Messages in this thread | | | Date | Fri, 16 Feb 2007 17:18:38 -0600 | From | Robert Hancock <> | Subject | Re: pata_amd dropping to PIO on resume |
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Tobias Diedrich wrote: > Possibly a known issue: > > After resume pata_amd drops from UDMA/33 to PIO on my system. > Reloading the module puts both attached optical drives (master and > slave) back to UDMA/33. > > AFAICS "simplex DMA is claimed by other device, disabling DMA" seems > to be causing it to drop to PIO (but only after a suspend/resume > cycle, not on boot or module load). > > Burning a DVD with 6x speed using PIO makes heavy use of burnproof > and makes the whole system quite sluggish. :)
Yes, the fact that it's going into simplex mode is the problem, it wasn't in simplex to start with. It looks like pata_amd does an ata_pci_clear_simplex only for certain chip models, maybe this model needs it as well?
-- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/
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