panelrob

No 2xDVI 1xHDMI and incorrect aspect ratio after upgrade from omega 14.12 to 15.7

Discussion created by panelrob on Jul 24, 2015
Latest reply on Jul 28, 2015 by panelrob

This week I upgraded from catalyst omega 14.12 to catalyst 15.7. I have a Radeon 280 which was happily outputting the following:

- HDMI to DVI adapter - 1920x1200 - Dell 2405FPW (native res 1920x1200)

- DVI - 1680x1050 Dell 2005FPW (native res 1680x1050)

- DVI - 1680x1050 Dell 2005FPW (native res 1680x1050)

 

Following the upgrade I am no longer able to output to more than 2 of these monitors at a time. According to http://support.amd.com/en-us/search/faq/170  my working set-up was never officially supported anyway, so it seems that functionality has been removed for some unknown reason.

 

But it gets much worse. If I attempt to output any resolution to either of my Dell 2005FPW via DVI, no matter what resolution I set, no matter whether I enable VSR or not, no matter whether I enable GPU up-scaling or not, no matter what preferred scaling mode I set, the output is ALWAYS 1920x1080 as measured at the monitor. The content of this 1920x1080 signal is then somewhat related to the chosen resolution with beautiful letter-boxing or scaling issues, depending on the exact combination of scaling at the monitor (Fill/Aspect), scaling in CCC, and VSR. In any combination either I have letter-boxing, or if the image fills the display then the image is in an incorrect aspect ratio. I know this becuase the monitor is categorically 16:10, so if I set CCC to output a resolution of 1680x1050 then a square image should be square on the display, it is rectangular. I do know how to use a ruler so I was able to check that myself. This is not entirely surprising as the resolution at the monitor is measured as 1920x1080 which is a 16:9 aspect ratio and entirely inappropriate for the display. In CCC under My Digital Flat Panels -> Properties the maximum reported resolution is 1680x1050, and yet Desktop Management -> Desktop Properties offers up to 1920x1080 even without VSR enabled which makes no sense at all. What is going on I do not know, but this is specific to the new driver with inconsistent behaviour across the UI and an output which is inconsistent with user configuration.

 

I do have an active displayPort to DVI adapter but this will negatively impact my switched HDMI setup. Please advise on both aspects of this post.

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