Re: Debian 12 PPC64 (MintPPC64), Two Monitors, Only One Being Used

Can you post your /var/log/Xorg.0.log and Xorg.1.log ?

On Sun, 2025-09-07 at 08:34 -0400, Michael Campbell wrote:
> Hi, 
> 
> My apologies for the repeat of this message. I am resending to make
> this a unique thread, as requested by Adrian and others.
> 
> Adrian, Jeroen, if creating a fresh message with a unique title
> doesn't make this a unique thread, could you point me at the
> requirements to do this please? Thanks!
> 
> --- repeated post ---
> 
> I have a late 2005 Power Mac G5 Quad running Debian 12 PPC64 with the
> MintPPC64 layer on it. I have two Apple 20" Cinema displays connected
> to the system via the two DVI ports supplied by my single nVidia
> GeForce 6600 video card (supported by the "nouveau" driver). 
> 
> Under Mac OS X (Sorbet) Leopard, both monitors are active and used as
> one extended desktop. Under Mint/Debian, only one is in use. 
> 
> I have researched extensively online and tried all sorts of
> solutions, largely involving xrandr and xset. Nothing has worked so
> far. xrandr reports two displays, which it names DVI-I-1 and DVI-I-2.
> 
> The usual prescription:
> 
> xrandar --output DVI-I-2 --auto
> 
> is accepted and executed without error, but the monitor stubbornly
> stays off. Correction: the power light stays on, but the screen stays
> off.
> 
> Constructions like:
> 
> xrandr --output DVI-I-1 --auto --output DVI-I-2 --auto --rightof DVI-
> I-1
> 
> also executes without error, but there is no change in the screen...
> it stays off.
> 
> The system understands that there is a second monitor... the mouse
> cursor will disappear into the second one. If I set it as primary,
> windows will open on that screen, but because it is off, I can't see
> them. I have occasionally managed to snag one of them and drag them
> back to the screen that IS on. 
> 
> It is as if everything is working logically, but physically, nothing
> is turning the screen on. The physical screen doesn't seem to be
> connected to the logical one.
> 
> I am stumped at this point. 
> 
> Any and all pointers much appreciated.
> 
> Regards,
> Michael