Issue with Intel Iris Xe Graphics Driver – Ultrawide Monitor Resolution & Refresh Rate on Dell Vostro 3400

Dear Dell Support Team,

I am encountering a driver-related issue on my Dell Vostro 3400 (Service Tag: *) when connecting to a Dell S3422DWG monitor (3440x1440).

All newer Intel graphics drivers tested:

• Fail to provide the correct aspect ratio,
  

• Do not expose the native resolution 3440x1440 (image is stretched and unusable).
  

According to Intel’s official specifications, the Intel Iris Xe Graphics (Tiger Lake-UP3, i5-1135G7) supports 3440x1440 at refresh rates up to 120Hz over HDMI. The monitor (Dell S3422DWG) and HDMI cables used are fully compatible with these refresh rates.

However, the Dell-provided/validated graphics drivers do not allow selecting refresh rates higher than 60Hz at 3440x1440. This clearly indicates a driver limitation, not a hardware limitation.

System tested with:

• BIOS, chipset and Windows fully updated (Windows 11 Pro x64, Build 26100.6584, 24H2),
  

• Multiple HDMI 2.0/2.1 cables,
  

• Another Dell Vostro 3400 unit (same result),
  

• All other drivers updated.
  

System specifications:

• CPU: Intel Core i5-1135G7
  

• GPU: Intel Iris Xe Graphics
  

• Motherboard: DELL 0GGCMJ (Intel Tiger Lake-UP3 PCH-LP)
  

• RAM: 32GB DDR4 (dual channel, 1333 MHz effective, 17-19-19-35 timings)
  

My questions:

1. Why does only driver 30.0.101.1338_A04 expose the proper ultrawide resolution, while newer drivers break it?
   

2. Will future Dell/Intel graphics drivers restore proper support for 3440x1440 resolution and refresh rates up to 120Hz, as officially supported by the Intel Iris Xe GPU?
   

3. Is there a known workaround (e.g., custom resolution profile or INF modification) to unlock the higher refresh rates until an official fix is released?
   

This issue is fully reproducible on multiple systems of the same model and is clearly driver-related.

Thank you for your support and clarification.