diff --git a/device/rockchip/ok3568c/config b/device/rockchip/ok3568c/config
index 3382eb6..97b170c 100644
--- a/device/rockchip/ok3568c/config
+++ b/device/rockchip/ok3568c/config
@@ -2,7 +2,7 @@ ARCH="aarch64"
 BOOT_SOC="rk3568"
 
 # kernel section
-KERNEL="https://github.com/armbian/linux-rockchip.git#rk-6.1-rkr3"
+KERNEL="https://github.com/armbian/linux-rockchip.git#rk-6.1-rkr4.1"
 PRESET_CONFIG="kernel_ok3568_defconfig"
 DTB="dtbs/rockchip/rk3568-ok3568c"
 
diff --git a/utils/bootstrap_setup.py b/utils/bootstrap_setup.py
index 303349f..f39db99 100644
--- a/utils/bootstrap_setup.py
+++ b/utils/bootstrap_setup.py
@@ -69,7 +69,7 @@ def run_dnf_install(config, dnf_conf_path, rootfs_dir, arch, extra_pkgs=""):
         "install"
     ] + pkgs.split()
 
-    subprocess.run(dnf_command, check=True)
+    subprocess.run(dnf_command, check=True, stdout=subprocess.DEVNULL)
 
 
 def set_root_password_with_systemd(rootfs_dir, password_root):