diff --git a/src/userland/hid/include/hid.h b/src/userland/hid/include/hid.h
index acdd352..2488ff7 100644
--- a/src/userland/hid/include/hid.h
+++ b/src/userland/hid/include/hid.h
@@ -7,6 +7,7 @@
     uint32_t serviceId;
     uint32_t deviceId;
     uint32_t normalFunction;
+    uint32_t interval;
     void *buffer;
     ListElement *inputGroups;
 } HIDDevice;

diff --git a/src/userland/hid/include/hid.h b/src/userland/hid/include/hid.h
index acdd352..2488ff7 100644
--- a/src/userland/hid/include/hid.h
+++ b/src/userland/hid/include/hid.h
@@ -7,6 +7,7 @@
     uint32_t serviceId;
     uint32_t deviceId;
     uint32_t normalFunction;
+    uint32_t interval;
     void *buffer;
     ListElement *inputGroups;
 } HIDDevice;
diff --git a/src/userland/hid/main.c b/src/userland/hid/main.c
index 1947580..dbed8fc 100644
--- a/src/userland/hid/main.c
+++ b/src/userland/hid/main.c
@@ -268,8 +268,7 @@
         foreach (device->inputGroups, InputGroup *, group, {
             handleGroup(group, &report, &bit);
         });
-        // TODO: sleep for at least endpoint->interval?
-        sleep(10);
+        sleep(device->interval);
     }
 }
 
@@ -283,6 +282,8 @@
     device->inputGroups = NULL;
     printf("registered a new HID device, dumping report descriptor:\n");
     uint32_t totalBits = parseReportDescriptor(report, &device->inputGroups);
+    uint32_t getIntervalFunction = getFunction(serviceId, "hid_interval");
+    device->interval = request(serviceId, getIntervalFunction, usbDevice, 0);
     fork(hidListening, device, 0, 0);
     return 0;
 }

diff --git a/src/userland/hid/include/hid.h b/src/userland/hid/include/hid.h
index acdd352..2488ff7 100644
--- a/src/userland/hid/include/hid.h
+++ b/src/userland/hid/include/hid.h
@@ -7,6 +7,7 @@
     uint32_t serviceId;
     uint32_t deviceId;
     uint32_t normalFunction;
+    uint32_t interval;
     void *buffer;
     ListElement *inputGroups;
 } HIDDevice;
diff --git a/src/userland/hid/main.c b/src/userland/hid/main.c
index 1947580..dbed8fc 100644
--- a/src/userland/hid/main.c
+++ b/src/userland/hid/main.c
@@ -268,8 +268,7 @@
         foreach (device->inputGroups, InputGroup *, group, {
             handleGroup(group, &report, &bit);
         });
-        // TODO: sleep for at least endpoint->interval?
-        sleep(10);
+        sleep(device->interval);
     }
 }
 
@@ -283,6 +282,8 @@
     device->inputGroups = NULL;
     printf("registered a new HID device, dumping report descriptor:\n");
     uint32_t totalBits = parseReportDescriptor(report, &device->inputGroups);
+    uint32_t getIntervalFunction = getFunction(serviceId, "hid_interval");
+    device->interval = request(serviceId, getIntervalFunction, usbDevice, 0);
     fork(hidListening, device, 0, 0);
     return 0;
 }
diff --git a/src/userland/usb/include/usb.h b/src/userland/usb/include/usb.h
index 9277af1..efc3f14 100644
--- a/src/userland/usb/include/usb.h
+++ b/src/userland/usb/include/usb.h
@@ -70,7 +70,7 @@
     void (*setupHID)(void *, uint32_t, void *);
     void (*doNormal)(void *, void *, uint32_t);
     void (*command)(void *, uint8_t, uint8_t, uint16_t, uint8_t);
-    void (*configureEndpoint)(void *, UsbEndpointDescriptor *);
+    uint32_t (*configureEndpoint)(void *, UsbEndpointDescriptor *);
 } UsbHostControllerInterface;
 
 typedef struct {
@@ -82,7 +82,7 @@
     void *data;
     UsbHostControllerInterface *interface;
     uint32_t portIndex;
-    uint32_t id;
+    uint32_t id, interval;
 } UsbSlot;
 
 extern uint32_t serviceId;

