Blurry picture on second monitor with MB Pro 13"

My wife has a brand new MB Pro 13". When we attach an external monitor to it (with a digital DVI cable), we have the following problem: When the computer's lid is closed, everything is fine, the picture is crisp. However, when we open the lid and both displays are turned on, the picture on the second monitor gets slightly blurred.
When I do the same setup with my 15" MB Pro, both computers have a crisp picture.

A blurry picture means that the resolution is incorrect. Go to the Display preference pane and make sure that the two monitors have the native resolution set properly. If the two monitors have different native resolutions, one will always be blurry in mirrored mode. If the displays are not mirrored, it's possible that one will reset to the wrong resolution on opening/closing the lid.

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Frank
{------------ Please click the "White Kudos" Thumbs Up to say THANKS for helping.
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This is a user supported forum. I am a volunteer and I don't work for HP.
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http://www.ebay.com/itm/Apple-Mac-A1006-DVI-to-ADC-Converter-LCD-Display-Adapter -w-Power-Cord-/330799049978?
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If has in presentation mode, with 2 monitors I need to print text in a second monitor.
#define _WIN32_WINNT 0x500
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
int main() {
HWND desktop = GetDesktopWindow();
HDC hdc = GetWindowDC(desktop);
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GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
while (true)
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LPPOINT point = NULL;
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SelectObject(hdc, newpen);
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LineTo(hdc, 1600, 550 );
//this block works for draw line in second monitor
TextOut(hdc, 1500, 300, TEXT("Text of text out"), 17); // this works too
//But if I'm use gdiplus only print things on the primary screen
Gdiplus::Graphics g(hdc);
Pen pen(Gdiplus::Color(0, 0, 255), 2);
g.DrawLine(&pen, 1500, 0, 1700, 600);// dont work
g.DrawLine(&pen, 0, 0, 1200, 600);// work, but is in the primary screen
FontFamily fontFamily(L"Times New Roman");
Font font(&fontFamily, 24, FontStyleRegular, UnitPixel);
SolidBrush brush(Color(255, 0, 0, 255));
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(1600.0f, 300.0f), &brush); // dont work
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(500.0f, 300.0f), &brush); // work, but is in the primary screen
Gdiplus::GdiplusShutdown(m_gdiplusToken);
return 0;

Hi Bhash, Thanks for help.
You can show to me an code example?
I'm tryied with this way:
#include
#define _WIN32_WINNT 0x500
#include
#include
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
HDC hdc;
BOOL CALLBACK MonitorEnumProcCallback(_In_ HMONITOR hMonitor, _In_ HDC DevC, _In_ LPRECT lprcMonitor, _In_ LPARAM dwData) {
MONITORINFOEX info;
info.cbSize = sizeof(MONITORINFO);
BOOL monitorInfo = GetMonitorInfo(hMonitor, &info);
cout << "info szDevice" << info.szDevice << endl;
if (monitorInfo) {
hdc = CreateDC(NULL, info.szDevice, NULL, NULL);
return TRUE;
int main() {
HWND desktop = GetDesktopWindow();
HDC DevC = GetDC(desktop);
BOOL b = EnumDisplayMonitors(DevC, NULL, MonitorEnumProcCallback, 0);
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GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
while (true)
HPEN newpen;
LPPOINT point = NULL;
newpen = CreatePen(PS_COSMETIC, 20, RGB(255, 0, 0));
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MoveToEx(hdc, 1500, 500, point);
LineTo(hdc, 1600, 550);
//this block works for draw line in second monitor
TextOut(hdc, 1500, 300, TEXT("Text of text out"), 17); // this works too
//But if I'm use gdiplus only print things on the primary screen
Gdiplus::Graphics g(hdc);
Pen pen(Gdiplus::Color(0, 0, 255), 2);
g.DrawLine(&pen, 1500, 0, 1700, 600);// dont work
g.DrawLine(&pen, 0, 0, 1200, 600);// work, but is in the primary screen
FontFamily fontFamily(L"Times New Roman");
Font font(&fontFamily, 24, FontStyleRegular, UnitPixel);
SolidBrush brush(Color(255, 0, 0, 255));
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(1600.0f, 300.0f), &brush); // dont work
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(500.0f, 300.0f), &brush); // work, but is in the primary screen
Gdiplus::GdiplusShutdown(m_gdiplusToken);
return 0;
and I'm tryied too with
BOOL b = EnumDisplayMonitors(NULL, NULL, MonitorEnumProcCallback, 0);
and dosent work for any case, dont print anything in the any monitors
I'm tryied too with this mode:
#include <iostream>
#define _WIN32_WINNT 0x500
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
HDC hdc;
int main() {
DISPLAY_DEVICE dd;
ZeroMemory(&dd, sizeof(dd));
dd.cb = sizeof(dd);
for (int i = 0; EnumDisplayDevices(NULL, i, &dd, 0); i++)
DEVMODE lpDevMode;
hdc = CreateDC(dd.DeviceName, dd.DeviceString, NULL, &lpDevMode);
ULONG_PTR m_gdiplusToken;
// Initialize GDI+
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
std::cout << "hdc: " << hdc << std::endl; //this print 00000000000000000000
while (true)
HPEN newpen;
LPPOINT point = NULL;
newpen = CreatePen(PS_COSMETIC, 20, RGB(255, 0, 0));
SelectObject(hdc, newpen);
MoveToEx(hdc, 200, 500, point);
LineTo(hdc, 300, 550);
//this block dont work
TextOut(hdc, 600, 300, TEXT("Text of text out"), 17); // dont work
//But if I'm use gdiplus only print things on the primary screen
Gdiplus::Graphics g(hdc);
Pen pen(Gdiplus::Color(0, 0, 255), 2);
g.DrawLine(&pen, 1500, 0, 1700, 600);// dont work
g.DrawLine(&pen, 0, 0, 100, 600);// dont work
FontFamily fontFamily(L"Times New Roman");
Font font(&fontFamily, 24, FontStyleRegular, UnitPixel);
SolidBrush brush(Color(255, 0, 0, 255));
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(1600.0f, 300.0f), &brush); // dont work
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(500.0f, 300.0f), &brush); // dont work
Gdiplus::GdiplusShutdown(m_gdiplusToken);
return 0;
ando Not was printed, dont print anything in the any monitors.

