On Friday, 28 July 2006 22:36, Stefán István wrote: > Hello! > I'm not able to activate dma mode for cdrom drive in my laptop. > # hdparm -d1 /dev/hdd > > /dev/hdd: > setting using_dma to 1 (on) > HDIO_SET_DMA failed: Operation not permitted > using_dma = 0 (off) > > [snip] > > I think the problem is that there is no driver for this chipset compiled > into the kernel. But I don't know which driver should be compiled into. I > tried Intel PIIXn but it didn't help. > > Thanks for the help in advance, > István
You will need to set CONFIG_IDE=n, enable SCSI cdrom support (CONFIG_BLK_DEV_SR) and enable the Intel PIIX sata driver (CONFIG_SCSI_ATA_PIIX). DMA should then work perfectly fine. However one side effect is that your cdrom drive will become /dev/sr0, although I guess this can be fixed with a udev rule. -- Raymond Lewis Rebbeck -- gentoo-user@gentoo.org mailing list
