Custom Resolution Utility (CRU)

[Bklynnykid]

(01-22-2014 05:30 AM)Bklynnykid Wrote:  

(01-22-2014 04:04 AM)Bklynnykid Wrote:  

(01-21-2014 01:26 AM)ToastyX Wrote:  

(01-20-2014 02:31 AM)Bklynnykid Wrote:  But to answer your question, at the default HDMI resolution of 1920x1200@60Hz audio always works and I do not have to use any dat files. It only fails when I use my custom resolution without a dat file. Any idea why that happens? My Dell U3011 supports a max resolution of 2560x1600@60Hz. If I do not use the dat file, I have to uncheck the extension block in order to get my custom resolution to work.

That's because audio support is defined in the extension block, so it needs to be enabled for audio to work. AMD's driver also listens to the HDMI pixel clock limit in the extension block, which is why the file is needed to for the custom resolution to work with the extension block enabled. The file overrides the limit and includes the audio support information. The limit override only works with some monitor/GPU combinations, which is why the patch is needed in some cases.

Looks like checking GPU scaling was causing the issue. The "no audio over HDMI" came back and unchecking GPU Scaling in CCC immediately fixed the issue without even rebooting the PC. Have you seen this behavior before?

That wasn't it. Lost audio again after a reboot. However, Checking/Unchecking GPU scaling restores audio immediately. I am going to put the HD 6750 back in and see how it does. Looks like this 7750 may be having issues, which is unfortunate.

Experienced the same issue with both cards. Must be an AMD driver issue at this point.