Messages in this thread | | | Date | Wed, 27 Jun 2001 10:59:23 -0700 (PDT) | From | "Jeffrey W. Baker" <> | Subject | Re: How to change DVD-ROM speed? |
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On Wed, 27 Jun 2001, Jens Axboe wrote:
> On Wed, Jun 27 2001, Jeffrey W. Baker wrote: > > I am trying to change the spin rate of my IDE DVD-ROM drive. My system is > > an Apple PowerBook G4, and I am using kernel 2.4. I want the drive to > > spin at 1X when I watch movies. Currently, it spins at its highest speed, > > which is very loud and a large power load. > > > > /proc/sys/dev/cdrom/info indicates that the speed of the drive can be > > changed. I use hdparm -E 1 /dev/dvd to attempt to set the speed, and it > > reports success. However, the drive continues to spin at its highest > > speed. > > Linux still uses the old-style SET_SPEED command, which is probably not > supported correctly by your newer drive. Just checking, I see latest Mt > Fuji only lists it for CD-RW. For DVD, we're supposed to do > SET_STREAMING to specify such requirements. > > Feel free to implement it :-)
I will be happy to :) Should I hang conditional code off the existing ioctl (CDROM_SELECT_SPEED, ide_cdrom_select_speed) or use a new one?
Best, Jeffrey
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