Questions tagged [gpu]

Use for questions about the Broadcom VideoCore IV Graphics Processing Unit included in all Raspberry Pis.

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1answer
35 views

How do I set my gpu_split?

My Emulation Station keeps crashing saying I need to make sure my gpu_split is set high enough and/or switch back to carbon theme. Can someone help me dial this in? Any thoughts or suggestions are ...
2
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1answer
41 views

Getting OpenGL ES Framebuffer back to CPU Memory

I've started learning how to use OpenGL ES, and am trying to do some general purpose computing using the Pi's GPU. I've got it mostly working, but I'm hung up on the last step: getting a framebuffer ...
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0answers
23 views

Where is the GPU firmware loaded into?

According to cursory explanations of the booting process and software such as this, the small second stage bootloader on the SD card enables the GPU to access its firmware on the SD card and load it. ...
0
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1answer
62 views

Simulating OpenCL on a Raspberry Pi using Python

Is it possible to run code on a Raspberry Pi which simulates the use of OpenCL? I am developing code on a computer which is capable of using OpenCL, and am testing this code remotely on a Raspberry ...
2
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1answer
1k views

Can Raspbery Pi 4 hardware decode 4k@60hz H.265 10bit video?

I have seen it has H.265 support, but not specifically for 10 bit. Can anyone confirm this?
2
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0answers
126 views

Raspberry Pi Model 4 - Which nonfree parts remain?

As the Raspberry Pi Model 4 was released today, I reckon it's time to update this question. I'm aware of the fact that a lot of effort was put into writing usable free software GPU drivers as stated ...
1
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1answer
37 views

DIfference betwenn vc_dispmanx and vc_vchi_dispmanx?

I'm using vc_dispmanx as a display engine and noticed the presence of vc_vchi_dispmanx library who looks quite close to vc_dispmanx. Dispmanx seems to be a broadcom proprietary alternative to openGL, ...
1
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0answers
14 views

How to display numer of QPUs on screen?

I'm using the QPU library created by mn416 on GitHub (https://github.com/mn416/QPULib) to run a sample code on Raspberry Pi 3B I need to display the number of QPUs utilised by the GCD algorithm. I'm ...
2
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1answer
187 views

TensorFlow on a ClusterHat

Has anyone experience of running distributed AI on the Cluster Hat using Pi Zeroes? Specifically, can I run TensorFlow on a Cluster HAT ideally using the GPUs on the PiZeros as well as on the ...
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0answers
58 views

Kernel error : [drm] Resetting GPU

I am using an app which is using the vc4-drivers. Sometimes videos freeze for an instant, and I see a kernel message saying : [drm] Resetting GPU After that, some font are no more displayed but the ...
-6
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1answer
74 views

Issues with PI and faster VC4 alternatives [closed]

I am aware that there has been alot of questions about using dedicated Nvidia or AMD GPUs with the Pi (I have asked a few of them). But ARM (mali core ) and Vivante among other companies appear to ...
1
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1answer
184 views

Use a raspberry pi as a GPU for another raspberry pi

I have 2 Pis, a original B+ and a 3. The B+ was used every day as a desktop PC for 4 years with overclocking, so it is pretty worn.So now I use the 3 as a desktop and try to run DOS games in DOSbox on ...
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1answer
459 views

Use Pi as simple GPU for PC?

I have seen some many examples of connecting an external GPU to the PI but I want know if the reverse is possible whereby the RPI GPU can be accessed via a PC. The use case is to use the PI as a poor ...
3
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1answer
69 views

Accessing GPU memory content

I'm currently working with advanced picamera parameters. A new functionnality to come is the "lens shading correction", a RGGB array that modify the image generated by the camera in order to ...
1
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0answers
96 views

Raspberry Pi processing power [closed]

I've never worked with Raspberry Pi's, but I want to make some cute interactive shaders to put around the house and I was wondering if I could use a Raspberry Pi. I just wanted to know what one is ...
0
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1answer
205 views

Is there a way to drive the display via HDMI from a systemd service

When my Raspberry PI starts it will start a process using systemd. At this point the display of the PI will be the standard PIXEL desktop. This process does not run as root. What I am looking for is ...
0
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1answer
427 views

Frequency bands from FFT (audio visualizer)

