I will attempt to post an nvidia-bug-report.log.gz later (I’ve had to revert to nouveau) but here’s the problem:
I am running Linux Mint 16 (Petra)
I am running the default driver nvidia-319 shipped with the distro
I have 2x GTX480 cards
I have three monitors
Using the Nvidia driver, all monitors and GPUs are picked up by the proprietary utility.
However, similarly to the report at https://devtalk.nvidia.com/default/topic/719768/linux/304-121-ubuntu-14-04-xrandr-1-4-multi-gpu-not-being-detected/ when I run xrandr --listproviders I am only shown a single provider – the first card.
I do not want to run xinerama as it is a pain in the neck to setup and should be superseded by xrandr.
Using the nouveau driver I can use all three screens exactly as I would like, but the performance is not good.
So, I have two questions:
1.) Is this behaviour by design or a bug? I note at http://uk.download.nvidia.com/XFree86/Linux-x86/319.12/README/randr14.html that the driver only supports the Source Output capability; would that stop me just seeing two different card providers in xrandr?
2.) If the former is true, is there a way that I can work around this? Could, for instance, setting the modesetting driver on one of the devices be a workaround?
Any suggestions would be very much appreciated.
nvidia-bug-report.log.gz (126 KB)