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Windows 7: Monitor goes black when attempting to switch user

06 Feb 2010   #11



I have this problem too. I had it in Windows Vista. I have it in Windows 7. The screen goes blank for about 10 seconds at 2 points during the switching process. It must be a signal-out bug in Windows, because my monitor displays this monitor-hardware symbol on my screen indicating it has no signal.

Microsoft -- FIX PLEASE!

My System SpecsSystem Spec
07 Feb 2010   #12

Windows 7 Ultimate x64

Update: they couldn't fix it, they could only make it stop for a few hours. I had to reinstall Vista. I've given up. Thanks for nothing MSFT
My System SpecsSystem Spec
19 Feb 2010   #13

Windows 7 x64 Professional

Again, exactly the same problem on 64-bit 7 Professional.
Clicking switch-user makes the screen go black for a couple of seconds. Same thing happens on login..
Running a dual-screen setup with ViewSonic LCDs and a nVidia 8600 GT..

My System SpecsSystem Spec

25 Feb 2010   #14

Windows 7 Professional x64
Are your running SoftOSD?

I had almost this exact same problem. After doing a user switch (fast user switching), the screen would black out for a second or two about 5 to 30 seconds after doing a user switch. It was more annoying than anything else.

As it turns out, it was the SoftOSD service that caused the problem. SoftOSD, produced by EnTech Taiwan for OEMs and it is a great product supplied by a number of monitor manufactures. It allows you to adjust you monitor hardware settings, among other things, through a software interface.

If you loaded all the software that came with your monitor, SoftOSD may be part of that package. In my case SoftOSD came with my Lenovo L220x monitor. I killed the SoftOSD service and the monitor black-out problem after user switching went away.
My System SpecsSystem Spec
25 Feb 2010   #15

MS Windows 7 Ultimate SP1 64-bit

Lo and behold. One learns something new every day.

I seldom switch user but you made me curious.

User switch runs about 6 seconds of black screen.

I realize much has to be done behind the scenes to save info on present user and prepare for new user. I would say MS's mistake was to simply show a black screen. Perhaps a screen saying "Busy saving and initializing" or something to that effect would help give us a warm puppy dog feeling about switching user.

thanks for pointing this out.
My System SpecsSystem Spec
06 Dec 2010   #16

Windows 7 Ultimate x64

I too am suffering from the same Black Screen issue and wondering if anyone has found a solution?

The only difference with my issue is the monitor will not come out of the standby mode (or black screen). This doesn't happen every time I switch users either, it's very random but it does happen several times a week depending how much use the PC sees that week.
In the past when this would happen I would push the power button which forces the PC into Sleep mode, once the power cuts off and fans spin down I push the power button again to wake the pc up. It usually resumes right back at the login screen. From there I can log into my account like normal.
The last time this happened I decided to unplug the monitor cable going into the video card and plug it back in; low and behold the monitor sprang back to life showing the desktop.
My System SpecsSystem Spec
04 Jan 2011   #17

Win 7 Ultimate - 64

I have the extact same problem.

WORKAROUND: When this happens, I push the power button on my monitor to turn off the monitor. Then I turn the monitor back on (no unplugging or restarting).

I'm extremely annoyed that MSFT has no fix for this yet.
My System SpecsSystem Spec
04 Jan 2011   #18

Windows 7 Ultimate x64

Quote   Quote: Originally Posted by camchute View Post
I have the extact same problem.

WORKAROUND: When this happens, I push the power button on my monitor to turn off the monitor. Then I turn the monitor back on (no unplugging or restarting).

I'm extremely annoyed that MSFT has no fix for this yet.
That doesn't work for me.
My workaround has been to unplug the monitor input cable from the video card and plug it back in; while powered and running. Probably not the best idea for either devices but once I plug it back in the monitor wakes back up.
I've had to do this three or four times since my last post... and come to think of it my monitor hasn't bugged out in quite a while.
Geeze, if that didn't just invite Murphy over I don't know what will.
My System SpecsSystem Spec
10 Dec 2011   #19

Windows 7 Ultimate x64

Hey there everyone... i came across this thread while searching about the same exact problem online. And i registered just to join in on this topic! :) In short, i have multiple user accounts on my system and whenever i use the "switch user" option, the monitor blacks out for around 6 to 8 seconds as my account is being switched. Like everyone here probably knows, this is quite a pain!

So here's my setup:

Windows 7 Ultimate x64
Intel HD 2000 Graphics (part of the i3 Sandy Bridge)
ViewSonic 22" LED monitor running at 1920x1080 native resolution
Output to the monitor is via an HDMI interface on the motherboard

Now i know it's not the monitor cause i used it earlier in a different system without this problem. Though i can't say I'm certain it's a problem with the OS, i feel certainly inclined towards that answer. Either the OS (or some software / driver attached to it) is causing this problem to happen. I had a different system earlier that was running on the same 64-bit OS. It was a Core2Duo and had an ATI Radeon HD 4870. There was no lag whenever switching users on that system.

I've been researching this issue for quite a number of days and the best answer i was able to find was by two people in this same post:

One mentioned that a service might be running that causes the screen to blackout. I searched for any possible service that might be causing this (through services.msc) but i couldn't identify anything easily. With somewhere close to 100+ services listed, it's not exactly an easy thing to do.

Another person suggested trying to go into safe-mode to see if the problem goes away. And yes, it does go away. Switching through user accounts in safe mode is so swift and easy without any black screens or delays.

So that means the OS (or some driver / software) is causing this problem when the OS runs in it's normal mode. But what ??? Well, i'm not an expert on this issue. So i would really love to hear what everyone has to say. I hope someone somewhere has a fix for this...
My System SpecsSystem Spec
12 Dec 2011   #20

Windows 7 Ultimate x64

This may be a long shot for you but I took some contact cleaner and cleaned out the plug at the end of the monitor cable as well as the DVI port at the back of the video card. Looking at my last post on this topic, it's been almost a year since having any issues.
My System SpecsSystem Spec

 Monitor goes black when attempting to switch user

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