solved: Re: 3 Displays on Focal Fossa

[Liam Proven]

On Sat, 25 Apr 2020 at 14:01, robert <robert at redcor.ch> wrote:
>
> exactly, but the "what a moron you are" part you did not mention!

I try to avoid doing that! :-)

I have encountered a similar situation before, back in the Athlon XP
era I think. I had onboard graphics, in the chipset not in the CPU,
and I wanted dual-head with an additional graphics card _as well_. No
joy. Adding a graphics card disabled the motherboard one, by design.
No way round it.

Also, more recently at work, I wanted triple-head. (My office had
multiple spare monitors around.)

2 mis-matched nVidia Fire cards would not work together. Different GPU
generations, different drivers. It works under Nouveau drivers, but
not very well -- e.g. there was display corruption in some programs.
You can't have 2 different nVidia drivers installed at once, either on
Windows or in Linux.

In Win10, the first card worked. Windows detected it, then installed
the driver on its own, then I had to reboot and 2 screens worked. Then
Windows detected the 2nd card, automatically installed the driver --
which stopped the _other_ driver working -- then it rebooted, only the
3rd screen came up. Then it tried to reinstall the newer driver, and
*CRASH*.

I only got Windows back by removing both cards.

I got it working, badly, with an old nVidia non-Fire card and a Fire
card, but then a new nVidia driver was released and it removed support
for the older card. >_<

At which point a colleague took pity on me and gave me an old gaming
card with 4 outputs. This works fine.

Lesson to learn from this?

Dual-head is much easier than it used to be. More than 2 screens
remains quite difficult without purpose-built (or at least
purpose-chosen) hardware. :-(

-- 
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