• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

PC wakes from sleep but monitors do not

MichaelD

MichaelD

Lifer
I've been having this problem for about six months now. I thought a new monitor would fix the issue but it did not. Then I thought a new GPU would fix it; nope.

I use sleep mode for my PC. I activate either by hitting the sleep button on the KB or just letting it sit for an hour and it goes to sleep on it's own.

Probably about 50% of the time, when waking it from sleep, the computer "wakes up" (fans come on, hard drives are ticking) but the displays aren't receiving a signal and just stay in power-save mode. The only way to fix this is to hard-boot the PC, which is the worst thing you can do, and has resulted in Checkdisk running a hundred times. BTW, the system drive is an SSD and it is only 2 months old...same problem happened w/the old SSD.

I was thinking it could be power-related as my power supply (Corsair 1Kw) is about 10 years old. But, I run an overclocked system and it has never blue screened or crashed during heavy gaming, benchmarking or anything else.

What could be causing this? GPU and monitors are less than 2 months old. The MB/CPU/RAM are about 4 years old and the power supply about 10 years old. If it was the PS, wouldn't I be having other issues?

Thanks for your help.
 
Last edited:
Something similar started happening to me when I went from Windows 7 to Windows 8.1

Sometimes, when my computer sleeps, the power light on the case blinks. If it blinks, and I press the power button, it wakes up fine.

Sometimes, the light blinks, I press the power button and it stops blinking, but the monitor doesn't come on.

I've set my computer to sleep at 5 hours to "remedy" the situation .
 
The symptoms exactly match what an outdated PSU combined with a Haswell CPU would produce. A 1000 watt PSU combined with modern hardware is also (unless you're running multiple high wattage GPU's) probably excessive for your needs. However, please provide further system details, such as: CPU, motherboard, GPU, type of monitor connection cable, drive storage, etc.
 
There is a setting for re-executing the VGA BIOS code when waking from sleep. It is called by various names in the BIOS (can't recall off-hand). You might need to enable that feature.
 
Thanks for all the replies. I didn't think system specs were relevant, but those are the rules, right? ()🙂

Asrock P67 Extreme 4 (latest/newest BIOS was like 3 years ago)
i2500K @ 4.0GHz (through "easy overclock" in BIOS)
Giant heatpipe cooler w/120mm fan (can't remember)
16GB (4x4GB) Samsung PC12800 (no OC)
Gigabyte GTX970 (no OC)
Two brand new Dell U2415 hooked up by brand new DisplayPort cables
Corsair 1Kw PSU (left over from a very old Dual Xeon video editing system with 10 HDDs...that's why I bought this monstrosity)
Samsung Evo 840 for System drive
Latest GForce drivers

This issue happened with different monitors hooked up by DVI and with a different GPU and with about 4 older versions of the GForce driver. And I'll state again that I have zero issues when the system is up and running. Gaming is great, benchmarking is great, surfing is great.

I'm betting it's the "cache video bios" setting or whatever it is in the system BIOS, which has been mentioned. I will try that...and see what happens, but keep the thoughts coming!!
 
Last edited:
You must log in or register to reply here.

TRENDING THREADS

Back
Top