On Mon, 21 Dec 2020, Brian Buhrow wrote:
Yes, I have a very old monitor, an old Sony Trenitron multisync. I can probably find a dotclock value to use in this configuration, but I don't know how to put it in the i915drmkms driver. Can I put in a number with sysctl?
I don't know of any sysctl for this. Nor do I know how to pass GTF/CVT modelines to the driver like you can do for Linux. The solution here might be to write a small program to use the DRM ioctls to set the desired mode (like with X and xrandr). I'll root around. In the meantime, try genfb(4) + wsfb(4): https://www.unitedbsd.com/d/271-wfsb/6 -RVP