Hi Meo
I am sure you know this but you seem to be asking for piCore help while you have a 8G RPi and I would urge you, especially as one of your posts suggests you tend to compile software....stay with piCore64 14.x and UNTIL YOU GET a better reply.....here are my configs and setups.
puzzle 1...I had spinnig glxgears with Xorg not Xorg-3d....but I have changed my onboot.lst so that it reads
libXcursor.tcz
numlockx.tcz
graphics-KERNEL.tcz
xrandr.tcz
Xorg-3d.tcz
jwm.tcz
dejavu-fonts-ttf.tcz
lxterminal.tcz
leafpad.tcz
pcmanfm.tcz
mc.tcz
alsa.tcz
alsa-utils.tcz
chromium-browser.tcz
I have NO graphic configs in /opt that affects me.
I have a simple $HOME/.xsession but I increased the sleep command for you to try and maximise the chance you succeed. I spent more than 3 seconds typing this so no loss of time for me.
sleep 9
Xorg -nolisten tcp &
export XPID=$!
waitforX || ! echo failed in waitforX || exit
"$DESKTOP" 2>/tmp/wm_errors &
export WM_PID=$!
[ -x $HOME/.setbackground ] && $HOME/.setbackground
[ -x $HOME/.mouse_config ] && $HOME/.mouse_config &
[ $(which "$ICONS".sh) ] && ${ICONS}.sh &
[ -d "/usr/local/etc/X.d" ] && find "/usr/local/etc/X.d" -type f -o -type l | sort | while read F; do . "$F"; done
[ -d "$HOME/.X.d" ] && find "$HOME/.X.d" -type f -o -type l | sort | while read F; do . "$F"; done
Unlike my TC x86/x86_64 setups.....my RPi has home persistence. Such that home/tc is named in /opt/.filetool.lst
OK lets look at /mnt/mmcblk0p1
I have no graphics config in cmdline.txt
but config.txt has the following snippets
[PI4]
initramfs rootfs-piCore64-14.0.gz,modules-6.1.25-piCore-v8.gz followkernel
kernel kernel6125v8.img
arm_64bit=1
[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-kms-v3d-pi4
# max_framebuffers=2
max_framebuffers=1
# Run as fast as firmware / board allows
arm_boost=1
[all]
#dtoverlay=vc4-kms-v3d
I have one hdmi cable to one monitor....I know you may have some other settings for you TV