Custom Resolution Utility (CRU)

[ToastyX]

(04-25-2019 06:08 PM)Deceptive Pastry Wrote:  Have a TCL S405 4k TV, laptop connected through HDMI, that I often game on. Initially when gaming in 1920x1080 or 1600x900 resolution, the TV or laptop seems to upscale and output to the native res of 4k as displayed when I hit the info button on the TV. The problem is my graphics card can only do up to 30hz at 4k, so as long as it is outputting in 4k I can't get 1080p 60hz even if that is what I have the game set to. I have solved this problem in 95% of games with CRU by deleting or lowering priority of 3840x2160 under detailed resolutions and moving 1080 to the top. This causes the image to be output at 1080p 60hz and the TV properly shows this in the info. Some rare games still give me odd issues, like I can run at 1600x900 60hz but if I set the game to 1080 it will resort to outputting 4k 30hz again. I'm hoping to better understand why this happens.

2nd issue is, sometimes I will lose audio over HDMI. I hit restart.exe, then the HDMI audio device will completely disappear from playback devices and I'm left with only "Speakers". If I unplug/replug HDMI cable to restore default TV settings the HDMI audio device will return. I have tried importing the hdmi-audio.dat extension block but I seem to be missing something there. It seems like if I simply deprioritize 3840x2160 instead of outright deleting it I can get 60hz without losing HDMI audio. But I'm not entirely sure if that is what's solving it.

The way it's supposed to work is if GPU scaling is enabled in the driver, lower resolutions are scaled to the first detailed resolution, and the only refresh rates that are available are the ones defined for that resolution. If GPU scaling is disabled, resolutions defined in the EDID (shown in CRU) are sent to the monitor. The driver also automatically adds some common lower resolutions as scaled resolutions if they aren't defined in the EDID, which is how 1600x900 exists regardless. Some games might be trying to switch to 1920x1080 @ 30 Hz for some reason, which would be scaled to 3840x2160 @ 30 Hz if 1920x1080 @ 30 Hz is not defined in the EDID.

The audio issue might be a driver bug. To troubleshoot both issues, I would try just the bare minimum configuration that does what you want.

Try importing this file and do NOT check the "Import complete EDID" option:
  test.bin (Size: 256 bytes / Downloads: 433)

That includes 1920x1080 @ 60 Hz, 3840x2160 @ 30 Hz, and HDMI audio.