Laggy 2D performance with fglrx

[mintcoffee]

Hi all,

I'm currently running Kubuntu fiesty with fglrx 8.38.7. I noticed that my 2d windows are a little laggy, in that dragging windows leaves a 'ghost', and konqueror / dolphin have a slow refresh rate (I can see 3 refreshes in the span of 2 seconds or so).

I ran Xgl + beryl a while back and these problems went away. I'm just curious.. is the lag normal for standard Xorg?

Here is the relevant section from my xorg.conf

Section "Device"
	Identifier  "Generic Video Card"
	Driver      "fglrx"
	Option	    "XaaNoOffscreenPixmaps"
	Option	    "VideoOverlay" "on"
	Option	    "OpenGLOverlay" "off"
	Option	    "DesktopSetup" "horizontal"
	Option	    "TexturedVideo" "on"
	Option	    "EnablePrivateBackZ" "yes" #Enable 3d support <= May Not Work
    Option      "UseFastTLS" "0"  #for wine?
    Option      "ForceGenericCPU" "no" 
    Option "mtrr"                       "off" # disable DRI mtrr mapper, driver has its own code for mtrr
	Option	    "EnableMonitor" "LVDS"
	Option	    "PairModes" "1920x1200+1280x1024,1680x1050+1920x1200"
	BusID       "PCI:1:0:0"
EndSection

Section "Extensions"
	Option	    "Composite" "0"
EndSection

Any help would be appreciated!

[yoshi314]

maybe disabling composite is different. not by setting it to 0 but to "Disable" or something. don't remember, it was somewhere on forums.

[mintcoffee]

Thanks for the suggestion. I tried that, and it doesn't help. The strange thing is, if I use XGL+Composite Manager, then the 2D refresh is gone. However, using standard X.org, it's present.

Maybe it's just the fglrx driver.

[mile]

not maybe, it is fglrx fault

latest "ok" driver is 8.35.5

there are howtos on the net how to patch and install this driver for feisty

[edvin]

this might not be the problem, but check if:

glxinfo | grep "direct"

gives you a "Yes"

If not, maybe you need to restore the proper symlinks in /usr/lib(64) for libGL.so

I didn't have the "ghost effect" you're seeing, but apparently my symlinks would get butchered sometimes (e.g. after hibernating or just restarting), leading to sluggish 2d drawing.

[damentz]

Section "Device"
	Identifier  "Generic Video Card"
	Driver      "fglrx"
	Option	    "XAANoOffscreenPixmaps"
	Option	    "VideoOverlay" "on"
	Option	    "OpenGLOverlay" "off"
#	BusID       "PCI:1:0:0" #if you have one card, it will be auto detected
EndSection

Section "Extensions"
	Option	    "Composite" "0"
EndSection

Use this. You also used the wrong case for XAANoOffscreenPixmaps, the options are case sensitive.

fglrx actually has no real options to enhance performance.