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26

Short answer: It doesn't "switch" and you can't disable the Intel IGP. Long answer: From a hardware point of view the Intel IGP is always handling image output to the laptop's LCD screen. The NVIDIA GPU copies rendered graphics into the Intel IGP's frame buffer (which resides in system memory) when it is active. The Optimus software makes certain programs ...


14

I figured out a workaround for this, if you create a hard-link to chrome.exe in the same directory, you can set a profile for that executable independently. C:\Program Files (x86)\Google\Chrome\Application>mklink /H gpu-chrome.exe chrome.exe Hardlink created for gpu-chrome.exe <<===>> chrome.exe You'll need to run cmd.exe in administrator ...


7

According to NVIDIA, chrome and firefox both have been disabled from using the Nvidia GPU by design. This is a death blow to WebGL in web browsers on optimus laptops and I have no idea why they decided to do this. "Radium3D said: I have an ASUS N53SV laptop which features GPU switching and I have an issue with 326.80 drivers not allowing Firefox or ...


6

Process Explorer can show GPU usage. It is not shown by default, right click the columns and select "Select Columns" then use the dialog that comes up to add them. While it won't show which GPU, the process using the most GPU resources is likely on the discrete one. A common task that uses the GPU is DWM (Desktop Window Manager).


6

With my Latitude E6520 with Intel HD Graphics 3000, NVIDIA NVS 4200M, and Windows 7 Enterprise, I can use the NVIDIA Control Panel to force a specific processor per-application or globally. Try either: Right clicking on the Desktop and selecting NVIDIA Control Panel Navigating to the Control Panel and searching for NVIDIA Control Panel If you don't have ...


4

What does it do? It "intelligently" switches between the NVidia GPU and the Integrated GPU in a system. This is to save power. If you are surfing the web, reading your email, there is no need to be using the more powerful NVidia GPU. This would shorten the charge life of your battery, requiring you to recharge it sooner... if you were using it all the ...


4

Ok, so it turns out that I don't need to use the developer drivers to compile OpenCV after all! I had somehow messed up my software sources such that I wasn't updating from ppa:ubuntu-x-swat/x-updates any more. When I fixed that I was able to update my NVIDIA drivers to 304.43 from 295.49. I think that might have been the critical factor for getting OpenCV ...


4

I am not familiar with this particular laptop, but there is very often an option in the BIOS to specify either Optimus graphics, or to force either the Intel or Nvidia card to be dominant. That would completely disable the one chipset.


4

A virtual machine does not get direct access to your hardware. The hypervisor emulates hardware, what hardware that is emulated depends on which hypervisor you are using. The Vmware Compatibility Guide includes details about exactly what Guest Operating systems are supported. Windows 8 is not on the list. For supported guest operating systems VMware ...


4

Okay, I found the fix, someone else posted it on askubuntu: http://askubuntu.com/questions/125040/after-installation-of-bumblebee-i386-opengl-apps-stopped-working If you haven't yet installed bumblebee, simply install libgl1-mesa-glx:i386 before you install bumblebee and you should be fine. If you have already installed bumblebee, install ...


4

Giving the guest full GPU access is probably not possible. If a virtual machine had direct access to your GPU, Bad ThingsTM would happen because sharing memory between two effectively different computers is not a thing; pointers and addresses and whatnot would be very different between them. (No consumer-available card supports servicing two computers at ...


4

So after a lengthy process of many different methods I finally stumbled upon one that works: This is for a fresh install of Linux Mint 17.1 (Rebecca) update completely sudo apt-get update & sudo apt-get upgrade Add 'nomodeset' to the grub loader i.e. sudo nano /etc/default/grub should look like this: GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 ...


3

The reason why you need a dedicated video output is that there is no way the host OS can currently access the output framebuffer of the card assigned to the guest OS. VT-d restricts the host from accessing/memory mapping the graphics memory directly. Normally, a modified driver (Nvidia Optimus or Bumblebee on Linux) exposes the results of a window running ...


3

After a lot of research, I finally found the reason for this. Apparently, Fermi-based GPUs do not support DirectX12 yet. "[They] will gain support for DirectX 12 ... later this year". Hopefully, this won't take too long.


