HTPC keeps waking up every 30 min - PCI-to-PCI Bridge ???

Hi,

I’m running an HTPC Win 7 64 Bit since several years. Unfortunately I did ignore the rule “Never touch a running system.” As I’ve installed a week ago the latest Catalyst Package

After doing so the HTPC keeps waking up every 30 minutes. After about 7 minutes of inavtivity it gets to sleep again. I could track this in the event overview and by “powercfg –lastwake” I got the information for instance “PCI\VEN_1002&DEV_597F&SUBSYS_59571002&REV_00\3&18d45aa6&0&50” and the description “PCI-to-PCI Bridge”.

The vendor and device points to the AMD/ATI PCI-to-PCI bridge.

The system is based on a Gigabyte GA-MA770T-UD3P mainboard using an Athlon II X4 620 CPU and a Sapphire Ultimate Radeon HD6570 graphics card.

After recognizing the constant wake-up process I investigated the event log and installed an user defined “power trouble shooter” event log. It hints to the time I’ve installed the Catalyst Package, no other (know) changes have been done to the machine at this time (I did not check Win Updates yet).

First attempt was to restore the machine to a formerly working status (hence before the Catalyst installation), but it keeps waking up every 30 minutes

I’ve tried to find information on the Internet, I’ve tried to update drivers again, but that did not work.

In my hardware overview I find three Pci-to-PCI bridge entries, the last one related to the a.m. device number, but none of them is using AMD/ATI drivers, they are using Microsoft driver out of 2006 (6.1.7601.17514)


To my opinion, the event log does not show the root cause wrt wake up.

Any help/hint is really appreciated to resolve this issue. It is more than annoying and obviously not very energy efficient to start the machine waiting for input and going asleep again


Thanks and kind regards,
Joe

Hi,

just wanted to push my thread up as nobody replied yet.

Any ideas are really appreciated.

Thanks,
Joe

Hi,

the issue has gone. I did not change anything, but I discovered that the periodical wake-up has gone. Looking into the events I found a Microsoft Update which was installed at the time the issue stopped.

The MS Update is called KB2952664 and details can be found at
https://support.microsoft.com/en-us/kb/2952664

Whatever it did, my issue has been resolved

Thanks for your suggestions,
Joe