Description:
Almost every time I startup arch, when its time for kdm to run, the screen gets black as xorg is running, but it return to the terminal login screen. There I have to do sudo /etc/rc.d/kdm restart;exit and kdm starts normally.
This happens to me since an update of xorg-server (1.7.3.901-1 -> 1.7.3.902-1) , kernel26 (2.6.31.6-1 -> 2.6.32.2-2) and nvidia (190.42-2 -> 190.53-1).
My architecture is x86_64.

Additional info:
* package version(s)
* config and/or log files etc.



My rc.conf daemons list is:
DAEMONS=(syslog-ng hal alsa @wicd @crond @smartd @bluetooth @sshd @avahi-daemon @dnsmasq @httpd @mysqld @sensors @noip @laptop-mode kdm)



Xorg.0.log do not inform of any error.
$ cat /var/log/Xorg.0.log|grep "(EE)"
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.



/var/log/kdm.log
X.Org X Server 1.7.3.902 (1.7.4 RC 2)
Release Date: 2009-12-26
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.32-ARCH x86_64
Current Operating System: Linux bonaparte 2.6.32-ARCH #1 SMP PREEMPT Sat Dec 26 09:02:58 CET 2009 x86_64
Kernel command line: root=/dev/disk/by-uuid/a60ed17f-9bba-406b-b28f-0c1dc914c9a0 ro vga=0x361
Build Date: 26 December 2009 02:34:45PM

Current version of pixman: 0.16.4
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Jan 6 12:28:07 2010
(==) Using config file: "/etc/X11/xorg.conf"

This is a pre-release version of the X server from The X.Org Foundation.
It is not supported in any way.
Bugs may be filed in the bugzilla at http://bugs.freedesktop.org/.
Select the "xorg" product for bugs you find in this release.
Before reporting bugs in pre-release versions please check the
latest version in the X.Org Foundation git repository.
See http://wiki.x.org/wiki/GitPage for git access instructions.

X.Org X Server 1.7.3.902 (1.7.4 RC 2)
Release Date: 2009-12-26
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.32-ARCH x86_64
Current Operating System: Linux bonaparte 2.6.32-ARCH #1 SMP PREEMPT Sat Dec 26 09:02:58 CET 2009 x86_64
Kernel command line: root=/dev/disk/by-uuid/a60ed17f-9bba-406b-b28f-0c1dc914c9a0 ro vga=0x361
Build Date: 26 December 2009 02:34:45PM

Current version of pixman: 0.16.4
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Jan 6 12:28:45 2010
(==) Using config file: "/etc/X11/xorg.conf"
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server


/etc/X11/xorg.conf
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder58) Tue Oct 20 21:25:04 PDT 2009


Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"

# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "NoLogo" "True"
SubSection "Display"
Depth 24
EndSubSection
EndSection

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