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init: fix loading of fbcon

we check if /sys/class/graphics/fb0 exists before loading fbcon and
allow user to disable tiwh nofbcon as boot option

--- a/initramfs-init.in

+++ b/initramfs-init.in

@@ -386,7 +386,7 @@

 myopts="alpine_dev autodetect autoraid chart cryptroot cryptdm debug_init

 	dma init_args keep_apk_new modules ovl_dev pkgs quiet root_size root

-	usbdelay ip alpine_repo apkovl alpine_start"

+	usbdelay ip alpine_repo apkovl alpine_start nofbcon"

 for opt; do

 	case "$opt" in

@@ -524,11 +524,11 @@

 scan_drivers

 eend 0

-ebegin "Setting up framebuffer console"

-if [ -d /lib/modules/`uname -r`/kernel/drivers/gpu ]; then

+if [ -z "$KOPT_nofbcon" ] && [ -e /sys/class/graphics/fb0 ]; then

+	ebegin "Setting up framebuffer console"

 	modprobe -q fbcon &>/dev/null

+	eend 0

 fi

-eend 0

 # check if root=... was set

 if [ -n "$KOPT_root" ]; then