Lenovo L420/L412 models: After logging in through WinMagic V5 preboot, the power adapter detection icon disappears from system tray.
Issue description:
On Lenovo L420 or L412 models, if the user logs in through the WinMagic PBL (V5 Pre-Boot on a NON-UEFI device) then the user will notice the power adapter detection system tray icon will have disappeared from the Windows system tray. This issue might also occur on certain other Lenovo models.
Affected environment: Windows 7 (x64 & x86)
Workaround:
Use the V4 boot-loader. (if you don’t require PBConnex or setting related to new pre-boot)
If you want to use V5 (PBL) then set the following boot parameter (Boot configuration settings | Advanced Options | Boot parameters)
Add acpi=off into the boot parameter string area.
Note: Use of Ymode =04 or Ymode=4- do not have any impact on this, and are not solutions for this issue.