All Questions

11
votes
0answers
3k views

How to get touchscreen right click on Raspbian Stretch

I am currently using Raspbian Stretch with a Waveshare 7 inch touchscreen, and I would like to get right click input (preferably with two finger or long touch). There appear to be no solutions for ...
7
votes
0answers
96 views

Cannot Use SPI frequency above 500 kHz

I am running Arch Linux ARM on a Raspberry Pi 2 Model B, and I am attempting to communicate with a TFT display. I am writing a kernel module to interface with the display using SPI, and it works, but ...
7
votes
0answers
808 views

Thermal printer with Raspberry Pi 2 outputs only Chinese chars

Following thermal printer + raspi2 tutorial for printing images (https://learn.adafruit.com/networked-thermal-printer-using-cups-and-raspberry-pi/connect-and-configure-printer), I've already connected ...
6
votes
0answers
452 views

USB OTG on Compute Module 3

Has anyone ever tried configuring the USB of the Compute Module 3 as USB OTG? In the default kernel (Raspbian Stretch - Kernel7), support for usb otg appears to be disabled. Has anyone managed to ...
6
votes
0answers
9k views

How Can I Emulate An x86 CPU on a Raspberry Pi with Qemu?

!!DISCLAIMER!! I am aware that this question has been asked before HERE, but after having followed that question step by step, troubleshooted on my own and having done plenty of research on the ...
5
votes
0answers
270 views

Lxpanel using 100% CPU (1 core)

On my Raspbian 2018-11-13 installation with all updates (sudo apt-get update and sudo apt-get upgrade), I see the CPU graph in the task bar (top right corner) at constant 25%. I opened a terminal and ...
5
votes
0answers
236 views

connmanctl having problem with complex passphrase

The built in WiFi module seems to work fine, as it can connect to both of my open networks I created for testing, i.e. the 2.4GHz, and the 5.0GHz ones. If I set a simple passphrase (i.e. contains ...
5
votes
0answers
110 views

Raspberry as I2C Slave, how to slow down transfer rate?

I have had minor success using the PIGPIO library and interfacing the Pi as an I2C Slave (Using GPIO Pins 18 and 19 as SDA and SCL) with a Campbell CR1000X Datalogger I am encountering a problem ...
5
votes
0answers
247 views

Wi-Fi transfers hang on Raspberry Pi 3

I was trying to transfer a 50 MB file to my Raspberry Pi 3 via samba and I noticed that after few seconds the transfer slows down until it stops, same thing via scp. It starts but after few seconds (5-...
4
votes
0answers
33 views

Multiple USB modems issue with HUB external power

When I connect 6 modems ZTE WCDMA Technologies MSM into USB hub Terminus Technology Inc. Hub everything works fine. Modems are detected as eth0, eth1, eth2, eth3, eth4, eth5 When one more modem is ...
4
votes
0answers
74 views

Custom camera driver

Is it possible to write a driver, say for a OV camera, based on the existing drivers at the RPI git repo? As is I understand, with a datasheet for a sensor it should be possible to write a similar ...
4
votes
0answers
108 views

How does the hardware cause long delays?

I want to write a bit-banging driver for a Raspberry Pi 3. For testing I developed a simple Linux kernel mode driver which toggles a GPIO pin with approx. 1Mhz. Here is the code excerpt. static ...
4
votes
0answers
299 views

Watchdog service doesn't kick /dev/watchdog in OSMC

I have installed watchdog service on OSMC/Raspberry Pi 3. It starts now automatically, but doesn't touch the /dev/watchdog device. How I check this: ls -l /dev/watchdog crw------- 1 root root 10, ...
4
votes
0answers
4k views

Running Selenium & Firefox & geckodriver on Raspberry Pi 2 Model B

I'm trying to run Selenium on my Raspberry Pi 2 Model B but I'm having trouble finding a compatible combination of versions of Selenium, Firefox, and geckodriver. (I've already run sudo apt-get ...
4
votes
0answers
3k views

Chromium scrolling lag on Raspberry Pi 3 Model B running Raspbian Stretch

I received my Raspberry Pi 3 Model B a few days ago, I copied Raspbian Stretch img with dd to 64 GB Samsung EVO card. I am using a HDMI to VGA adapter on a 1920x1080 Samsung monitor. Also, I have ...
4
votes
0answers
709 views

How do I install the DisplayLink driver for Ubuntu on Raspbian?

I have a Raspberry Pi 3 Model B v1.2 with Raspbian Stretch 9.1 as an OS. I have the USB graphics adapter Kensington K33907. How can I proceed to install the DisplayLink driver for Ubuntu on Raspbian? ...
4
votes
0answers
604 views

Android Things (0.5.1) fails to initialize GPU on Raspberry Pi 3 Model B?

