I cannot get my dual Asus monitors not to mirror, when using Fedora 23. I had been using them without issue (screen sharing) on another HD with Kali, and also another HD with Windows 10. It's the same hardware.
From 'lspci' [AMD/ATI] Cypress LE [Radeon HD 5830] is my graphics card.
2nd monitor doesn't appear in the display/monitor settings.
I have unsuccessfully tried to install graphic drivers previously and it ended up causing issue when booting and the system would go blank/black screen part way through the Fedora loading bar screen - and not respond.
1 out of about 20 reboots, I could actually get into the log in screen.
Although, This is a fresh install - no such drivers installed as yet.
Any help would be appreciated - I am a Linux novice FYI.
Cheers