Suspend resume with libata IDE disks disables DMA
Bug #121286 reported by
Steven Ellis
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned | ||
linux-source-2.6.20 (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: linux-image-
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.
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Here is some kernel output when DMA is working normally after a cold boot.