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Thread: Performance tweaks for radeon driver?

  1. #1
    Join Date
    May 2008
    Beans
    64

    Performance tweaks for radeon driver?

    Hi there. I've got a Gateway MT6452 laptop with an ATI Radeon Xpress 1150. I'm running Ubuntu Intrepid. Fglrx really stinks, for various reasons (video on compiz, zsnes, others), so I use the open source radeon driver. I'm trying to tweak it for extra performance.

    Here's my xorg.conf, device section:

    Code:
    Section "Device"
    	Identifier	"Configured Video Device"
    	Driver		"radeon"
    	BusID		"PCI:1:5:0"
    	Option		"GARTSize"		"32"
    	Option		"AccelMethod"		"EXA"
    	Option		"EXANoOffscreenPixmaps"	"on"
    	Option		"ColorTiling"		"on"
    	Option		"BackingStore"		"on"
    	Option		"EnablePageFlip"	"on"
    	Option		"RenderAccel"		"on"
    	Option		"SubPixelOrder"		"NONE"
    EndSection
    I've also installed DRIconf, but I can't make sense of most of the options. I've only disabled vsync there.

    Is there anything else I can do to improve performance? Also, how do I add extra resolutions? Adding display subsections in the Screen section doesn't seem to work for Intrepid.

  2. #2
    Join Date
    May 2008
    Beans
    2,525

    Re: Performance tweaks for radeon driver?

    While not specifically for the graphics driver if you just want to do some tweaking for performance... I have done these on both my Hardy desktop and Intrepid laptop machines. Just use what you're sure you're comfortable with as I didn't do them all but most of them. Here you go.
    http://forumubuntusoftware.info/view...63c45d986485bb

    Just be sure not to disable anything laptop specific and you should be alright however the usual disclaimer applies I will not be responsible if you mess up.

    Ultimate Edition Links

  3. #3
    Join Date
    Dec 2006
    Beans
    Hidden!
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Performance tweaks for radeon driver?

    You might want to try these drivers >>
    https://launchpad.net/~tormodvolden/+archive
    Just use the .deb files by selecting one of the three links near the top of the page.

    More info >>
    http://www.phoronix.com/scan.php?pag...item&px=NjkwNQ

    Greatly increased acceleration, no tearing, with full screen video still falling just a tad short, but way better than any original ATI driver.

  4. #4
    Join Date
    May 2008
    Beans
    64

    Re: Performance tweaks for radeon driver?

    Ah, these are great drivers indeed! They've given me a little bit of a performance increase. I've bookmarked his ATI driver folder. Thank you!

    What I really want to know, though, is about additional tweaks I can put into xorg.conf. Like, is it safe to use AGPFastWrites and AGPMode with Xpress IGPs? (I'm guessing not, since it's an IGP.) Should I increase my GARTSize? Any other options that might help? I haven't toucheed my xorg.conf since starting this thread.

    DRIconf, too. What's the fastest TCL mode? The best method for limiting rendering latency? What size should I make the command buffer? Actually, I'd like to know about every option there. The only one I know is the one for Vsync (which is forced off right now).
    Last edited by Twilight in Zero; December 16th, 2008 at 10:55 PM.

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