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Edgar Sanchez wrote: |
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> hi: |
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> i have an acer 4152lmi laptop,& i cannot activate de dma |
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> |
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> hdparm -d1 /dev/hdc |
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> |
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> /dev/hdc: |
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> setting using_dma to 1 (on) |
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> HDIO_SET_DMA failed: Operation not permitted |
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> using_dma = 0 (off) |
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> Can anybody help me? |
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> thx |
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|
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Make sure you compiled your kernel with DMA Support |
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Device Drivers ---> |
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<*> ATA/ATAPI/MFM/RLL support |
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... |
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[*] PCI IDE chipset support |
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... |
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[*] Generic PCI bus-master DMA support |
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... |
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[*] Use PCI DMA by default when available |
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... |
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Also know your laptop. There are some other options under "ATA/ATAPI/MFM/RLL |
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support" specific to hardware. You may have to select the appropriate so you can |
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use DMA. For example my laptop is a Compaq Presario r3000 model and the |
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motherboard is a nVidia nForce3, so I selected in "AMD and nVidia IDE support". |
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|
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I hope I'm not wrong, and I hope this helps. |
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|
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-- |
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Luis Ortiz |
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-- |
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