Gurgelmeyer Posted December 16, 2005 Share Posted December 16, 2005 Hi I recently digged into this, and this might be the answer: the only hotfix included in the MSURP1 which requires an updated HALMACPI.DLL is the KB835730 fix. The KB article also mentions P4 HT and "the C3 power-saving state", so I borrowed a P4 laptop with HT and tried all post-sp4 versions of HALMACPI.DLL. Version 5.0.2195.6988 mentioned in the KB artivle and all later versions seemed to have this problem. Second time I tested I modified the registry after installing the KB835730 fix as described in the KB. That certainly made a difference with all versions of this file - even with the MSURP1.The registry change I'm referring to is this• Edit the registry Add a DWORD value named 14140000FFFFFFFF that has a value of 00000010 to the following registry setting: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\HALMaybe MS forgot this setting in the URP1 (it's not there - I checked) ? Or maybe it only works with Dell hardware? Dono Best regards,Gurgelmeyer B) Link to comment Share on other sites More sharing options...
Gurgelmeyer Posted December 18, 2005 Author Share Posted December 18, 2005 (edited) AH - someone else figured this out too: http://www.msfn.org/board/index.php?showtopic=59364&st=0 /G B) Edited December 22, 2005 by Gurgelmeyer Link to comment Share on other sites More sharing options...
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