Hello I have in laptop many devices that I don't use. For example DVD writer. But my greates problem is the unability to turn off under OpenBSD Nvidia GPU. Unfortunately I have Optimus laptop, so I don't have normal, independent hardware multiplexer. I have Intel and Nvidia GPUs, and Intel GPU is proxy for Nvidia GPU. I don't use Nvidia GPU under Linux and it is fine. However under OpenBSD I even can't turn off Nvidia GPU despite that GPU is not usable due to lack of drivers in OpenBSD for this GPU. Intel GPU is fine for me for Linux and OpenBSD tasks (I use Nvidia GPU for Autodesk Inventor in Windows). But Nvidia GPU is heating my laptop despite it isn't used by OpenBSD. It is significant change in temperature, under Linux and Windows (lightweight tasks) I have about 42 Celsius degrees (°C) and under OpenBSD default configuration when it is idle it is 67 Celsius degrees (°C), when I switched frequency of CPU to lowest possible by apmd it is still about 63 Celsius degrees (°C).! I think this can reduce lifetime of my laptop. I think that in OpenBSD there is currently no way to disable particular device, but as I understand PCI-Express has power-management capabilities and can turn off device. Is there any chance that in future version of OpenBSD will be implemented switch to turn off particular device by advanced users via sysctl or I don't know, /dev directory? Something like bbswitch under Linux. In any case there is output of my dmesg: http://daemonforums.org/showpost.php?p=50519&postcount=98
