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Res drop at Windows login (on one screen)

DTWD

DTWD

DTWD

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Joined
19 Jan 2010
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582
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This one is confusing me.

On my work PC I am running 2* 1920x1200 monitors on DVI, hooked up to a NV EVGA GT 640 2GB.

Whenever I power on the PC the system boots up and both displays look as they should. Once booted the main screen shows the login box at full res, the second monitor is blank. I log in and virtually instantly the primary monitor drops to 640x480, while the secondary stays at full.

I switch the primary monitor back up to full res and all is well in Windows...until.

If someone Skype's me it's fine, however if someone sends me a link in a Skype message and I click that link, again my primary monitor drops res to 640x480. Once everything has been restored back to it's proper settings it's fine and stable until I either reboot or click on a Skype link.

I have run various GPU stress tests and monitored both the output and the temps and all is fine. So I am not sure if it's the GPU or not.

I have done a clean install of the NV drivers. I was previously using the latest stable release, but I tried the beta's this morning, with no change.

I don't think it's just dropping res. I think it's also, very quickly, switching off the monitor output as all my windows move to the secondary monitor and are all over the place.

So any ideas? It's an odd one and something Google doesn't appear to be helping me solve.
 
I've had a problem with this since switching to DisplayPort. With DVI my PC would always use the correct res of 1080p. Since using a DP cable, there's now a 50/50 chance that the PC will drop to 640x480, and require a reboot to show anything higher.
 
I figured it out, eventually...as in today.

It had nothing to do with the GPU but I am updating this in case anyone else has the problem and finds this via a search.

The problem was to do with Skype (which thanks to an SSD and setup loads as soon as you log in). I dislike the way that programs like Skype feel the need to use the task bar all the time in Windows 7. I much preferred them when they had a nice little icon next to the clock and then popped up in the task bar when they wanted something, for instance someone messaged you.

In order to get that functionality back I switched Skype to use compatibility mode, specifically Vista Sp2. It appears that, either by accident or design, the 640*480 tick box is also ticked when it's activated...something I didn't notice. A quick google shows that I am not the only one this has happened too, which makes me think it might do it itself.

Anyway, it's sorted now, untick that box and it's fine.
 
Since you bumped the thread, thought I'd post about my issue too :p

Since switching to (mini) DisplayPort, on resuming from S3 sleep there was a 50/50 chance I'd be stuck in 640x480 mode.

Since I turned the Dell monitor from auto-sense input to DP input only, this hasn't happened (touch wood). I'm guessing the monitor didn't respond quickly enough to the DP wake up signal, and the computer wasn't sure if a monitor was attached? I have no idea really :p
 
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