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Windows 7: Windows 7 1920x1080 resolution problem

05 Jun 2010   #1
cab3

Windows 7
 
 
Windows 7 1920x1080 resolution problem

My on-board Radeon HD 4290 video, along with my 24" LCD are having trouble displaying 1920x1080 resolution on Windows 7.

I have a new Asus M4A89GTG Pro motherboard with on-board Radeon HD 4290 graphics. I have a Sceptre 24" 1920x1080p capable montior attached via VGA (through a KVM). I know the monitor can do 1920x1080, as my Windows XP system displays it just fine.

The new motherboard, along with the latest Catalyst Display drivers from ATI seem incapable of displaying 1920x1080 resolutions. The Sceptre monitor doesn't seem to have Windows 7 drivers, so I've used the default 1920x1080 60Hz flatpanel as the monitor type (switched from Standard PnP). The Catalyst software will recognize the resolution, but won't allow 60Hz, but rather gives me some interlaced refresh rates, which the monitor can't display.

I'm not sure if the problem is with the drivers, monitor, or Windows 7. Any help much appreciated as this is frustrating me immensely!

Thanks!


My System SpecsSystem Spec
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05 Jun 2010   #2
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

cab3, welcome to the forums.

First thing that comes to mind,

Quote:
I have a Sceptre 24" 1920x1080p capable montior attached via VGA (through a KVM).
Have you connected the monitor directly to the motherboard to rule out it isn't the KVM causing the problem?
My System SpecsSystem Spec
05 Jun 2010   #3
kucing13

 

does the refresh rate change to 59Hz?
My System SpecsSystem Spec
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05 Jun 2010   #4
cab3

Windows 7
 
 

Quote   Quote: Originally Posted by stormy13 View Post
cab3, welcome to the forums.

First thing that comes to mind,

Quote:
I have a Sceptre 24" 1920x1080p capable montior attached via VGA (through a KVM).
Have you connected the monitor directly to the motherboard to rule out it isn't the KVM causing the problem?
Matter of fact, I just did that, and it seems that the KVM may be causing the problem after all. I'm a bit confused as to why, since I am using the same KVM on a Windows XP system, and it just happily displays the right resolution. When I went direct between the monitor and the system, I was able to get the full resolution. No idea why XP would provide 1920x1080@60Hz, while the Win7 system would only go to 1600x1200@60Hz.

Maybe it's time to upgrade the KVM if I can't get this working by brute force.

Thanks for the assist!
My System SpecsSystem Spec
05 Jun 2010   #5
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

Quote:
Maybe it's time to upgrade the KVM
Could be. If what it says here,

Quote:
Common display issues caused by KVM switches include:
  • not passing or altering EDID data from the monitor, or not passing incomplete EDID requests - may cause the OS to reset the resolution and refresh rate, or may not allow the OS to detect the presence of the monitor;
  • generating Hot Plug Detect (HPD) events for monitor arrival or removal upon switching, or not passing monitor power states - may cause the OS to re-detect the monitor and reset the resolution and refresh rate, or may cause the monitor to enter to or exit from power-saving mode;
  • passing its own EDID data containing a predefined set of standard display modes - may not allow the OS to set the desired resolutions and refresh rates;
KVM switch - Wikipedia, the free encyclopedia

is what is happening, then it definitely is time to get a new one.
My System SpecsSystem Spec
24 Apr 2012   #6
Rex Wu

Windows x, Mac OS x
 
 
Select New KVM switches for Windows 7

When select /upgrade new KVM switches for Windows 7 systems, the following important criteria should be included.

1. To avoid video resolution changing when selecting to/from Windows 7 systems,
make sure the KVM support Full-time EDID/DDC communication or called "Dynamic EDID mapping".

2. To avoid USB HID devices (keyboard, mouse or touch screen..etc) repeatedly mounting and dismounting when slecting to/from connected Windows 7 systems, make sure the KVM support USB DDM (Dynamic Devices Mapping).

3. Supporting of Special/functions keys of connected keyboard and mouse, make sure the USB DDM technology is on the spec.
My System SpecsSystem Spec
24 Apr 2012   #7
F5ing

Windows 7 Ultimate x64
 
 

Cheapest 4 port KVM I've found that appears to support properly was about $325US about 6 months ago. I'll see if I can find what brand that was.
My System SpecsSystem Spec
25 Apr 2012   #8
Rex Wu

Windows x, Mac OS x
 
 

They are cheaper and more reliable now. They can be found easily in Amazon.com.
Please see those users feedback of those models working with Windows 7.
You may also want to check, if they have some trade-in promotion program or not to save some costs.
My System SpecsSystem Spec
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 Windows 7 1920x1080 resolution problem




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