kernel update 3.x to 3.6.2 stopped system boot from ide drive

[Jonathan183]

I updated my system today which included a kernel upgrade from

Linux Desktop-PC 3.5.6-1-ARCH #1 SMP PREEMPT Sun Oct 7 19:33:50 CEST 2012 i686 GNU/Linu

to

Linux Desktop-PC 3.6.2-1-ARCH #1 SMP PREEMPT Sat Oct 13 07:19:40 CEST 2012 i686 GNU/Linux

After a reboot I got error messages about being unable to read the hard drive ... after some searching I came across this thread indicating a problem with pata_acpi.

I checked when dropped to a recovery shell the output of lspci -vnn and found that relevant output for my ide controller had changed from

00:04.0 IDE interface [0101]: ULi Electronics Inc. M5229 IDE [10b9:5229] (rev c4) (prog-if fa)
        Subsystem: ASUSTeK Computer Inc. A7A266 Motherboard IDE [1043:8053]
        Flags: bus master, medium devsel, latency 32, IRQ 255
        [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
        [virtual] Memory at 000003f0 (type 3, non-prefetchable)
        [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
        [virtual] Memory at 00000370 (type 3, non-prefetchable)
        I/O ports at d400 [size=16]
        Capabilities: <access denied>
        Kernel driver in use: pata_ali

to using kernel driver pata_acpi

Adding modprobe.blacklist=pata_acpi to the kernel boot parameters fixes the issue for me

thought I'd share my solution incase it helps others with similar issues ...