only fix 615 KDE freezing.

bpo4/615/acosail_bpo4_only_fixkde_240102.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+current_uid=$(id -u)
+
+if [ "$current_uid" -eq 0 ]; then
+  echo "please run as a normal user"
+  exit 1
+fi
+
+tab=$'\t'
+
+kde_conf="${HOME}/.config/kwinrc"
+if [ -e "$kde_conf" ]; then
+  true
+else
+  echo "file $kde_conf not exist"
+  exit 1
+fi
+
+confline_Xrander="Backend=XRender"
+sed -in "/\[Compositing\]/,/^$/{/^[[:space:]]*Backend=/{d}}" ${kde_conf}
+sed -in "/\[Compositing\]/a\\${confline_Xrander}" ${kde_conf}
+
+echo "all changes have been made, please reboot to take effect"