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Symptoms corrected by the latest BIOS update - ThinkPad T21

Version 1.00 KZET16WW

  • (New) Support for ThinkPad T21

Version 1.02 KZET18WW

  • (New) Adds a Lock BIOS settings menu to BIOS setup
  • (Fix) A network failure may occur after resuming from full-suspend mode with some network PC-cards on Microsoft Windows NT4 and OS/2.
  • (Fix) Some PCI video cards in docking station do not work after reboot with Ctrl+Alt+Del reset.
  • (Fix) Device Access indicator LED sometimes stays on after hibernation wakeup on Windows NT4.
  • (Fix) Access to CD-ROM in docking station becomes slow after resume from suspend on Microsoft Windows 98.
  • (New) Power Management Update - enhancement of CPU thermal controls designed.

Version 1.04 KZET22WW
CAUTION: for users with the Intel/Xircom Mini PCI combo cards:
This BIOS version will only work with Intel Boot Agent (IBA) 4.0 or later for Wake On Lan (WOL) based remote installations. If you plan to do remote installations with IBA versions prior to 4.0, then you must use a previous BIOS version to 1.03. Failure to do so may cause the ThinkPad system to hang.  

  • (New) Modified SMBIOS Type 3 to report AssetNumber in EEPROM User Asset Data under the "Asset Tag Number" field.
  • (Fix) Fn key features may not work after wakeup from hibernation while the ThinkPad is connected to a docking station without a CD-ROM drive in either the ThinkPad system or docking station Ultrabay 2000.
  • (Fix) Resuming from a screen off state requires pressing a key two times. (Microsoft Windows Me and Microsoft Windows 2000)
  • (Fix) A hard disk drive (HDD) password is requested after warm docking to a docking station which has a HDD adapter without a HDD in its Ultrabay 2000.
  • (Fix) Hang up occurs when suspend/resume is done on a ThinkPad with HDD adapter without a HDD in the Ultrabay 2000.
  • (Fix) ACPI compatible Linux hangs up at boot timing.
  • (Fix) System shutdown takes long time under Windows 98 after hot-remove from the docking station with a SuperDisk drive in the Ultrabay 2000.
  • (Fix) Flashes appears on CRT screen when opening ThinkPad Configuration in Windows NT 4.0.
  • (Fix) Some Matrox video cards do not work.
  • (Fix) POST 189 error.
  • (Fix) BIOS HDD off timer is still working on Windows Me/2000.
  • (Fix) Parallel floppy disk drive (FDD) is not detected after undock.
  • (Fix) Reboot from BIOS-call causes the to system hang.
  • (Fix) System can not boot from a HDD with partition ID of n5h. (n is 1 or greater)
  • (New) D0-stepping Pentium III support
  • (New) BIOS Copyright text is changed
  • (Fix) Normal power-on without AC power with 3COM Mini-PCI installed may invoke Wake On LAN (WOL) mode.
  • (Fix) RI resume from PC-Card modem can not be disabled on Windows 98.

Version 1.05 KZET23WW

  • (New) Add option to disable SuperDisk Boot in the configuration menu to allow SuperDisk drive to be assigned a fixed letter.
  • (Fix) Power-on password function problem.
  • (Fix) Wrong spelling in BIOS setup
  • (Fix) Cannot boot from CD-ROM when CD-ROM follows network boot in boot sequence.
  • (Fix) System may hang when using Suspend/Resume after attaching 2nd HDD with HDD password.
  • (Fix) PCI power management is disabled after suspend/resume on Windows Me and Windows 2000.
  • (Fix) PC card is sometimes configured abnormally during POST.
  • (Fix) System may restart automatically when wake up from hibernation on Microsoft Windows 95.
  • (Fix) DMA channel of ECP parallel port may not be available on Windows Me and Windows 2000.

Version 1.06 KZET25WW

  • (New) Add F1 prompt message display disable selection.
  • (Fix) Screen is not displayed to external display after undocking under Windows 2000.
  • (Fix) Wording of PCI IRQ setting in BIOS setup is misleading.
  • (Fix) Screen is blackout even if LID open after boot with LID close.
  • (Fix) Save Changes and then power on/off can not set keep the setting.
  • (Fix) If 3.3V 16bit PC card is attached, POST takes 3 seconds longer.
  • (Fix) Device attached to UltraPort does not work after reboot under Windows 2000.
  • (Fix) 84-key is selected on cold boot under Windows NT4.0.

Version 1.07 KZET26WW

  • (Fix) Sometimes keyboard becomes unresponsive after restart.
  • (Fix) Screen is not displayed to external CRT after warm docking.

Version 1.08 KZET27WW

  • (New) Improved support for the UltraPort
  • (Fix) Distortion appear with external monitor at 1600x1200 resolution.
  • (Fix) FDD media which is inserted in the docking station ultra bay 2000 may be broken when system enter suspend.

Version 1.10 KZET29WW

  • (Fix) Power state of UltraPort devices from IBM after wakeup is always OFF.
  • (Fix) 0175 POST error occur.
  • (Fix) If ECP mode is selected, the parallel port does not work after resume from standby state on Windows Me and Windows 2000.
  • (Fix) PC-Doctor 3D engine test cause system hang.
  • (Fix) If the invalid battery is attached, execution of battery information utility cause system hang.

Version 1.11 - KZET30WW

  • (New) Microsoft Windows XP support
  • (New) Improved resume speed on Windows Me and Windows 2000.
  • (Fix) If Alert On LAN 2 is enabled, sometimes file transfer through network fails.

Version 1.12 - KZET30WW

  • (New) Improved thermal control measures

Version 1.13 - KZET31WW

  • (New) Enhance BIOS image data integrity at flash update.
  • (New) 2002 is added to BIOS Copyright text.
  • (New) Improved CPU thermal control.
  • (Fix) Netfinity utility does not work on OS/2.
  • (Fix) Some HDD partition information causes boot failure.
  • (Fix) OS install using Remote Deployment Manager (RDM) may cause system hang.
  • (Fix) Password is required twice if user presses the F1 key when the password prompt appears.
  • (Fix) If system is turned off immediately during first power on process, it may cause hang at next power on.
  • (Fix) Dock/undock operation on Windows 98 may cause system freeze if DVD/CD-RW combo device is installed in docking station.
  • (Fix) If hibernation file structure is special, hibernation wakeup may cause system hang.
  • (Fix) System did not wait long enough for the command that stops the HDD spindle motor during a system power off.
  • (Fix) If supervisor password is enabled, disabling Legacy Floppy Devices in BIOS setup startup menu does not work properly.

Version 1.14 - KZET32WW

  • (Fix) Hibernation wakeup may cause the system to hang if the supervisor password is installed and the BIOS update diskette is inserted.
  • (Fix) POST 175 error occurs if the system is powered off during POST.
  • (Fix) Password prompt appears if the user performs a reboot after suspend/resume on ACPI operating system.
  • (Fix) POST hang may occur if CMOS value is incorrect.

Version 1.15 - KZET33WW

  • (New) Enhancement of the password security feature.

Affected Configurations
Any ThinkPad T21 system

Click here to download the latest BIOS update in diskette format.
Click here to download the latest BIOS update in a non-diskette format.

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Document ID : HT036460
Legacy Document ID : DSHY-3YVKSE
Last Updated :
Copyright © Lenovo 2013, all rights reserved
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