Monitor standby cycles twice before standing by for good

coch · 20 Jan 2018

Specs:
Desktop PC, custom build.
MB = ASUS Zenith Extreme X399
CPU = AMD Threadripper 1950X
GPU = AMD Rx Vega 64
32 GB RAM
Monitor = Acer XR341CK via DisplayPort
Windows 10 x64 build 1709.

I have monitor stand by set to 10 minutes.

The monitor stands by, then eventually, even without moving the mouse or touching the keyboard, it will wake by itself, then after a second timeout period it will standby again, this time for good.

To test this more efficiently, I set the monitor standby to 1 minute, and this happens every time (100% reproducible).
- I clocked the issue to 4 minutes i.e. the monitor wakes 4 minutes after the monitor goes on standby when set to standby after 1 minute, meaning 5 minutes after all input stops. Schematized:

Code:

Time = 0, I stop touching keyboard/mouse
Time = 1 minute, monitor stands by
Time = 5 minutes, monitor wakes by itself.
Time = 6 minutes, monitor stands by, and stays put this time

Oddly enough, setting standby to 2 minutes keeps the same time table (only change from above is in red):

Code:

Time = 0, I stop touching keyboard/mouse
Time = 2 minutes, monitor stands by
Time = 5 minutes, monitor wakes by itself.
Time = 6 minutes, monitor stands by, and stays put this time

Now, this mentions it is due to Firefox: https://www.thefreewindows.com/14060...diately-sleep/
However I shutdown Firefox and it still happens.

Anyone has a clue why this would happen?
I don't think this is an issue with my system, because even though I just finally decided to post about it now, it's been doing that for as long as I remember, from when I was still on Windows 7. I've been through Windows 8, Windows 8.1 and Windows 10 since then, and changed motherboard/RAM/CPU 4 times, graphics card 5 or 6 times, and monitors 3 times, and with all those hardware combinations the problem was present.

Seems to me like this is inherent to how Windows manages power? Anyone knows what Windows could be doing after 5 minutes that wakes the monitor?
Or maybe this is an AMD-specific issue? (I only ever had AMD systems).

coch · 20 Jun 2019

First, yes I know I'm replying to an old thread. But I'm the OP and this exact same problem still exists for me today, despite having gone through several Windows versions (1803, 1809, 1903; in my OP I was on 1709, I'm on 1903 now).

Plus, I have new information about it now:

I tracked down the problem to be related to my mouse. I use a Logitech Chaos Spectrum G900 mouse. That mouse allows wired and or wireless modes.

Now, the new information I found is:
1. The problem only happens if the mouse is used in wireless mode. When it's wired, no problem at all and the monitor stays off for good the first time it reaches the "Monitor standby" timeout.
2. It happens a fresh Windows install without anything else installed, and no tweaks applied. In other words, I reformat my PC, fresh Windows install, and on the very first boot before installing any driver or software the problem is already present. I'm using Win10 Pro with all auto-updates (including driver installs) disabled, so Windows hasn't automatically updated drivers either.

The above suggests that this is either a Windows issue, or a hardware issue (maybe the mouse in wireless mode send's some kind of event after a while which wakes up the computer?).

Makes me wonder why nobody else appears to have seen this problem though if this is a Windows issue.

Other things I've attempted to fix the issue, and which didn’t work: - Enabling "Allow the computer to turn off this device to save power" for all keyboard and mouse devices. - Enabling "Allow the computer to turn off this device to save power" for all USB Host Controllers. - Disabling Wake-on-LAN and Wake on Magic Packet in my network adapter driver (just in case the mouse "wireless" mode somehow communicates with the same frequencies as my Wi-Fi and would be picked up as a network event). - Plugging the mouse wireless receiver in a different USB ports.
- Nothing shows up on the Windows "Event Log".