> [PATCH] pata_amd/pata_via: de-couple programming of PIO/MWDMA and UDMA timings
>
> * Don't program UDMA timings when programming PIO or MWDMA modes.
>
> This has also a nice side-effect of fixing regression added by commit
> 681c80b5d96076f447e8101ac4325c82d8dce508 ("libata: correct handling of
> SRST reset sequences") (->set_piomode method for PIO0 is called before
> ->cable_detect method which checks UDMA timings to get the cable type).
I'm not sure this helps as if the ACPI _GTF method is looking at the
flags and stuff but it has to be worth a try.
Works for me as a 2.6.24 band aid
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