diff --git a/firmware/target/hosted/agptek/button-agptek.c b/firmware/target/hosted/agptek/button-agptek.c
index 83953e0dab..2c84a50405 100644
--- a/firmware/target/hosted/agptek/button-agptek.c
+++ b/firmware/target/hosted/agptek/button-agptek.c
@@ -70,14 +70,14 @@ static int button_map(int keycode)
 
 void button_init_device(void)
 {
-    const char * const input_devs[] = {
+    const char * const input_devs[NR_POLL_DESC] = {
         "/dev/input/event0",
         "/dev/input/event1"
     };
 
     for(int i = 0; i < NR_POLL_DESC; i++)
     {
-        int fd = open(input_devs[i], O_RDWR | O_CLOEXEC);
+        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
 
         if(fd < 0)
         {
@@ -146,4 +146,3 @@ void button_close_device(void)
         close(poll_fds[i].fd);
     }
 }
-
diff --git a/firmware/target/hosted/aigo/button-erosq.c b/firmware/target/hosted/aigo/button-erosq.c
index 2735c48c71..db7f7e24e5 100644
--- a/firmware/target/hosted/aigo/button-erosq.c
+++ b/firmware/target/hosted/aigo/button-erosq.c
@@ -38,7 +38,7 @@
 #include "backlight-target.h"
 #include "erosqlinux_codec.h"
 
-#define NR_POLL_DESC    3
+#define NR_POLL_DESC    2
 static struct pollfd poll_fds[NR_POLL_DESC];
 
 static int button_map(int keycode)
@@ -82,18 +82,18 @@ static int button_map(int keycode)
 
 void button_init_device(void)
 {
-    const char * const input_devs[] = {
+    const char * const input_devs[NR_POLL_DESC] = {
         "/dev/input/event0", // Rotary encoder
         "/dev/input/event1"  // Keys
     };
 
     for(int i = 0; i < NR_POLL_DESC; i++)
     {
-        int fd = open(input_devs[i], O_RDWR | O_CLOEXEC);
+        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
 
         if(fd < 0)
         {
-            panicf("Cannot open input device: %s\n", input_devs[i]);
+            panicf("Cannot open input device: %s (%d)\n", input_devs[i], errno);
         }
 
         poll_fds[i].fd = fd;
diff --git a/firmware/target/hosted/fiio/button-fiio.c b/firmware/target/hosted/fiio/button-fiio.c
index 79ed702668..134ec5a426 100644
--- a/firmware/target/hosted/fiio/button-fiio.c
+++ b/firmware/target/hosted/fiio/button-fiio.c
@@ -85,7 +85,7 @@ static int button_map_on(int keycode)
         case KEY_F8:
             key_power_delay = 0;
             return BUTTON_POWER;
-        
+
         case KEY_HOME:
             key_home_delay = DEF_DELAY;
             return BUTTON_OPTION;
@@ -147,7 +147,7 @@ static int button_map_off(int keycode)
 
         case KEY_F8:
             return BUTTON_POWER;
-        
+
         case KEY_F9:
             return BUTTON_OPTION;
 
@@ -168,7 +168,7 @@ static int button_map_off(int keycode)
 static int button_map_timer(void)
 {
   int map = 0;
-  
+
   if (key_enter_delay)
   {
     if (--key_enter_delay == 0) map |= BUTTON_PLAY;
@@ -219,14 +219,14 @@ static int button_map_timer(void)
 
 void button_init_device(void)
 {
-    const char * const input_devs[] = {
+    const char * const input_devs[NR_POLL_DESC] = {
         "/dev/input/event0",
         "/dev/input/event1",
     };
 
     for(int i = 0; i < NR_POLL_DESC; i++)
     {
-        int fd = open(input_devs[i], O_RDWR | O_CLOEXEC);
+        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
 
         if(fd < 0)
         {
diff --git a/firmware/target/hosted/sonynwz/button-nwz.c b/firmware/target/hosted/sonynwz/button-nwz.c
index 2fb23e1471..f85a4be496 100644
--- a/firmware/target/hosted/sonynwz/button-nwz.c
+++ b/firmware/target/hosted/sonynwz/button-nwz.c
@@ -156,7 +156,7 @@ static void key_init_state(int fd)
 
 static void open_input_device(const char *path)
 {
-    int fd = open(path, O_RDWR);
+    int fd = open(path, O_RDONLY | O_CLOEXEC);
     if(fd < 0)
         return;
     /* query name */
diff --git a/firmware/target/hosted/xduoo/button-xduoo.c b/firmware/target/hosted/xduoo/button-xduoo.c
index 3dc1bdc13a..67cb9a6c46 100644
--- a/firmware/target/hosted/xduoo/button-xduoo.c
+++ b/firmware/target/hosted/xduoo/button-xduoo.c
@@ -76,7 +76,7 @@ static int button_map(int keycode)
 
 void button_init_device(void)
 {
-    const char * const input_devs[] = {
+    const char * const input_devs[NR_POLL_DESC] = {
         "/dev/input/event0",
         "/dev/input/event1",
         "/dev/input/event2"
@@ -84,7 +84,7 @@ void button_init_device(void)
 
     for(int i = 0; i < NR_POLL_DESC; i++)
     {
-        int fd = open(input_devs[i], O_RDWR | O_CLOEXEC);
+        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
 
         if(fd < 0)
         {