help: i can't reboot linux

["cmd.exe" <cmd.exe@163.com>]

hello:

i configure a very small kernel, compile it and install,
when i reboot, it stop after print 
Rebooting system...

i don't know what was missing from the kernel, can any body
help me?

linux kernel: 2.6.9
machine: IBM T23 laptop

lspci:

0000:00:00.0 Host bridge: Intel Corp. 82830 830 Chipset Host Bridge (rev
04)
0000:00:01.0 PCI bridge: Intel Corp. 82830 830 Chipset AGP Bridge (rev
04)
0000:00:1d.0 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #1) (rev
02)
0000:00:1d.1 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #2) (rev
02)
0000:00:1d.2 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #3) (rev
02)
0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 42)
0000:00:1f.0 ISA bridge: Intel Corp. 82801CAM ISA Bridge (LPC) (rev 02)
0000:00:1f.1 IDE interface: Intel Corp. 82801CAM IDE U100 (rev 02)
0000:00:1f.3 SMBus: Intel Corp. 82801CA/CAM SMBus Controller (rev 02)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97
Audio Controller (rev 02)
0000:01:00.0 VGA compatible controller: S3 Inc. SuperSavage IX/C SDR
(rev 05)
0000:02:00.0 CardBus bridge: Texas Instruments PCI1420
0000:02:00.1 CardBus bridge: Texas Instruments PCI1420
0000:02:02.0 Communication controller: Lucent Microelectronics WinModem
56k (rev 01)
0000:02:08.0 Ethernet controller: Intel Corp. 82801CAM (ICH3) PRO/100 VE
(LOM) Ethernet Controller (rev 42)