[SOLVED] Extended monitor on a second monitor with Gnome

I was just trying gnome. I have a second monitor (connected to the VGA port). When I configure it as a second monitor extending my desktop, the windows freeze or move erratically and there is no possibility to click / write into them any longer. The same phenomenon appears if I configure the dual screen in gnome (via the settings menu) or if I use the command line xrandr ( xrandr --output LVDS1 --primary --mode 1280x800 --pos 0x0 --output VGA1 --pos -1284x-251 --mode 1280x1024 ). Exactly the same problem appears with Ubuntu 11.04 (tested from the live CD).
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Last edited by JuseBox (2010-03-24 12:45:37)

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I have a new Macbook Pro and have it hooked up to an external monitor and an USB Apple keyboard in my home office. How am I able to power the laptop on without opening the display and have it display only on my external display? When I am at home I'd like to use my external monitor and not my Macbook display.

Having the computer with the lid closed is dangerous cause even when just browsing the web with flash content it starts heating up and I've heard about casess of melted displays. Besides, the wifi strength is reduced and you can't use the keyboard and the trackpad.
So, for Lion users, it's possible to just use the external display with the lid open:
1. In Mission Control Preferences activate one Hot Corner to put the display to sleep.
2. Connect the external monitor and plug in the power source to your computer.
3. Move the mouse to the Hot Corner to put the display to sleep.
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I just want a simple 20" or 22" monitor as a 2nd screen for my Macbook Pro 2008 Unibody
Can I use any monitor as long as it says "DVI"? and then get the mini-display > DVI adaptor to run it from the macbook?
For example any from this list here would be ok : http://computers.shop.ebay.co.uk/Desktop-PCs-Monitors-/171957/i.html?trkparms=65%253A2%257C66%253A1%257C39%253A1&rt=nc&_nkw=dvi%20monitor&_catref=1&_ dmpt=UK_Computing_ComputerComponents_Monitors&_sc=1&_sop=2&_trksid=p3286.c0.m14. l1581&pgn=2
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pitchfork wrote:
Would a VGA monitor work with the mini display > VGA adaptor? or is this not as good quality?
It might, but VGA is an older analog standard and DVI is digital, so DVI should produce a better picture.
Sorry for all the questions! Also is DVI-D still compatible (whatever that means?)
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http://en.wikipedia.org/wiki/DigitalVisualInterface

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Hi guys
I am sorry I am new with Apple and need a help from you guys. I have a MacBook Pro (retina) and connected two monitors to it, using Thunderbolt plugs.
It works fine when I close the lid and one monitor gets the Apple OS and the other I run Windows (VMWare). The problem starts when I remove the power
from it and run using the battery. Monitors got blank display and I have to plug the power back to the MAC, in order to get the OS back. I've tried any combination on the System Preferences/Display and Energy Saver. No go!
Any ideas?
Thank you!

I had the same issue a few months ago when I tried connecting to external monitor, it is only possible to run external displays from a Macbook Pro while the power cable is attached, if you try and connect to external display without having the charger attached the external display will flash your desk top for a second and then your Macbook Pro will go to sleep. Hence connect your charger every time you wish to connect to external display, its not a problem with your Macbook Pro, it's just the way of Apple. Hope that helps.

Blurry picture on second monitor with MB Pro 13"

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