I'm currently working on an audio visualizer running on a 64x64 LED matrix, and some tests showed that the Pi1 is totally capable of doing that. I'm receiving raw PCM audio data using PortAudio, and I ...
10
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3answers
9k views

WebGL does not work properly on Raspberry Pi Chromium Browser

I have a problem with WebGL on Raspberry Pi 3's Chromium browser. I did the settings required but nothing happened. Here is my information Device : Raspberry Pi 3 OS : Linux raspberrypi 4.9.80-v7+ #...
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0answers
1k views

Is there a way to check out the GPU usage (how busy it is) on a RPi3? [duplicate]

I have a Raspberry Pi 3 Model B and would like to know how busy the GPU gets when I run certain tests to determine whether it would be possible for me to do certain things. I see that the GPU is a bit ...
4
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1answer
452 views

Raspberry Pi 3 on Android Things OS for 40 inch display (Graphics Issue)

I am working on a project where I need to run videos on a 38"-40" inch LED TV. Mp4 (720p) videos don't run as seamlessly as needed. It is not the worst in the world but I can see that it is missing ...
1
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1answer
528 views

Show multiple HD streams at once on raspberry pi?

We have a situation where we have a large number of incoming HD video streams which we would like to monitor in a way similar to this wall of monitors each showing 16 channels. This can probably be ...
3
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1answer
4k views

Unable to set GPU memory split on Raspberry Pi Zero W

I have looked everywhere (both on and off StackExchange) for this but cannot get an answer: I have a Raspberry Pi Zero W, which has 512MB of RAM total. I am running it headless, so I want to ...
0
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1answer
904 views

Overclocking GPU on raspberry pi 2 model B?

I'm trying to overclock the GPU on my raspberry pi 2, but I can't seem to find out how. Also, there's no setting for it in config.txt? Does anyone know where I might be able to find this setting (...
0
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1answer
516 views

Interfacing pygame with dispmanx - performance

I'm working on a graphical application, made for console mode, and facing some performance issues when working with large resolution (1920px wide here). One part of the display, a video background, ...
2
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0answers
484 views

How to force GPU memory to 0 on a headless server [duplicate]

Is there any way to force the shared memory to 0? I'm running Jessie on a pi3 (and a pi2 and a few zero-w's) as a headless server and only ever access it via SSH or a WebUI for certain services. I ...
1
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1answer
1k views

How will leaving the default GPU memory setting at 64 affect my installed packages

I left my default GPU setting at 64. Will this affect my installed packages in a negative way? I have a raspberry pi 3 and I am getting the hang of things so if there is a better setting I would like ...
2
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2answers
517 views

Why does Raspberry PI use GPU for loading bootloaders and configuration

There is a great explanation of the boot process - What is the boot sequence? But I can't understand why GPU is responsible for doing all that work. Could someone explain this decision? I can't ...
8
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1answer
2k views

Chromium tab crashes if mp4 video with GPU acceleration

I maintain a distro that runs chromium called FullePageOS. I added gpu acceleration, but now mp4 video crashes the chromium tab when its viewed (mpeg works). How can I fix this? Alternatively how do ...
0
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1answer
750 views

Compile Raspivid from userland

I downloaded the userland repository from https://github.com/raspberrypi/userland and I wanted to compile just RaspiVid.c file. It's because I wanted to use the RaspiVid.c code in my project. But i ...
13
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3answers
9k views

Raspberry Pi 3 has less than 1GB memory available at OS level

I don't know if it is a critical issue or not. But, I need to get rid of the question marks in my mind. I recently purchased a Raspberry Pi 3 board and while I was playing with it, I realized that ...
2
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2answers
3k views

Fatal Error: GLES2/gl2.h: No such file or directory

I'm trying to install Urho3D on RPi 3. (GPU = 768 MB) I installed all the essential dependencies. All the steps went fine. Until this error which occurred during the final make step: [ 56%] Building ...
3
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2answers
1k views

eglGetDisplay() fails on RaspBerry 3

When called on a PI3, eglGetDisplay(EGM_DEFAULT_DISPLAY) stops the program (tried with some test programs like hello_triangle2) and displays this message: * failed to add service - already in use ? ...
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0answers
294 views

