ACPI BATTERY on Windows 2000 SP4 of IBM ThinkPad 240X

[teetee]

After a clean install of windows2000, the system hangs when it starts up. Sometimes it hangs at the progress bar screen and sometimes it hangs at the grey login screen. I can stop this from happening by deleting or disabling the ACPI-compliant Battery device found in hardware manager. But I lose the ability to read the battery monitor when the device is not functional. I couldn't think of anything wrong except when I installed the windows 2000 I installed it with AC connected only(no battery).

I figured out I should probably post here to see if anyone had the similar problem before and possible solution before I wipe out the system and reinstall it with battery on.

teetee
PS. I just found out the reference posts
http://forum.thinkpads.com/viewtopic.php?t=1723
However, I really prefer to have ACPI function so that I can monitor the battery. Though my system hangs but it didn't show me BSOD. Linux(slackwre10.2) works fine without some intel-ACPI features but that's because there are some key ACPI codes written according to MS doc.

[Neil1]

I have 2 IBM 240X running on Windows 2000 sp4 and I have no problem what so ever with ACPI, does your 240 have the latest bios update.

Regards
Neil

[teetee]

Yes I do. It might be the hardware resource conflict. I just don't know how to observe/fix the route table for IRQ that kind of stuff between bios and win2000.