Can you check whether doing
cat > /etc/X11/xorg.conf.g/vga.conf <<EOF Section "Monitor" Identifier "Monitor0" Option "DefaultModes" "true" EndSection
Section "Device" Identfier "Device0" Option "monitor-VGA1" "Monitor0" EndSection EOF
restores the missing modes?
Can you check whether doing
cat > /etc/X11/ xorg.conf. g/vga.conf <<EOF
Section "Monitor"
Identifier "Monitor0"
Option "DefaultModes" "true"
EndSection
Section "Device"
Identfier "Device0"
Option "monitor-VGA1" "Monitor0"
EndSection
EOF
restores the missing modes?