What should Pi 3 CPU/GPU split be for command line boot to run MJPG-Stream

The Raspberry Pi 3 - now has 1GB RAM, and older docs have always recommended 128M GPU split for most of the video streaming apps I've looked at - but a lot of them refer to 512M RAM limit in the older ...
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1answer
19k views

Raspberry PI 3 Increase Gpu Memory to 944 [closed]

I use Raspberry PI 3 and wnat to get more GPU memory to work. I overclock my PI to get more performance because I use it for home Apache/PHP/MySQL server, Access Point and somethimes play music and ...
2
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1answer
1k views

300 MHz (3D core) / 400 MHz (VideoCore IV) difference?

For the Raspberry Pi 3 it's mentioned here that the GPU has a 400 MHz (VideoCore IV subsystem) part and/or a 300 MHz (3D core) part. BCM2837 runs most of the VideoCore IV subsystem at 400MHz and ...
2
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1answer
13k views

Pi 3 GPU overclocking ability

As far as I am aware the Pi 3's CPU is currently not overclockable, its maximum clock speed is set at 1.2GHz. But what about overclocking the GPU? Is it even possible? And would I see performance ...
4
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1answer
180 views

Is there way get the GPU-load average per second?

I am interested to get the GPU-load average over, for example, an interval of one second. Alas, I was unable to find a direct way to get this information with the current API or tools ( vcgdb or ...
1
vote
1answer
113 views

Why does audio playback seem to depend on GPU memory?

I encountered a really odd behaviour with my Raspberry Pi B+, running a slightly modified version of Raspbian with a PiTFT screen from Adafruit. Because the screen cannot access the GPU I dialed down ...
3
votes
1answer
2k views

Using GPU to decode QRCODE

I'm using a raspberry pi compute module and my question is : Can we use the GPU to decode QRCODE ? I am using my own function inspired by the one from QRTOOLS and by doing so the timing is divided by ...
1
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1answer
2k views

Temperature differences between CPU & GPU

So recently I was interested in CPU and GPU temperatures and did some work displaying the temperatures in real time on a page and also recording the temperatures on a graph using rrdtool (which is ...
6
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1answer
153 views

GPU Unified Memory?

Is it possible to access the memory the GPU is allocated on the CPU? For instance if I'm running a 3d application and I wish to edit a lookup table which is in a texture, is it possible to access the ...
7
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5answers
52k views

How to connect a graphic card to Raspberry pi?

I want a way to connect a graphic card like nvidia or amd to raspberry pi do you think has a way to do that?
8
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1answer
2k views

Differences of Raspberry Pi models in GPU computation?

I know the publication Biosignal PI, an Affordable Open-Source ECG and Respiration Measurement System which uses Raspberry Pi A+ / B+ as a component isolated by ADums, since RP is not itself a medical ...
3
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1answer
349 views

How do I view gpu / h.264 block usage?

Normaly I can get this infromation from psensor but on the pi the only monitors i have access to are cpu and ram usage.
3
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1answer
1k views

How to display a GPU surface on a afafruit TFT screen?

I'm playing with a PiTFT Plus display on a Raspberry Pi 2 using the Adafruit modified version of Raspian Jessie for this screen. The display looks ok for most things, but I'd like to play a video ...
3
votes
2answers
1k views

How do I read the GPU temperature in C?

I am making a graph on the temperature using a NTC resistor and also by reading the CPU temperature, however I'd also like to read the GPU temperature. I read this answer explaining briefly how to ...
2
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0answers
394 views

Maximise GPU usage on a headless Raspberry Pi

I have a headless Raspberry Pi 2 model B and my goal is to maximise the heat output from the CPU/GPU IC. I've successfully maxed the 4-core CPU by running 4 instances of: yes > /dev/null & ...
0
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1answer
260 views

Applications that can utilize raspberry pi 2 Model B's GPU

Are there raspbian compatible applications that can utilize the GPU of the Raspberry PI other than omxplayer?
3
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1answer
868 views

Memory split - How much is the GPU responsible for?

I am using my Pi2 to run some Python scripts that are heavily use the CSI camera (being pulled with the picamera module), being processed with OpenCV, and draw a GUI to screen (using the PyGame module)...
5
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2answers
1k views

Persistent rainbow test pattern

I've got an install of arch linux on my B+, but the test pattern is showing in the upper-right corner of the screen even well after the OS is fully booted. It disappears every now and then, but comes ...