Aero disables on 2560x1440 dual monitor

[highpec]

Hi guys,

I have read about the limitation in Windows 7 for Aero to work, it's something like any width that exceeds 8192 (or close to this). However, when I switch both of my monitors to 2560x1440, which is nowhere near this limit, Aero is forcibly disabled.

Disabling then re-enabling DWM results in a glitchy, black, non-transparent screen. I've spent hours searching for solutions to this... including adding "UseMachineCheck" "Blur" and "Animations" into registry, uninstalling the latest DirectX update, etc. But nothing seems to work.

If I use any resolution below 2560x1440, Aero works fine. If I use 2560x1440 on one monitor, Aero works fine. I have an Nvidia 980ti, which is more than powerful enough to run Windows 7 dual monitors at 2560x1440.

Of course, I've also tried all of the generic, low hanging fruit solutions. I'm generally quite well versed with computers (I'm a coder by trade), but this is something I haven't encountered before.

Btw, it seems that when DWM crashes, or goes to this black glitchy screen, this is the dump in event viewer:

"The Desktop Window Manager has encountered a fatal error (0x88980406)"

I did some search on this, and it's where I found the resolution limitation for DWM... but I am not exceed or even close to that limitation.

Has anyone experienced this issue before? If so, how did you fix it? Thanks!

 

[Fox Computers]

Hi,

Just a quick suggestion while you await a response from a more experienced SevenForums member; disable Aero Peak.

Sorry if this is one you have already tried. Hope you can get this problem sorted!

Fox Computers

- - - Updated - - -

And for reference,

Microsoft Knowledge Base Archive (pkisolutions.com)

[FONT=&quot][h=2]Symptoms[/h][/FONT]
[FONT=&quot]Consider the following scenario:

• You are using Windows 7 with a Windows Aero theme.
• You attach two or more monitors to the computer in an extended desktop configuration.
• The resulting size of the extended desktop is more than 8192 pixels wide or 8192 pixels high.

[/FONT]

 

[file3456]

Run this. See if that fixes it.



View attachment Restart_Aero.bat


It's also possible you have some monkey business in your GPU's control panel.


Have you tried dxdiag in search? See if there are any problems for 32 and 64 bit drivers in dxdiag.