I have 2 GPU's in my netbook. How do I know which one I'm actually using at any given moment?
I've just gone through a hell of a time trying to get my discrete graphics to work in Ubuntu and answering this questions was constantly a challenge, since the lspci method mentioned earlier can sometimes say that both are
I think the following command should give you an indication of your active chip:
$ glxinfo|egrep "OpenGL vendor|OpenGL renderer" OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile
For me this is telling me that my intel graphics are running the show. If you're using an nvidia chip, and you're using the
bumblebee package, you can put
optirun in front of that line and it should tell you that you're running the NVidia chip (optirun is basically telling the computer to use the discrete chip to run whatever command follows, but everything else is still using the integrated chip)
$ optirun glxinfo|egrep "OpenGL vendor|OpenGL renderer" OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GT 555M/PCIe/SSE2
glxheads also tells you some useful information about which graphics card is in use (mostly repeats glxinfo in a more compact and easy to read form tho), and it gives you a nice rendering of a rotating triangle.
To check which GPU is currently in command (that means which is an active VGA controller) type in
lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA
Any controller with
[VGA controller] at the end is your currently active GPU. The others are switched off. In the following example the Intel card is active while the nVidia one is not in use:
00:02.0 VGA compatible controller : Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller : NVIDIA Corporation GF108 [GeForce GT 540M] [10de:0df4] (rev ff) (prog-if ff)
23Um... so what does it mean if both cards have
VGA controllerat the end? Nov 11, 2014 at 5:38
100:02.0 VGA compatible controller : Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller : NVIDIA Corporation GK106GLM [Quadro K2100M] [10de:11fc] (rev a1) (prog-if 00 [VGA controller]) what does it mean? Jul 9, 2015 at 11:36
1Maybe you're using SLI? Jul 9, 2015 at 11:58
3in my case both has that at the end: 00:02.0 VGA compatible controller : Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller : NVIDIA Corporation GP106M [GeForce GTX 1060 Mobile] [10de:1c20] (rev a1) (prog-if 00 [VGA controller]) Oct 21, 2018 at 11:28
1In my case, both are end with [VGA controller], so how can I know the exact one?– BonnNov 25, 2020 at 3:50
On Ubuntu 15.10, after I installed
nvidia-352 and the GPU seems to work:
shows something like:
Note how it shows:
GPU 0 - (NVS 5400M)
NVS 5400M is my GPU model.
Then if I fire
glxgears, the "GPU Utilization" goes to > 90%.
So I expect that if you had multiple GPUs, you could see how much each one was being used at a time.
What is nvidia-352 exactly? Is is a bunch of drivers or just a driver for a specific GPU?– cosbor11May 10, 2018 at 5:27
nvidia-352is the version of the driver / Ubuntu package n, each version supports many GPUs as listed on the official website: nvidia.com/Download/driverResults.aspx/90279/en-uames NVS 5400M is the GPU model: en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units May 11, 2018 at 7:16
2This answer is Nvidia-specific, but the OP didn't specify a vendor. What about AMD? I have an AMD laptop with integrated and dedicated GPUs.– unfaMay 5, 2021 at 14:54
@unfa sorry, I don't know how to do it there, let me know if you find a more general method, I don't like lock-in either. Also, I like your YouTube channel :-) May 5, 2021 at 15:05
This gave me what I wanted. This command shows the list of GPUs present on your machine. This might help you figure which are active ones.
got the command from thread here: Ubuntu Box with multiple NVIDIA GPU Cards | devtalk.nvidia.com
1anybody figured out how to find the free GPUs out of the ones returned by this command?– pcko1Jan 21, 2020 at 16:02
Just curious, will this command list an Intel integrated GPU if you decided to disable your Nvidia GPU?– kasNov 14, 2020 at 18:11
1This only lists Nvidia GPUS and gives no indication if active for desktop or not..– RichieHHApr 12, 2021 at 22:57
This answer is Nvidia-specific, but the OP didn't specify a vendor. What about AMD? I have an AMD laptop with integrated and dedicated GPUs.– unfaMay 5, 2021 at 14:54
Again, this is Nvidia specific. Not a usable answer. Feb 25, 2022 at 17:23
Which OS are you using? If you use lspci on most linux machines you get a list of your pci devices, just grep for graphics devices and it should pop up both of them. After that just check out the config on each of them, you should see details of up/on/active or something to that nature.
1ubuntu 11.04. and lspci is showing all two gpu's. Jul 11, 2011 at 3:41
nvidia-smi in the terminal. Then check for the percentage of usage. That will indicate which GPU is in use.
nvidia-smi is very useful, but at times I've found that it doesn't always include everything. It seems when processes crash they aren't always listed.
sudo lsof /dev/nvidia* has always worked for me. It will also work without
sudo, but will only show processes owned by you. If you are working on a multiuser machine or are using docker, you will probably get better results with
If you see a discrepancy between the 2 commands, you may want to consider
killing the extra processes found with
I found another method, just in case anyone needs to detect the model of your NVIDIA graphics card and the recommended driver.
I got this from here: https://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linux
sudo cat /sys/kernel/debug/vgaswitcheroo/switch
Discrete card (DIS) will be Off (or DynOff) when not in use. Integrated card (IGD) is always energized (Pwr).