- Two are connected to the onboard system board.
Two are connected to GT-610 adapter.
I have four options for monitors in the BIOS. When running under Windows, it was just a question of how to determine which was primary. All four worked at all times.
Debian can use both video systems -- Just not at the same time!- Under Debian:
Three of BIOS options allow the two monitors connected to the GT-610 to display.
One of those knows about the Intel HD connected two displays and the mouse pointer displays on the other two, but nothing else displays. Draging something into it is like a blackhole.
When I set two of the other options Debian sees the GT-610 only.
One setting works on the Intel HD attached displays only
- Under Debian:
The proper drivers are all installed.
Clearly the hardware supports all four and has since 2012 under Windows on ALL four BIOS settings.
As a VM of Debian running on top of Windows I was able to even set it up to use all four monitors.
I have looked at syslog. When The GT-610 is the board it is using, I see an error about the Intel drivers. When the Intel HD displays are working, there is no message at all about the GT-610. It's like the board isn't there. There are error messages about the ACPI but nothing to point to video.
How do I force Bulleseye 11.5 to use all four? Is Debian the wrong OS for this?