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Chris77

Asus PQ321Q - Wrong display resolution monitored

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Hello, I have now an ASUS PQ321Q display with a native Resolution of 3840 x 2160 pixel, but AIDA64 displays a desktop resolution of 1920 x 1080 pixel. What is the failure?

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AIDA64 reports the current desktop resolution setting, which may or may not match the native resolution of the display.  You can adjust the desktop resolution by right-clicking on the Windows desktop --> Screen Resolution.

 

Regards,

Fiery
 

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Then please copy-paste the full content of the following pages of AIDA64 into this topic, so we can check out what's wrong.

 

- Display / Monitor

- Display / Desktop

- Display / Multi-Monitor

 

Thanks,

Fiery
 

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Monitor:

Monitor Properties 
Monitor Name PnP-Monitor (Standard) [NoDB]
Monitor ID ACI32A2
Model PQ321
Manufacture Date 1990
Serial Number None
Max. Visible Display Size 70 cm x 39 cm (31.5")
Picture Aspect Ratio 16:9
Horizontal Frequency 24 - 140 kHz
Vertical Frequency 20 - 77 Hz
Maximum Pixel Clock 300 MHz
Gamma 2.20
DPMS Mode Support Active-Off

 

 

Desktop:

Desktop Properties 
Device Technology Raster Display
Resolution 1920 x 1080
Color Depth 32-bit
Color Planes 1
Font Resolution 96 dpi
Pixel Width / Height 18 / 18
Pixel Diagonal 26
Vertical Refresh Rate 60 Hz
Desktop Wallpaper 
 
Desktop Effects 
Combo-Box Animation Enabled
Drop Shadow Effect Enabled
Flat Menu Effect Enabled
Font Smoothing Enabled
ClearType Enabled
Full Window Dragging Enabled
Gradient Window Title Bars Enabled
Hide Menu Access Keys Enabled
Hot Tracking Effect Enabled
Icon Title Wrapping Enabled
List-Box Smooth Scrolling Enabled
Menu Animation Enabled
Menu Fade Effect Enabled
Minimize/Restore Animation Enabled
Mouse Cursor Shadow Enabled
Selection Fade Effect Enabled
ShowSounds Accessibility Feature Disabled
ToolTip Animation Enabled
ToolTip Fade Effect Enabled
Windows Aero Enabled
Windows Plus! Extension Disabled
 
Problems & Suggestions 
Problem At least 85 Hz vertical refresh rate is recommended for classic (CRT) displays.

 

 

Multi-Monitor:

Device ID            Primary               Upper Left Corner      Bottom Right Corner
\\.\DISPLAY1      Yes                       (0,0)                          (1920,1080)

 


 

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It seems, that the problem has something to do with the dpi scaling in Windows, when the scaling is at 200%, a resolution of 1920 x 1080 is monitored, when the scaling is at 180%, a resolution of 2131 x 1199 is monitored and so on.

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We've implemented a workaround for the mentioned issue.  Make sure to upgrade to the latest beta version of AIDA64 Extreme Edition available at:

 

http://www.aida64.com/downloads/aida64extremebuild2578wrdfs3x2vhzip

 

After upgrading to this new version, make sure to restart Windows to finalize the upgrade.

 

 

Regards,

Fiery

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Hello,

 

many thanks for the workaround, but there is already something wrong, because now AIDA64 shows a resolution of 3835 x 2158 instead of the native 3840 x 2160 pixels.

 

Many thanks and best regards

 

Chris77

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We'll try to improve that part.  BTW, it's because AIDA64 has to "upscale" the resolution due to the dpi scaling mimics a lower resolution than the real one :)  And the upscaling trick seems to have some rounding issues...

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Since the upgrade to Windows 8.1, the problem is back. AIDA64 now shows the wrong resolution again (dpi scaling 175%, resolution in AIDA64: 2194 x 1234).

 

Best regards,

 

Chris77

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In Windows 8.1 DPI scaling has been revamped one more time (after revamping it in Vista, and then again in Win8).  It seems the new interface doesn't provide meaningful values, or at least we haven't yet figured out which API call to use to detect the native resolution of the display.  We'll do our best, but we eventually may be forced to simply drop the idea of detecting native resolution, and simply use the logical resolution setting Windows provides via standard API calls.  You can always check the native resolution of your monitors on the Display / Monitor page ;)

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Since the upgrade to Windows 8.1, the problem is back. AIDA64 now shows the wrong resolution again (dpi scaling 175%, resolution in AIDA64: 2194 x 1234).

We've just rolled out the first AIDA64 beta with proper handling of DPI scaling, as well as fix for the screen resolution detection issue:

https://www.aida64.com/downloads/latesta64xebeta

A few icons are left to be updated, and we also have to fix a few issues in the Monitor Diagnostics module. Let me know how it works on your system ;)

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