On Wed, Oct 8, 2014 at 4:41 PM, Andrey Germakovski germakovskia@ainfosec.com wrote:
FirePro W600 does not work with more than 4 monitors,
After 5th monitor attached X acting very slow.
Or if I call drmModeSetCrtc function 5 times one time for each of the monitors, it failing out
I suspect you are running out of CPU accessible vram depending on your configuration. There are patches for mesa and the kernel to allow the use of non-CPU accessible vram for display buffers in kernel 3.17 and mesa git so you might try a newer kernel and mesa.
Alex