From ac27fed47eb4590553e3e560d1f14033c0662ba9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Pierret=20=28fepitre=29?=
 <frederic.pierret@qubes-os.org>
Date: Sat, 9 Mar 2019 18:40:30 +0100
Subject: [PATCH] plymouth: ignore serial console hvc0

It fixes splash screen issue QubesOS/qubes-issues#3849

(cherry picked from commit af674124d6da121e285baf2b5b5ee412c8254c7e)
---
 kernel.spec.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel.spec.in b/kernel.spec.in
index c3e2fe2..f03f123 100644
--- a/kernel.spec.in
+++ b/kernel.spec.in
@@ -428,6 +428,12 @@ done
 %posttrans
 /bin/kernel-install add %{kernelrelease} /boot/vmlinuz-%{kernelrelease} || exit $?
 
+# with kernel-4.14+ plymouth detects hvc0 serial console and forces text boot
+# we simply make plymouth ignore it to recover the splash screen
+if ! grep -q '^GRUB_CMDLINE_LINUX.*plymouth.ignore-serial-consoles' /etc/default/grub; then
+    sed -i 's/^GRUB_CMDLINE_LINUX="[^"]*/& plymouth.ignore-serial-consoles/' /etc/default/grub
+fi
+
 # grubby (used by new-kernel-pkg) do not understand xen entries in grub2 config
 if [ -x /sbin/new-kernel-pkg -a -e /boot/grub2/grub.cfg ]; then
         grub2-mkconfig > /boot/grub2/grub.cfg