Unable to detect DirectX device

[ElleRagu]

Are you running the game on full screen or windowed mode i had that directx error when i was alt+tab when in full screen now that i play in windowed no more crashes but i did notice my performence go down a little.

[addie]

We've tried everything more than once. Finally after three consecutive evenings on the phone with the alienware tech he sent me an email with the following reasons for this issue and the reason it can't be fixed:

It’s a combination of features that cause this issue:

1) Directx 11 (Originally release with windows 7)

2) Final Fantasy XIV(Previous versions of the series doesn’t report an issue like this one)

3) HD 6000 card(AMD/Raedeon/ATi)series & NVidia 500 card series(The game doesn’t synchronized with optimums -Nvidia’s technology- )

So at this point I'm not sure where the fix should come from, but it looks like maybe ffxiv could do something about the synchronization issue. If anyone else has any other ideas please share them

[Coldfire]

Well did you try to disable DWM yet? Worked for everyone else with optimus.

[Hasiano]

i seem to get it the most running through the tunnels back and forth to/from gridania, both is full screen and windowed mode, updated directx, my graphics drivers and tried everything i can think of.

my sys info:

-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

Operating System Microsoft Windows 7 Ultimate Edition 32bit (build 7600)
Processor Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz
Number of Processors Logical Core Count 4 Physical Core Count 4
BIOS Phoenix - AwardBIOS v6.00PG
Language English (Regional Setting: English)
Physical Memory 3070.555MB
Virtual Memory 2047.875MB
Page File 6139.387MB
Storage C:\ Hard Disk Drive Total Disk Space 97.559GB Free Disk Space 16.544GB
Storage D:\ Hard Disk Drive Total Disk Space 368.104GB Free Disk Space 337.179GB
DirectX Version DirectX 11
Graphic Device(s) NVIDIA GeForce GT 240
+Device \\.\DISPLAY1
+Chip GeForce GT 240
+Maker NVIDIA
+Video Memory 978.563 MB
+Shared Video Memory 1279.277 MB
+DAC Type Integrated RAMDAC
+Display Mode 1280 x 1024 (32 bit) (60Hz)
+Driver nvd3dum.dll,nvwgf2um.dll,nvwgf2um.dll
+Driver Version 8.17.0012.7533
+Driver Date 25/05/2011 07:09:05
+Driver Language English
+Vertex Shader 3.0
+Pixel Shader 3.0
+Vertex Texture Supported
Sound Device(s) Speakers (Realtek High Definition Audio)
+Device ID {571DD823-BF02-4E5A-8FBD-E0F8136ABB6C}
+Device Name RTKVHDA.sys
+Driver Version 6.00.0001.5859
+Driver Language English
+Driver Date 23/05/2009 02:03:40
Sound Device(s) Realtek Digital Output (Realtek High Definition Audio)
+Device ID {592C461F-A963-4386-A9AE-DC22958F5ED6}
+Device Name RTKVHDA.sys
+Driver Version 6.00.0001.5859
+Driver Language English
+Driver Date 23/05/2009 02:03:40
Input Device(s) {6F1D2B60-D5A0-11CF-BFC7444553540000}
+Name Mouse
+Notes Axis 3 Button 3 Field of View 0
Input Device(s) {6F1D2B61-D5A0-11CF-BFC7444553540000}
+Name Keyboard
+Notes Axis 0 Button 128 Field of View 0
Input Device(s) {B455FEC0-81A0-11E0-8001444553540000}
+Name USB Optical Mouse
+Notes Axis 0 Button 0 Field of View 0


-=-=-=-=-=-=- Application Information -=-=-=-=-=-=-

AVG
CPU Meter
Clock
Unable to detect DirectX device - Page 2 - Mozilla Firefox


-=-=-=-=-=-=- Install Information -=-=-=-=-=-=-

AVG 2011
Adobe Flash Player 10 Plugin
Adobe Reader X (10.1.0)
Darkspore
Dual-Core Optimizer
Duke Nukem Forever
FINAL FANTASY XI
FINAL FANTASY XI: Chains of Promathia
FINAL FANTASY XI: Rise of the Zilart
FINAL FANTASY XI: Treasures of Aht Urhgan
FINAL FANTASY XI: Wings of the Goddess
FINAL FANTASY XIV
Far Cry
Far Cry 2
GPGNet
Java Auto Updater
Java(TM) 6 Update 26
Microsoft .NET Framework 4 Client Profile
Microsoft .NET Framework 4 Extended
Microsoft Games for Windows - LIVE
Microsoft Games for Windows - LIVE Redistributable
Microsoft Visual C++ 2005 Redistributable
Microsoft Visual C++ 2008 Redistributable - x86 9.0.21022
Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.17
Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.4148
Microsoft Visual C++ 2010 x86 Redistributable - 10.0.40219
Mozilla Firefox 5.0 (x86 en-GB)
NVIDIA 3D Vision Controller Driver
NVIDIA 3D Vision Controller Driver 275.33
NVIDIA 3D Vision Driver 275.33
NVIDIA Control Panel 275.33
NVIDIA Drivers
NVIDIA Graphics Driver 275.33
NVIDIA HD Audio Driver 1.2.23.3
NVIDIA Install Application
NVIDIA PhysX
NVIDIA PhysX System Software 9.10.0514
NVIDIA Stereoscopic 3D Driver
NVIDIA Update 1.3.5
NVIDIA Update Components
OpenOffice.org 3.2
PVSonyDll
PlayOnline Viewer & Tetra Master
Portal
Post Apocalyptic Mayhem
Quake
Quake II
Quake II: Ground Zero
Quake II: The Reckoning
Quake III Arena
Quake III: Team Arena
Quake Mission Pack 1: Scourge of Armagon
Quake Mission Pack 2: Dissolution of Eternity
Realtek High Definition Audio Driver
Spore
Steam
Steel Storm: Burning Retribution
Supreme Commander
Supreme Commander - Forged Alliance
Supreme Commander 2
System Requirements Lab
Team Fortress 2
Universe Sandbox
VLC media player 1.1.4
Warhammer® 40,000™: Dawn of War® II
WinRAR archiver
Windows Live ID Sign-in Assistant

motherboard is a Asus P5N-D, with a nVIDIA nForce 750i SLI chipset, NVIDIA GeForce GT 240 (1024 MB) graphics card, its really getting irritating

[Jiddu_Krishnamurti]

Just found a fix for this issue, but only when it is occurring under certain circumstances.
My game would give me this error and crash whenever I tried to open a program through Windows 7, wherein it would 'dim' the screen and give me a confirmation box, asking me whether or not I'd like to allow the program to "make changes" to my system.
If your game gives you the "unable to detect Directx device" error when your screen 'dims'-out like this, the fix is easy.

Control Panel > User Accounts (and Family Safety) > User Accounts > Change User Account Control Settings.
Once here, set it so that your screen doesn't dim whenever it asks for permission when opening programs.
This fixed my problem, but you could probably also go one step further and entirely disable this notification feature of Windows 7.
Just thought I'd chime in with my success on this front. Best of luck!