diff --git a/0004-Solve-the-problem-that-biometric-devices-cannot-read.patch b/0004-Solve-the-problem-that-biometric-devices-cannot-read.patch
new file mode 100644
index 0000000..81fc842
--- /dev/null
+++ b/0004-Solve-the-problem-that-biometric-devices-cannot-read.patch
@@ -0,0 +1,33 @@
+From e3878c5a0fd9f0f9aa8ab9c36298f998791e7fef Mon Sep 17 00:00:00 2001
+From: tanyulong <tanyulong@kylinos.cn>
+Date: Fri, 29 Oct 2021 10:43:36 +0800
+Subject: [PATCH] Solve the problem that biometric devices cannot read
+
+---
+ ukui-greeter/BiometricAuth/biometricdeviceinfo.cpp | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/ukui-greeter/BiometricAuth/biometricdeviceinfo.cpp b/ukui-greeter/BiometricAuth/biometricdeviceinfo.cpp
+index 23196d1..48dd8f2 100755
+--- a/ukui-greeter/BiometricAuth/biometricdeviceinfo.cpp
++++ b/ukui-greeter/BiometricAuth/biometricdeviceinfo.cpp
+@@ -113,6 +113,16 @@ QString GetDefaultDevice(const QString &userName)
+ //    qDebug() << "configure path: " << settings.fileName();
+ 
+     QString defaultDevice = settings.value("DefaultDevice").toString();
++
++
++    if(defaultDevice.isEmpty())
++    {
++	QString configPath = QString("/var/lib/lightdm-data/%1/" UKUI_BIOMETRIC_CONFIG_PATH).arg(userName);
++	QSettings settings(configPath, QSettings::IniFormat);
++	defaultDevice = settings.value("DefaultDevice").toString();
++    }
++
++	
+     if(defaultDevice.isEmpty())
+     {
+         QSettings sysSettings(UKUI_BIOMETRIC_SYS_CONFIG_PATH, QSettings::IniFormat);
+-- 
+2.30.0
+
diff --git a/ukui-greeter.spec b/ukui-greeter.spec
index 4f3b45d..5f04aea 100644
--- a/ukui-greeter.spec
+++ b/ukui-greeter.spec
@@ -1,7 +1,7 @@
 %define debug_package %{nil}
 Name:           ukui-greeter
 Version:        3.0.1
-Release:        5
+Release:        6
 Summary:        Lightdm greeter for UKUI
 License:        GPL-2.0
 URL:            http://www.ukui.org
@@ -24,6 +24,7 @@ patch0:  0001-fix-icon-misplaced.patch
 patch1:  0002-fix-ukui-greeter-desktop-option-issue.patch
 patch2:	 0001-Avoid-problem-of-writing-Chinese-garbled-characters.patch
 patch3:  0003-add-set-dpi.patch
+patch4:  0004-Solve-the-problem-that-biometric-devices-cannot-read.patch
 
 %description
 A greeter for UKUI desktop environment written by Qt5.
@@ -35,6 +36,7 @@ A greeter for UKUI desktop environment written by Qt5.
 %patch1 -p1
 %patch2 -p1
 %patch3 -p1
+%patch4 -p1
 
 %build
 qmake-qt5
@@ -59,6 +61,9 @@ gzip  -c ukui-greeter/man/ukui-greeter.8 > %{buildroot}/usr/share/man/man8/ukui-
 %{_datadir}/xgreeters/ukui-greeter.desktop
 
 %changelog
+* Fri Oct 29 2021 tanyulong <tanyulong@kylinos.cn> - 3.0.1-6
+- Solve the problem that biometric devices cannot read
+
 * Fri Oct 29 2021 tanyulong <tanyulong@kylinos.cn> - 3.0.1-5
 - add set dpi