I'm using the latest Crimson 17.1.2 and got the problem, that i am not able to switch to the native monitor resolution from 2560x1440, as it not shows up in the list of the screen resolution setting. I tried to create a custom resolution but the software says, that this is not supported.The monitor is a newly bought Iiyama ProLite B2783QSU connected via Dual Link DVI with a native resolution of 2560x1440 and this is also reported from CRU - Windows driver for the monitor is also installed and includes 2560x1440 as max resolution...
So why does Crimson not check it??
Downgrade drivers to 16.x.x and try .... my LCD not working too on 17.x