Linux - SoftwareThis forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
I tried to check my hdparm setting on DVD, and indeed it is set to 0, so I would like to turn it on to improve my dvd performance during playback, instead, I get this message:
I issued this command while logged in as root----- hdparm -d 1 /dev/hdc
/dev/hdc:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
That's the hdparm command I have setup in my rc.local script. You might need to tweak it a bit for that drive (like the udma) so that it will work, but that gave me a huge difference in my HARDdrive performance.
I had this problem last night, it is something to do with Redhat messing up dma support as far as I know..
I do have a line that you can do that fixes it, I can't remember it right now.. but I do have the line noted at home. If you still haven't gotten the problem fixed I will post it later today..
I'm having the same problem- I get that error: HDIO_SET_DMA failed: Operation not permitted. I want to set the dma for my hard drive, but it never lets me. I have a Maxtor 40 gig 7200 RPM which is fairly new and fast. I tried setting something in the bios called dma but it still won't work. Any other ideas?
You, you type that entire line on the command prompt. I don't fully understand what it does, but I think it inserts that line into the modules.conf, thats why I say type that entire line rather than copy anything into modules.conf.
Just open up the terminal as root and type that line.
Are you still trying to run the hdparm command? You don't have too. Once you have entered that line, restart the machine and it is done. My DVD playback worked fine after I did it.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.