Clamshell Mode Not Working With Acer V223W

I recently got an Acer V223W 22" monitor to use at the office with my MBP. Using the DVI port, it works well, but I cannot get clamshell mode to work. I close the lid, and when I awaken the computer with a mouse click, I know it wakes up because I can hear the audio, but the Acer display does not light up.
Any suggestions as to how to fix this are welcome!

This may be relevant: 2011 MacBook Pro Repair Extension Program for Video Issues.

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Hi Mike,
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Hello,
I am trying to write and application that uses the MicroBlaze which runs the MicroC-OS-II. I am also trying to use the UARTLITE in interrupt mode.
Currently I can use the UARTLITE in interrrupt mode if I run a standalone package that is without MicroC-OS-II.m
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* (c) Copyright 2002-2013 Xilinx, Inc. All rights reserved.
* This file contains confidential and proprietary information of Xilinx, Inc.
* and is protected under U.S. and international copyright and other
* intellectual property laws.
* DISCLAIMER
* This disclaimer is not a license and does not grant any rights to the
* materials distributed herewith. Except as otherwise provided in a valid
* license issued to you by Xilinx, and to the maximum extent permitted by
* applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
* FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
* IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
* MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
* and (2) Xilinx shall not be liable (whether in contract or tort, including
* negligence, or under any other theory of liability) for any loss or damage
* of any kind or nature related to, arising under or in connection with these
* materials, including for any direct, or any indirect, special, incidental,
* or consequential loss or damage (including loss of data, profits, goodwill,
* or any type of loss or damage suffered as a result of any action brought by
* a third party) even if such damage or loss was reasonably foreseeable or
* Xilinx had been advised of the possibility of the same.
* CRITICAL APPLICATIONS
* Xilinx products are not designed or intended to be fail-safe, or for use in
* any application requiring fail-safe performance, such as life-support or
* safety devices or systems, Class III medical devices, nuclear facilities,
* applications related to the deployment of airbags, or any other applications
* that could lead to death, personal injury, or severe property or
* environmental damage (individually and collectively, "Critical
* Applications"). Customer assumes the sole risk and liability of any use of
* Xilinx products in Critical Applications, subject only to applicable laws
* and regulations governing limitations on product liability.
* THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
* AT ALL TIMES.
* @file xuartlite_intr_example.c
* This file contains a design example using the UartLite driver (XUartLite) and
* hardware device using the interrupt mode.
* @note
* The user must provide a physical loopback such that data which is
* transmitted will be received.
* MODIFICATION HISTORY:
* <pre>
* Ver Who Date Changes
* 1.00a jhl 02/13/02 First release
* 1.00b rpm 10/01/03 Made XIntc declaration global
* 1.00b sv 06/09/05 Minor changes to comply to Doxygen and coding guidelines
* 2.00a ktn 10/20/09 Updated to use HAL Processor APIs and minor changes
* for coding guidelnes.
* </pre>
/***************************** Include Files *********************************/
#include "xparameters.h"
#include "xuartlite.h"
#include "xintc.h"
#include "xil_exception.h"
/************************** Constant Definitions *****************************/
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
#define UARTLITE_DEVICE_ID XPAR_UARTLITE_2_DEVICE_ID
#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
#define UARTLITE_INT_IRQ_ID XPAR_INTC_0_UARTLITE_2_VEC_ID
* The following constant controls the length of the buffers to be sent
* and received with the UartLite device.
#define TEST_BUFFER_SIZE 100
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
int UartLiteIntrExample(u16 DeviceId);
int SetupInterruptSystem(XUartLite *UartLitePtr);
void SendHandler(void *CallBackRef, unsigned int EventData);
void RecvHandler(void *CallBackRef, unsigned int EventData);
/************************** Variable Definitions *****************************/
XUartLite UartLite; /* The instance of the UartLite Device */
XIntc InterruptController; /* The instance of the Interrupt Controller */
* The following variables are shared between non-interrupt processing and
* interrupt processing such that they must be global.
* The following buffers are used in this example to send and receive data
* with the UartLite.
u8 SendBuffer[TEST_BUFFER_SIZE];
u8 ReceiveBuffer[TEST_BUFFER_SIZE];
* The following counters are used to determine when the entire buffer has
* been sent and received.
static volatile int TotalReceivedCount;
static volatile int TotalSentCount;
* Main function to call the UartLite interrupt example.
* @param None
* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful
* @note None
int main(void)
int Status;
xil_printf("Started\n");
* Run the UartLite Interrupt example, specify the Device ID that is
* generated in xparameters.h.
Status = UartLiteIntrExample(UARTLITE_DEVICE_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
return XST_SUCCESS;
* This function does a minimal test on the UartLite device and driver as a
* design example. The purpose of this function is to illustrate
* how to use the XUartLite component.
* This function sends data and expects to receive the same data through the
* UartLite. The user must provide a physical loopback such that data which is
* transmitted will be received.
* This function uses interrupt driver mode of the UartLite device. The calls
* to the UartLite driver in the handlers should only use the non-blocking
* calls.
* @param DeviceId is the Device ID of the UartLite Device and is the
* XPAR_<uartlite_instance>_DEVICE_ID value from xparameters.h.
* @return XST_SUCCESS if successful, otherwise XST_FAILURE.
* @note
* This function contains an infinite loop such that if interrupts are not
* working it may never return.
int UartLiteIntrExample(u16 DeviceId)
int Status;
int Index;
* Initialize the UartLite driver so that it's ready to use.
Status = XUartLite_Initialize(&UartLite, DeviceId);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
* Perform a self-test to ensure that the hardware was built correctly.
