GDM session does not start

[SebastianIvan]

Dapper flight 5-> every day updated on a PIII dual CPU:
Linux venus 2.6.15-20-686 #1 SMP PREEMPT Tue Apr 4
18:37:00 UTC 2006 i686 GNU/Linux

lspci:
0000:01:00.0 ffff: S3 Inc. Savage 4 (rev ff)

I can boot in rescue mode and start gdm
in normal mode X will not start
all other services are started including ssh

I can attach the logs and xorg.conf

This is a critical/major bug

[SebastianIvan (sebastian-ivan-ubuntu)]

venus@venus:~$ ps aux | grep X
root 4439 96.2 1.9 11164 5060 tty7 Rs+ 17:12 1:44 /usr/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7

from /var/log/Xorg.0.log :

(**) Option "Device" "/dev/wacom"
(EE) xf86OpenSerial: Cannot open device /dev/wacom
        No such file or directory.
Error opening /dev/wacom : No such file or directory
(EE) xf86OpenSerial: Cannot open device /dev/wacom
        No such file or directory.
Error opening /dev/wacom : No such file or directory
(**) Option "Device" "/dev/wacom"
(EE) xf86OpenSerial: Cannot open device /dev/wacom
        No such file or directory.
Error opening /dev/wacom : No such file or directory
(EE) xf86OpenSerial: Cannot open device /dev/wacom
        No such file or directory.
Error opening /dev/wacom : No such file or directory
(**) Option "Device" "/dev/wacom"
(EE) xf86OpenSerial: Cannot open device /dev/wacom
        No such file or directory.
Error opening /dev/wacom : No such file or directory
(EE) xf86OpenSerial: Cannot open device /dev/wacom
        No such file or directory.
Error opening /dev/wacom : No such file or directory
(II) Configured Mouse: ps2EnableDataReporting: succeeded

[SebastianIvan (sebastian-ivan-ubuntu)]

This is a duplicate of
Bug #33504:
Server failure with S3 86c764/765 [Trio32/64/64V+]