Public bug reported:

Binary package hint: linux-image-2.6.20-15-generic

System has a VIA onboard IDE controller that still shows up as hda-hdd

It also has a promise IDE controller that libata now maps as sda-sdd via
pata_pdc2027x.ko.

Normal power on DMA is enabled on all disks.

Suspend to RAM and then resume results in DMA disabled on the libata
devices, but still working on the VIA IDE devices.

** Affects: linux-source-2.6.20 (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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Suspend resume with libata IDE disks disables DMA
https://bugs.launchpad.net/bugs/121286
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