diff --git a/files/board/arpl/p1/boot/grub/grub.cfg b/files/board/arpl/p1/boot/grub/grub.cfg
index 33020b92..ac0b894d 100644
--- a/files/board/arpl/p1/boot/grub/grub.cfg
+++ b/files/board/arpl/p1/boot/grub/grub.cfg
@@ -66,6 +66,7 @@ function set_gfxpayload {
 }
 
 set TERM=tty2
+set ARPL_CMDLINE=""
 
 search --set=root --label "ARPL3"
 if [ -s /zImage-dsm -a -s /initrd-dsm ]; then
@@ -86,7 +87,7 @@ if [ -s /zImage-dsm -a -s /initrd-dsm ]; then
   menuentry 'Boot DSM' --id boot {
     set_gfxpayload
     echo "Loading kernel..."
-    linux /bzImage-arpl console=${TERM} net.ifnames=0
+    linux /bzImage-arpl console=${TERM} net.ifnames=0 ${ARPL_CMDLINE}
     echo "Loading initramfs..."
     initrd /initrd-arpl
     echo "Booting..."
@@ -94,7 +95,7 @@ if [ -s /zImage-dsm -a -s /initrd-dsm ]; then
   menuentry 'Force re-install DSM' --id junior {
     set_gfxpayload
     echo "Loading kernel..."
-    linux /bzImage-arpl console=${TERM} net.ifnames=0 force_junior
+    linux /bzImage-arpl console=${TERM} net.ifnames=0 ${ARPL_CMDLINE} force_junior
     echo "Loading initramfs..."
     initrd /initrd-arpl
     echo "Booting..."
@@ -104,7 +105,7 @@ fi
 menuentry 'Configure loader' --id config {
   set_gfxpayload
   echo "Loading kernel..."
-  linux /bzImage-arpl console=${TERM} net.ifnames=0 IWANTTOCHANGETHECONFIG
+  linux /bzImage-arpl console=${TERM} net.ifnames=0 ${ARPL_CMDLINE} IWANTTOCHANGETHECONFIG
   echo "Loading initramfs..."
   initrd /initrd-arpl
   echo "Booting..."
diff --git a/guide.md b/guide.md
index 49d671d1..098f2f9f 100644
--- a/guide.md
+++ b/guide.md
@@ -30,7 +30,7 @@
   1. 引导盘只支持 sata / usb.
   2. 安装盘要大于 32GB.
   3. 内存需要大于 4GB.
-  4. DT的型号不支持sas控制器.
+  4. DT的型号不支持HBA扩展卡.
 
 # GPU
 * iGPU: https://jim.plus/