Custom Resolution Utility (CRU)

[ToastyX]

(07-04-2024 06:07 PM)nikif002 Wrote:  I am having an issue where custom resolutions stopped "taking" for me. I am on Windows 11, Dell XPS 9510 laptop. Hooked up to a Dell U3011 through HDMI and a Dell USB-C multiport adapter.

The monitor has never properly exposed its native 2560x1600 resolution as long as I remember, and I have always had to use CRU.

Now I am newly unable to add resolutions. I can add the detailed resolution as before (screenshot attached), however no matter how many times I run restart.exe, the asterisk remains indicating it has not been saved, and Windows won't let me choose the new resolution.

Formerly I have had this exact problem when installing the Intel "Arc" or "Iris XE" drivers or whatever, but it was always fixed by uninstalling those drivers and reverting to using the default drivers from Windows. This is no longer the case. I have tried everything I can think of -- actual restarts, re-installing and uninstalling the latest Intel drivers, I tried the beta Intel Graphics Control Panel to change the resolution (that has never really worked). Any ideas? I would love to understand more about what is happening here so I can fix it not just this time, but if it ever happens again in the future.

EDIT: It works with 30hz instead of 60. Am I just high and that's what I've always used? I swear it used to work with 60hz. I wish I hadn't wiped my old resolutions in an attempt to fix this.

Ideally you should use DisplayPort to avoid having to add 2560x1600 manually because the monitor doesn't officially support 2560x1600 with HDMI even though it will work if you can add it. The * means it is saved. It would say "(restart required)" if it wasn't taking effect. The GPU is definitely capable, so the driver is ignoring the resolution for some reason. I don't know if Intel listens to this, but check the maximum TMDS clock in the HDMI data block in the CTA-861 extension block. It should be high enough to accommodate the pixel clock for the resolution you want. I recommend just putting 340 MHz because that's the standard maximum for HDMI 1.4.