Gone through all the HOWTO's, but Compiz _slow_

[dotancohen]

I have a Dell Inspiron 6400 / E1505 with the ATI X1400 video card and 1680x1050 resolution widescreen LCD. With the ATI driver I was able to run Beryl at the native resolution with Kubuntu 7.04 (KDE desktop). Now that I have upgraded to Gutsy, Compiz is very slow and has no graphical effects. Even before I run compiz, the desktop is very slugish, ever since I installed xserver-xgl.

Here is my xorg.conf:

# Xorg configuration created by system-config-display

Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Synaptics" "CorePointer"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
Option "SHMConfig" "on"
EndSection

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor0"
ModelName "LCD Panel 1680x1050"
### Comment all HorizSync and VertSync values to use DDC:
HorizSync 31.5 - 90.0
VertRefresh 59.9 - 60.1
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "fglrx"
EndSection

Section "Module"
load "GLcore"
load "glx"
load "dri"
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection

Section "Extensions"
Option "Composite" "Disable" # this makes DRI work with fglrx
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1680x1050"
EndSubSection
EndSection


This is the same xorg.conf as I had in Kubuntu 7.04. I'm glad that I saved it as without it I could not enable the native 1680x1050 resolution.

This is the output of compiz in Konsole:
gutsy@gutsy-laptop:~$ compiz
Checking for Xgl: present.
Checking for nVidia: not present.
Checking for Xgl: present.
Starting kde-window-decorator
/usr/bin/compiz.real (core) - Fatal: GLX_EXT_texture_from_pixmap is missing
/usr/bin/compiz.real (core) - Error: Failed to manage screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :1.0

I see that it's looking for nVidia specific configuration. I have an ATI X1400. What must I configure?

Thanks in advance.

[dotancohen]

Update: fglrxinfo crashes X.

I've gotten a bit further with XGL and now this is the output of compiz:

gutsy@gutsy-laptop:~$ compiz
Checking for Xgl: present.
Checking for nVidia: not present.
Checking for Xgl: present.
Starting emerald
/usr/bin/compiz.real (core) - Fatal: GLX_EXT_texture_from_pixmap is missing
/usr/bin/compiz.real (core) - Error: Failed to manage screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :1.0


Also, I can move windows with ALT-left drag so I know that compiz is running. But it is unbelievably sluggish.