Status = XUartLite_SelfTest(&UartLite);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
* Connect the UartLite to the interrupt subsystem such that interrupts can
* occur. This function is application specific.
Status = SetupInterruptSystem(&UartLite);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
* Setup the handlers for the UartLite that will be called from the
* interrupt context when data has been sent and received, specify a
* pointer to the UartLite driver instance as the callback reference so
* that the handlers are able to access the instance data.
XUartLite_SetSendHandler(&UartLite, SendHandler, &UartLite);
XUartLite_SetRecvHandler(&UartLite, RecvHandler, &UartLite);
* Enable the interrupt of the UartLite so that interrupts will occur.
XUartLite_EnableInterrupt(&UartLite);
* Initialize the send buffer bytes with a pattern to send and the
* the receive buffer bytes to zero to allow the receive data to be
* verified.
for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
SendBuffer[Index] = Index;
ReceiveBuffer[Index] = 0;
* Start receiving data before sending it since there is a loopback.
XUartLite_Recv(&UartLite, ReceiveBuffer, TEST_BUFFER_SIZE);
* Send the buffer using the UartLite.
XUartLite_Send(&UartLite, SendBuffer, TEST_BUFFER_SIZE);
* Wait for the entire buffer to be received, letting the interrupt
* processing work in the background, this function may get locked
* up in this loop if the interrupts are not working correctly.
while ((TotalReceivedCount != TEST_BUFFER_SIZE) ||
(TotalSentCount != TEST_BUFFER_SIZE)) {
for (Index = 0; Index < TEST_BUFFER_SIZE; Index++)
xil_printf("%d",ReceiveBuffer[Index]);
* Verify the entire receive buffer was successfully received.
for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
if (ReceiveBuffer[Index] != SendBuffer[Index]) {
return XST_FAILURE;
return XST_SUCCESS;
* This function is the handler which performs processing to send data to the
* UartLite. It is called from an interrupt context such that the amount of
* processing performed should be minimized. It is called when the transmit
* FIFO of the UartLite is empty and more data can be sent through the UartLite.
* This handler provides an example of how to handle data for the UartLite,
* but is application specific.
* @param CallBackRef contains a callback reference from the driver.
* In this case it is the instance pointer for the UartLite driver.
* @param EventData contains the number of bytes sent or received for sent
* and receive events.
* @return None.
* @note None.
void SendHandler(void *CallBackRef, unsigned int EventData)
TotalSentCount = EventData;
* This function is the handler which performs processing to receive data from
* the UartLite. It is called from an interrupt context such that the amount of
* processing performed should be minimized. It is called data is present in
* the receive FIFO of the UartLite such that the data can be retrieved from
* the UartLite. The size of the data present in the FIFO is not known when
* this function is called.
* This handler provides an example of how to handle data for the UartLite,
* but is application specific.
* @param CallBackRef contains a callback reference from the driver, in
* this case it is the instance pointer for the UartLite driver.
* @param EventData contains the number of bytes sent or received for sent
* and receive events.
* @return None.
* @note None.
void RecvHandler(void *CallBackRef, unsigned int EventData)
TotalReceivedCount = EventData;
* This function setups the interrupt system such that interrupts can occur
* for the UartLite device. This function is application specific since the
* actual system may or may not have an interrupt controller. The UartLite
* could be directly connected to a processor without an interrupt controller.
* The user should modify this function to fit the application.
* @param UartLitePtr contains a pointer to the instance of the UartLite
* component which is going to be connected to the interrupt
* controller.
* @return XST_SUCCESS if successful, otherwise XST_FAILURE.
* @note None.
int SetupInterruptSystem(XUartLite *UartLitePtr)
int Status;
* Initialize the interrupt controller driver so that it is ready to
* use.
Status = XIntc_Initialize(&InterruptController, INTC_DEVICE_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
* Connect a device driver handler that will be called when an interrupt
* for the device occurs, the device driver handler performs the
* specific interrupt processing for the device.
Status = XIntc_Connect(&InterruptController, UARTLITE_INT_IRQ_ID,
(XInterruptHandler)XUartLite_InterruptHandler,
(void *)UartLitePtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
* Start the interrupt controller such that interrupts are enabled for
* all devices that cause interrupts, specific real mode so that
* the UartLite can cause interrupts through the interrupt controller.
Status = XIntc_Start(&InterruptController, XIN_REAL_MODE);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
* Enable the interrupt for the UartLite device.
XIntc_Enable(&InterruptController, UARTLITE_INT_IRQ_ID);
* Initialize the exception table.
Xil_ExceptionInit();
* Register the interrupt controller handler with the exception table.
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler)XIntc_InterruptHandler,
&InterruptController);
* Enable exceptions.
Xil_ExceptionEnable();
return XST_SUCCESS;

Hello,
I have a KC705 board, with Microblaze on it. My software is Witten above the operating system of µC/OS-II.I am trying to write multi task ie. task1 and task2. Application that uses the MicroBlaze which runs the MicroC-OS-II.
I am using the UARTLITE able to run hello world program successfully is with MicroC-OS-II.I read the documentations, On how the OS handles multi task, but I am little confused on how to implement..(i am new to RTOS). Please suggest me or share the any documents, any example codes.
~thanks
ASHIOK H

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I have a summer 2007 15 "MacBook Pro and since upgrading to mavericks clamshell mode doesn't work anymore. Now closing the lid doesn't do anything and the laptop screen stays on and the computer doesn't sleep. I saw a blog entry which gave a terminal code to boot with the internal screen disabled. This is not the ideal way and secondly the computer still thinks the screen in use and as a result still is producing the desktop associated with the internal display.
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http://support.apple.com/kb/HT3964

Clamshell Mode Not Working With Acer V223W

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