ahci
[ 1.300801] scsi3 : ahci

Can you confirm is using AHCI? Suspend works.