Hi,
while the VGA port on my T440s laptop is working, the
minidisplay port is not working (at least with an
amazonbasics Mini DisplayPort to HDMI cable.
With not working I mean: VGA is recognized by xrandr,
minidisplayport isn't.
Any idea how I can debug this? Has anyone experienced
the same issue?
This is on NetBSD 8.0 GENERIC / amd64
I have a T530 (with the dual Intel/Nvidia video chipset) - I suspect it may be a slightly different case, but just for reference:
When I boot with Intel enabled only the VGA port works (also tested with a Thinkpad dock which has multiple DVI and other ports, and only the VGA port works on that too).
When I boot with Nvidia enabled the DisplayPort works, but the display shows video corruption and rapidly becomes instable.
Interestingly when I boot Windows with the BIOS locked to Intel only, VGA is also the only port that works.
David