hdparm is unable to do its work: hdparm -d1 -c3 -m16 /dev/hda says
"HDIO-SET-DMA: operation not permitted". And DMA is off, according to
hdparm /dev/hda
The obvious answer would be lack of support in the kernel. But:
linux-2.6.16.38 $ grep DMA .config
CONFIG_GENERIC_ISA_DMA=y
CONFIG_ISA_DMA_API=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_IDEDMA_FORCED is not set
CONFIG_IDEDMA_PCI_AUTO=y
# CONFIG_IDEDMA_ONLYDISK is not set
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_IDEDMA_IVB is not set
CONFIG_IDEDMA_AUTO=y
# CONFIG_SCSI_PDC_ADMA is not set
CONFIG_IEEE1394_SBP2_PHYS_DMA=y
So, what did I miss?
(It's not a hardware problem, because DMA is on when I boot Gentoo in
the same box.)
--
Jorge Almeida
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