I have three monitors. Only two have a display. The solution that worked in the past was to increase the video memory in grub. I lost my old grub.conffile. So, instead of three displays, I only have two. I have been searching and I cannot find the option to add to the vmlinux line to increase the memory reserved for video. I tried vga=2400, but that didn't work (note: I have 3 1280x1024 displays). All I remember is that the last two times I had to do this, I searched for many days before finding it and then, magically, all three displays worked fine. Does anyone know what option that I'm missing might be?Update: I have been investigating and I've found that the error is a core dump from xrdg, loaded from /etc/xdg/xfce4/xinitrc:cat /dev/null $XRESOURCES | xrdb -nocpp -merge -If I comment that out, other files try to run xrdb, which core dump. So, apparently, it is xrdb which is trying to get more memory than is available. I'm trying to use that to figure out the kernel parameter for increasing the memory available.
Grub video memory settings?
xorg;grub2