1

Can't enable third monitor on second graphics card

view story
linux-howto

http://askubuntu.com – I had a system running 12.04 with a Radeon HD4870, and had the monitors correctly setup. I installed a second video card (Radeo HD5700), and can't get the default Monitor app to detect the monitor. The HD4870 has two displays connected via DVI, and the HD5700 has one display connected via DVI - VGA adapter. It appears that both cards are detected via lspci | grep VGA: 06:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV770 [Radeon HD 4870] 07:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Juniper [Radeon HD 5700 Series] But I can't seem to get a (HowTos)