No DMA :(

by Kushal Das

I have “HL-DT-ST DVDRAM GMA-4082N” in my laptop. Few days back I burned first DVD, and it took me more than 1.5 hour :(

So, figured out that DMA is not enabled for my /dev/hdc. hdparm gives: 

[root@kdlappy ~]# hdparm -v /dev/hdc/dev/hdc:



 IO_support   =  0 (default 16-bit)



 unmaskirq    =  0 (off)



 using_dma    =  0 (off)



 keepsettings =  0 (off)



 readonly     =  0 (off)



 readahead    = 256 (on)



 HDIO_GETGEO failed: Inappropriate ioctl for device
Tried to enable it by: 
hdparm -d1 /dev/hdc/dev/hdc:



 setting using_dma to 1 (on)



 HDIO_SET_DMA failed: Operation not permitted



 using_dma    =  0 (off)
Tried to compile the kernel myself, enabled almost everything under “ATA/ATAPI/MFM/RLL support” in Device Driver area, no good luck. My current kernel is 2.6.19-1.2911.6.5.fc6 Can anyone help me to enable DMA ?

Oh, and hdparm -i gives 

[root@kdlappy ~]# hdparm -i /dev/hdc/dev/hdc:



Model=HL-DT-ST DVDRAM GMA-4082N, FwRev=HA01, SerialNo=M00684E5137



 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }



 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0



 BuffType=unknown, BuffSize=0kB, MaxMultSect=0



 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0



 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}



 PIO modes:  pio0 pio1 pio2 pio3 pio4



 DMA modes:  mdma0 mdma1 mdma2



 UDMA modes: udma0 udma1 *udma2



 AdvancedPM=no



 Drive conforms to: ATA/ATAPI-5 T13 1321D revision 3:  ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5



    

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