Re: two separate GPUs

[eben@gmx.us]

On 2/23/25 13:42, Eben King wrote:
> I want to put one monitor (L, HDMI) on the onboard card (the one provided by
> the i5) and two more (M, DVI; and R, DP) on a graphics card (GTX 970).  The
> card works as well as it ever did, and its two work fine.  The onboard one
> is rotated.  It is connected, but when I run "startx" it retains the
> sideways text and doesn't show the X desktop.  The hardware's not disabled
> in the BIOS.  How should I proceed?
>
> I have Debian 12.9 (Bookworm), xorg something or other (not Wayland), and
> XFCE 4.18.


OK, I got it to show up by adding /etc/X11/50-onboard.conf which contains

Section "Device"
	Identifier "Card1"
	Driver	"intel"
	BusID	"PCI:00:02.0"
EndSection

Section "Screen"
	Identifier "Default Screen"
	Device	"Card1"
EndSection

However, it's oriented weird.  The monitor is physically rotated 90°
clockwise, so normally if I select rotation=left it looks correct.  Now,
rotation=left or right both put the top of the image on my left, and
rotation=none or inverted put the top of the image on my right.  I went so
far as to restart, and it's still that way.

It gets worse.  With rotation=left, the mouse pointer looks and moves as
you'd expect but the image top is to the left.

Have I implemented an unsupported configuration and should expect nasal
demons RSN?  Or has one driver or another made some assumptions that turned
out to be wrong?