Me, too!

I'm running an ATI HD 3450, with Xinerama enabled and apparently working properly.
HOWEVER,  any attempt to log off, or to change users by either the user switcher or
little-green-man menu, result in black screens and hang. Hard reset is the only
way out: ctrl-alt-bksp doesn't fix it. After I file this, I'm going to see if restarting
gdm from an  ssh, started BEFORE the logoff, helps at all.

I'm running Xinerama, and ATI accelerated drivers are marked as "in-use", but DISABLED,
by the System/Admin/Hardware Drivers page. I'm trying to run GNOME, across the board,
for all users, but am not sure how to force that. 

The drivers were installed by envy-gt a few minutes ago. All Ubuntu-based updates
are installed, to the best of my knowledge.

The various patches described by Ilya, etc., appear to have already been made by 
Ubuntu system upgrades. The Stefan patch appears to have already been made, too,
but I'm not sure about any GDM patches. I am running GDM...

This is getting on my nerves, because EVERY TIME I dare to hit the system upgrade
button, X goes off the air for days or more.  I just replaced my NVIDIA card with an ATI
card, in the hope that it would be more house-broken, but instead, it just looks to
be also-broken.

Robert

-------------------------------------


# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg
#Section "Extensions"
#       Option	    "Composite" "Enable"
# EndSection

Section "Screen"
	Identifier	"aticonfig-Screen[0]-0"
	Device		"aticonfig-Device[0]-0"
	Monitor		"aticonfig-Monitor[0]-0"
	SubSection "Display"
		Viewport	0	0
		Depth	24
	EndSubSection
	Defaultdepth	24
EndSection

Section "Screen"
	Identifier	"aticonfig-Screen[0]-1"
	Device		"aticonfig-Device[0]-1"
	Monitor		"aticonfig-Monitor[0]-1"
	SubSection "Display"
		Viewport	0	0
		Depth	24
	EndSubSection
	Defaultdepth	24
EndSection

Section "Device"
	Identifier	"aticonfig-Device[0]-0"
	Driver		"fglrx"
	Option		"DesktopSetup"	"horizontal"
	Option		"VideoOverlay"	"on"
	Option		"OpenGLOverlay"	"off"
	Busid		"PCI:3:0:0"
EndSection

Section "Device"
	Identifier	"aticonfig-Device[0]-1"
	Driver		"fglrx"
	Busid		"PCI:3:0:0"
	Screen	1
	Option		"VideoOverlay"	"on"
	Option		"OpenGLOverlay"	"off"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
  screen 0 "aticonfig-Screen[0]-0" 0 0
  screen "aticonfig-Screen[0]-1" rightof "aticonfig-Screen[0]-0"
EndSection

Section "Module"
	Load		"glx"
EndSection

Section "Monitor"
	Identifier	"aticonfig-Monitor[0]-0"
	Option		"VendorName"	"ATI Proprietary Driver"
	Option		"ModelName"	"Generic Autodetecting Monitor"
	Option		"DPMS"	"true"
EndSection

Section "Monitor"
	Identifier	"aticonfig-Monitor[0]-1"
	Option		"VendorName"	"ATI Proprietary Driver"
	Option		"ModelName"	"Generic Autodetecting Monitor"
	Option		"DPMS"	"true"
EndSection

Section "ServerFlags"
	Option		"Xinerama"	"true"
	Option		"Clone"	"off"
EndSection

Section "Extensions"
	Option		"Composite"	"Enable"
EndSection