diff --git a/src/userland/hid/include/hid.h b/src/userland/hid/include/hid.h
index acdd352..2488ff7 100644
--- a/src/userland/hid/include/hid.h
+++ b/src/userland/hid/include/hid.h
@@ -7,6 +7,7 @@
     uint32_t serviceId;
     uint32_t deviceId;
     uint32_t normalFunction;
+    uint32_t interval;
     void *buffer;
     ListElement *inputGroups;
 } HIDDevice;
diff --git a/src/userland/hid/main.c b/src/userland/hid/main.c
index 1947580..dbed8fc 100644
--- a/src/userland/hid/main.c
+++ b/src/userland/hid/main.c
@@ -268,8 +268,7 @@
         foreach (device->inputGroups, InputGroup *, group, {
             handleGroup(group, &report, &bit);
         });
-        // TODO: sleep for at least endpoint->interval?
-        sleep(10);
+        sleep(device->interval);
     }
 }
 
@@ -283,6 +282,8 @@
     device->inputGroups = NULL;
     printf("registered a new HID device, dumping report descriptor:\n");
     uint32_t totalBits = parseReportDescriptor(report, &device->inputGroups);
+    uint32_t getIntervalFunction = getFunction(serviceId, "hid_interval");
+    device->interval = request(serviceId, getIntervalFunction, usbDevice, 0);
     fork(hidListening, device, 0, 0);
     return 0;
 }
diff --git a/src/userland/usb/include/usb.h b/src/userland/usb/include/usb.h
index 9277af1..efc3f14 100644
--- a/src/userland/usb/include/usb.h
+++ b/src/userland/usb/include/usb.h
@@ -70,7 +70,7 @@
     void (*setupHID)(void *, uint32_t, void *);
     void (*doNormal)(void *, void *, uint32_t);
     void (*command)(void *, uint8_t, uint8_t, uint16_t, uint8_t);
-    void (*configureEndpoint)(void *, UsbEndpointDescriptor *);
+    uint32_t (*configureEndpoint)(void *, UsbEndpointDescriptor *);
 } UsbHostControllerInterface;
 
 typedef struct {
@@ -82,7 +82,7 @@
     void *data;
     UsbHostControllerInterface *interface;
     uint32_t portIndex;
-    uint32_t id;
+    uint32_t id, interval;
 } UsbSlot;
 
 extern uint32_t serviceId;
diff --git a/src/userland/usb/main.c b/src/userland/usb/main.c
index 8093bad..d443b0f 100644
--- a/src/userland/usb/main.c
+++ b/src/userland/usb/main.c
@@ -62,7 +62,7 @@
         for (uint32_t i = 0; i < interface->endpointCount;) {
             UsbEndpointDescriptor *endpoint = nextInterface;
             if (endpoint->descriptorType == 5) {
-                slot->interface->configureEndpoint(slot->data, endpoint);
+                slot->interval = slot->interface->configureEndpoint(slot->data, endpoint);
                 i++;
             }
             nextInterface += endpoint->size;
@@ -143,6 +143,11 @@
     // data is returned to buffer
 }
 
+uint32_t hidInterval(uint32_t slotId) {
+    UsbSlot *usbSlot = listGet(usbSlots, slotId & 0xFFFF);
+    return usbSlot->interval;
+}
+
 void initialize() {
     serviceId = getServiceId();
     // xhciEvent will carry data corresponding to the data in the xhci event
@@ -150,6 +155,7 @@
     xhciEvent = createEvent("xhciEvent");
     loadFromInitrd("hid");
     createFunction("hid_normal", (void *)hidNormal);
+    createFunction("hid_interval", (void *)hidInterval);
     for (uint32_t i = 0;; i++) {
         uint32_t class = getDeviceClass(i, 0);
         if (!class) {

diff --git a/src/userland/hid/include/hid.h b/src/userland/hid/include/hid.h
index acdd352..2488ff7 100644
--- a/src/userland/hid/include/hid.h
+++ b/src/userland/hid/include/hid.h
@@ -7,6 +7,7 @@
     uint32_t serviceId;
     uint32_t deviceId;
     uint32_t normalFunction;
+    uint32_t interval;
     void *buffer;
     ListElement *inputGroups;
 } HIDDevice;
diff --git a/src/userland/hid/main.c b/src/userland/hid/main.c
index 1947580..dbed8fc 100644
--- a/src/userland/hid/main.c
+++ b/src/userland/hid/main.c
@@ -268,8 +268,7 @@
         foreach (device->inputGroups, InputGroup *, group, {
             handleGroup(group, &report, &bit);
         });
-        // TODO: sleep for at least endpoint->interval?
-        sleep(10);
+        sleep(device->interval);
     }
 }
 
