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Old 03-08-2009, 10:21 PM   #1
LQ Newbie
Registered: Mar 2009
Posts: 4

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Graphical glitching with ATI HD 4850

I'm trying to fix a problem on my box, which is running Slackware 12.2. I noticed a lot of screen tearing when moving windows and especially during video playback. The video card is an ATI HD 4850 using the xf86-video-radeonhd driver, I've tried fglrx but the problem persists. Here's my xorg.conf:
Section "ServerLayout"
	Identifier     " Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"

Section "Files"
	RgbPath      "/usr/share/X11/rgb"
	ModulePath   "/usr/lib/xorg/modules"
	FontPath     "/usr/share/fonts/TTF"
	FontPath     "/usr/share/fonts/OTF"
	FontPath     "/usr/share/fonts/Type1"
	FontPath     "/usr/share/fonts/misc"
	FontPath     "/usr/share/fonts/75dpi/:unscaled"

Section "Module"
	Load  "xtrap"
	Load  "extmod"
	Load  "glx"
	Load  "GLcore"
	Load  "dbe"
	Load  "dri"
	Load  "record"
	Load  "type1"
	Load  "freetype"

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
	Option       "XkbModel"  "pc101"
	Option       "XkbLayout"  "us"

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5 6 7"

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"

Section "Device"
        ### Available Driver options are:-
        ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
        ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
        ### [arg]: arg optional
        #Option     "NoAccel"            	# [<bool>]
        #Option     "AccelMethod"        	# [<str>]
        #Option     "offscreensize"      	# [<str>]
        #Option     "SWcursor"           	# [<bool>]
        #Option     "ignoreconnector"    	# [<str>]
        #Option     "forcereduced"       	# [<bool>]
        #Option     "forcedpi"           	# <i>
        #Option     "useconfiguredmonitor" 	# [<bool>]
        #Option     "HPD"                	# <str>
        #Option     "NoRandr"            	# [<bool>]
        #Option     "RROutputOrder"      	# [<str>]
        #Option     "DRI"                	# [<bool>]
        #Option     "TVMode"             	# [<str>]
        #Option     "ScaleType"          	# [<str>]
        #Option     "UseAtomBIOS"        	# [<bool>]
        #Option     "AtomBIOS"           	# [<str>]
        #Option     "UnverifiedFeatures" 	# [<bool>]
	Identifier  "Card0"
	Driver      "radeonhd"
	VendorName  "ATI Technologies Inc"
	BoardName   "Unknown Board"
	BusID       "PCI:1:0:0"

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	DefaultDepth 24
	SubSection "Display"
		Viewport   0 0
		Depth     1
	SubSection "Display"
		Viewport   0 0
		Depth     4
	SubSection "Display"
		Viewport   0 0
		Depth     8
	SubSection "Display"
		Viewport   0 0
		Depth     15
	SubSection "Display"
		Viewport   0 0
		Depth     16
	SubSection "Display"
		Viewport   0 0
		Depth     24
Any ideas on how to fix this?
Old 03-09-2009, 01:39 AM   #2
LQ Guru
Registered: Dec 2008
Location: Westgate-on-Sea, Kent, UK
Distribution: Debian Testing Amd64
Posts: 5,465

Rep: Reputation: Disabled
Hi Matt,
Are you satisfied that your "radeonhd" is the correct driver for your card? A lot of people (including) me use ATI cards on these forums and I haven't seen radeonhd before. I wonder about using "xf86-video-radeonhd driver" when your are using xorg and not xfree86. Have you tried xserver-xorg-video-radeonhd instead? That may be a better choice.
Old 03-09-2009, 04:12 PM   #3
LQ Newbie
Registered: Mar 2009
Posts: 4

Original Poster
Rep: Reputation: 0
"radeonhd"( is the driver that was set by the xorgsetup program on Slackware. The "radeon"( driver is supposed to support my card without video tearing, but X will not start at all when I set the driver to "ati" or "radeon"; it seems to only work with radeonhd and vesa.

EDIT: Nevermind, it seems that "radeon" doesn't actually support tear free video on R700 cards. I guess I'll just by a cheap Nvidia or older ATI card to use with Linux. Thanks for the help.

Last edited by Matt_K; 03-09-2009 at 04:16 PM.


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