3

From this post: From NVIDIA Control Panel 3D Settings->Manage 3D Settings Tab "Global setttings" Preferred Graphics Processor Select : High performance NVIDIA rocessor Alternatively, you could check if you can set the Nvidia card as the preferred graphics card for the game you're using. You could try what is described here: Go to the NVIDIA ...


3

The model number N12P indicates that it is an Nvidia Optimus (less PR centric information) system. This means that there are two GPUs: one integrated with the CPU, and an Nvidia circuit that kicks in when the software decides that it is needed. The Nvidia circuit on the Lenovo T420s with Nvidia Optimus is specified as Nvidia NVS 4200M, as you say. The ...


3

found it myself, it's Nvidia Inspector, it can override nvidia optimus and force applications to nvidia GPU on all processes. note: when I find answers to my own questions I often get downvotes, but whatever. somebody may look for it and it may be useful for someone in the future.


3

Almost all Core in chips have intel HD graphics onboard, but the circuitry to actually use that isnt' always implemented by the chipset used. Quad core Core i7 mobile chips don't have integrated graphics chips at all, but dual-core i7 and all i3 and i5 chips have it. The circuitry to switch between the integrated and dedicated graphics is non-trivial, so not ...


3

I've heard good things about Bumblebee as a way to control Optimus GPUs in Linux. Unfortunately, there is not much in the way of official support from NVIDIA for Optimus in Linux.


3

I don't understand why DWM is different from any other 3D application, and hence why it has to be special. It's a bit painful, but you might want to take a look at where all this information is stored (it might be in the C:\ProgramData\NVIDIA Corporation\Drs folder) and then try modifying it with a hex editor to see if you can enable the combo box. If ...


3

Your question is actually pretty difficult to answer since it mostly depends on particular laptop and how its cooling work. I for example have only a discrete video card an never had any problems with overheating. In properly designed laptops, the cooling system is supposed to be able to measure the temperature and adjust the fan speed with no OS ...


3

The Asus K43SJ does not use the integrated Intel HD graphics (whether it's on the CPU or not), so you're not going to be able to use Optimus. I came to this conclusion by the fact that the Intel Graphics are mentioned nowhere on the support page for that model, and the fact that they ONLY offer the nVidia driver (where as the K53SC does provide both the ...


3

Your laptop Graphics card is limited to 2 displays you may want to look in to a usb to vga adapter You won't get great performance game / HD video wise on that display, but it will do the trick for web/e-mail/chat.


3

You might read this question (and its answers), which I posed in May 2011 and have not yet received a satisfactory answer for. The short version is: Optimus allows mixed-mode rendering by allowing the powerful Nvidia GPU to write (e.g. output video) directly into the frame buffer of the Intel IGP. Based on my experience with optimus, it is possible that the ...


3

If you activate the dedicated graphics the graphics driver starts to redirect all incomming instructions to the NVidia chip. The computed image data is then written into the memory of the Intel GMA which does nothing else than to take care of the output. It does not render anything at all. I'm not sure if this satisfies your question. Ask if you wan't to ...


2

Yes, the switch is supposed to be instantaneous. You shouldn't even know it's happening.


2

When rendering to your laptop's integrated screen, both video cards will (or at least can) be active at the same time. Optimus begins to run into problems when multiple outputs are involved, though. My personal experience has been that only the integrated screen's framebuffer is shared by the two GPUs, and external connectors such as HDMI or DisplayPort are ...


2

There is no Windows 8 drivers for nVidia optimus cards, your computer will probably not boot to Windows 8 after you install the drivers or if you upgrade from Windows 7 with the drivers installed. My m14x does not boot into Windows 8 with the Windows 7 drivers installed, the screen just flickers on and off. No safe mode, no low resolution mode, nothing. ...


2

You might have a look at this patch to the Nvidia drivers : Hybrid PhysX mod v1.03 / v1.04ff, which seems to be related to your problem. Better read the comments as well. Towards the end, one comment confirms v1.04ff as working for version 270.61 that you are using. If you decide to try it out, first take some good backups.


2

To my knowledge, most VMs use a special guest driver to emulate graphics; in some cases, passing the host GPU's capabilities via the aforementioned guest driver. VirtualBox's user manual describes how VirtualBox (in particular) emulates 2D/3D acceleration. https://www.virtualbox.org/manual/ch04.html#guestadd-video



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