@@ -283,6 +282,8 @@
     device->inputGroups = NULL;
     printf("registered a new HID device, dumping report descriptor:\n");
     uint32_t totalBits = parseReportDescriptor(report, &device->inputGroups);
+    uint32_t getIntervalFunction = getFunction(serviceId, "hid_interval");
+    device->interval = request(serviceId, getIntervalFunction, usbDevice, 0);
     fork(hidListening, device, 0, 0);
     return 0;
 }
diff --git a/src/userland/usb/include/usb.h b/src/userland/usb/include/usb.h
index 9277af1..efc3f14 100644
--- a/src/userland/usb/include/usb.h
+++ b/src/userland/usb/include/usb.h
@@ -70,7 +70,7 @@
     void (*setupHID)(void *, uint32_t, void *);
     void (*doNormal)(void *, void *, uint32_t);
     void (*command)(void *, uint8_t, uint8_t, uint16_t, uint8_t);
-    void (*configureEndpoint)(void *, UsbEndpointDescriptor *);
+    uint32_t (*configureEndpoint)(void *, UsbEndpointDescriptor *);
 } UsbHostControllerInterface;
 
 typedef struct {
@@ -82,7 +82,7 @@
     void *data;
     UsbHostControllerInterface *interface;
     uint32_t portIndex;
-    uint32_t id;
+    uint32_t id, interval;
 } UsbSlot;
 
 extern uint32_t serviceId;
diff --git a/src/userland/usb/main.c b/src/userland/usb/main.c
index 8093bad..d443b0f 100644
--- a/src/userland/usb/main.c
+++ b/src/userland/usb/main.c
@@ -62,7 +62,7 @@
         for (uint32_t i = 0; i < interface->endpointCount;) {
             UsbEndpointDescriptor *endpoint = nextInterface;
             if (endpoint->descriptorType == 5) {
-                slot->interface->configureEndpoint(slot->data, endpoint);
+                slot->interval = slot->interface->configureEndpoint(slot->data, endpoint);
                 i++;
             }
             nextInterface += endpoint->size;
@@ -143,6 +143,11 @@
     // data is returned to buffer
 }
 
+uint32_t hidInterval(uint32_t slotId) {
+    UsbSlot *usbSlot = listGet(usbSlots, slotId & 0xFFFF);
+    return usbSlot->interval;
+}
+
 void initialize() {
     serviceId = getServiceId();
     // xhciEvent will carry data corresponding to the data in the xhci event
@@ -150,6 +155,7 @@
     xhciEvent = createEvent("xhciEvent");
     loadFromInitrd("hid");
     createFunction("hid_normal", (void *)hidNormal);
+    createFunction("hid_interval", (void *)hidInterval);
     for (uint32_t i = 0;; i++) {
         uint32_t class = getDeviceClass(i, 0);
         if (!class) {
diff --git a/src/userland/usb/xhci/xhci.c b/src/userland/usb/xhci/xhci.c
index efb6123..6475e34 100644
--- a/src/userland/usb/xhci/xhci.c
+++ b/src/userland/usb/xhci/xhci.c
@@ -133,7 +133,7 @@
     doXhciCommand(slot, 0x00, 9, configValue, 0);
 }
 
-void xhciConfigureEndpoint(SlotXHCI *slot, UsbEndpointDescriptor *endpoint) {
+uint32_t xhciConfigureEndpoint(SlotXHCI *slot, UsbEndpointDescriptor *endpoint) {
     uint8_t endpointNumber = endpoint->address & 0xF; // never 0
     uint8_t direction = endpoint->address >> 7;
     uint8_t endpointIndex = (endpointNumber)*2 - 1 + direction;
@@ -142,7 +142,6 @@
         &inputContext->deviceContext.endpoints[endpointIndex];
     endpointContext->maxPrimaryStreams = 0;
     endpointContext->interval = endpoint->interval;
-    printf("interval: %i\n", endpointContext->interval);
     endpointContext->errorCount = 3;
     endpointContext->endpointType =
         direction << 2 | endpoint->attributes & 3;
@@ -156,6 +155,7 @@
     inputContext->inputControl.addContextFlags |= 1 << (endpointIndex + 1);
     inputContext->deviceContext.slot.contextEntryCount = MAX(
         inputContext->deviceContext.slot.contextEntryCount, endpointIndex);
+    return (1 << endpointContext->interval) / 8;
 }
 
 UsbHostControllerInterface xhci = {