File plymouth-keep-KillMode-none.patch of Package plymouth

--- a/systemd-units/plymouth-start.service.in
+++ b/systemd-units/plymouth-start.service.in
@@ -6,12 +6,11 @@
 Before=systemd-ask-password-plymouth.service
 ConditionKernelCommandLine=!plymouth.enable=0
 ConditionVirtualization=!container
-IgnoreOnIsolate=true
 
 [Service]
 ExecStart=@PLYMOUTH_DAEMON_DIR@/plymouthd --mode=boot --pid-file=@plymouthruntimedir@/pid --attach-to-session
 ExecStartPost=-@PLYMOUTH_CLIENT_DIR@/plymouth show-splash
 Type=forking
 RemainAfterExit=yes
-KillMode=mixed
+KillMode=none
 SendSIGKILL=no