I have just set-up a Raspberry Pi 3 with Android Things using the latest developer preview (5.1). It boots and I can run some minimum samples, and the output can be seen normally in a HDMI screen. So, ...
4
votes
0answers
585 views

FT5406 touchscreen sends events but input does not work

I have a Raspi 3B with the official 7" touchscreen attached. The screen works (showed the under-voltage sign when attaching only the screen controller to a 2.1 A power supply, so I'm connecting ...
4
votes
0answers
136 views

Check if a host device is connected to Pi Zero gadget

How can the Pi detect if a host device has been connected, and gather information about that device, when being used as a gadget (such as mass storage). It would be useful if I could detect this ...
4
votes
0answers
807 views

Unable to autosave snes rom (Zelda)

I've added to /opt/retropie/emulators/retroarch/retroarch.cfg: input_enable_hotkey_btn = 8 input_exit_emulator_btn = 9 based on http://nickbartlett.com/retropie-emulationstation-not-saving-game-...
4
votes
0answers
264 views

I2s DAC audio out but USB audio in

I was wondering if anyone could help me. I am trying to set up my Pi 3 to be an assistant (Google or Alexa, etc). I had it set up working fine with the USB mic and the 3.5mm audio out, but I wanted ...
4
votes
0answers
1k views

Can the Compute Module 3 support 240fps from the Pi Camera v2?

The Compute Module 3 supports CAM1 with 4x Lane CSI MIPI as does the official doc for the Sony IMX219 camera module. It has been explained in many places that the reason the standard Raspberry Pi ...
4
votes
0answers
334 views

Is it possible to install Rocks Cluster Distribution on Raspberry Pi?

There are lots of websites about making a supercomputer with Raspberry Pi. Is it possible to install "Rocks Cluster Distribution" on Raspberry to have a more efficient cluster?
4
votes
0answers
6k views

Open Splash Page After Connecting to Wifi Hotspot

I'm using my pi3 to display a local "website" as described here Making a Raspberry Pi 3 accessible w/o configuration via WiFi and static IP/URL. Therefore, I'm creating a hotspot with the pi. This ...
4
votes
0answers
209 views

Extremely slow download, while upload works fine

The download speed on my Pi is somehow almost dead (working in Bytes/sec and then gets stalled). I tried downloading files through wget, download files over LAN using scp, using rsync and yet it's all ...
4
votes
0answers
2k views

Stream video from camera using ffserver?

I'm trying to stream video from the camera module using ffserver. My server configuration is HTTPPort 8090 HTTPBindAddress 0.0.0.0 MaxHTTPConnections 8 MaxClients 4 MaxBandwidth 1000 CustomLog - #...
4
votes
0answers
804 views

Can't connect PS3 controller to Pi using Sixaxis

I am trying to use sixaxis to connect a ps3 controller to my Raspberry Pi. When I run sudo ./sixpair_rpi, I get: Current Bluetooth master: xx:xx:xx:xx:xx:xx Setting master bd_addr to xx:xx:xx:xx:xx:...
4
votes
0answers
1k views

Restart NOOBS downloading process?

I was at university with NOOBS in SD card and my Raspberry. I need to install OpenELEC which is downloaded from Internet. However, it seems that university cable network doesn't provide DHCP or ...
4
votes
0answers
928 views

Full duplex Audio With USB Sound Card

I setup Raspberry Pi with external usb sound blaster sound card. My Goal is to be able to record and play audio simultaneously. I setup and configured it to be the default sound card as follows: sudo ...
4
votes
0answers
818 views

Inateck BTA-CSR4B2 USB Bluetooth 4.0 Adapter not scanning

I bought an Inateck BTA-CSR4B2 USB Bluetooth 4.0 Adapter and plugged it into my Raspberry Pi. Setup was smooth (got bluetooth, blueman, bluez-utils from apt-get), but I can't get any scan results from ...
3
votes
0answers
28 views

is it possible to damage of monitor with hdmi boost?

To make an old Samsung monitor work with my Raspberry Pi (Pi 3 Model B+) I had to set the hdmi_boost option in the /boot/config.txt to 7 (without that it shows green vertical lines, or green snow, ...
3
votes
0answers
106 views

sources.list broken in Raspbian

I have updated the /etc/apt/sources.list file and ended up breaking it. I've restored it to its original contents from my backup as follows deb http://raspbian.raspberrypi.org/raspbian/ stretch main ...
3
votes
0answers
33 views

Not able to ssh into RPI Zero W with raspbian Lite?

I have for weeks now tried to ssh into my RPI zero, and I cannot figure out what is wrong here. I've been using this guide https://desertbot.io/blog/ssh-into-pi-zero-over-usb. The installation ...
3
votes
0answers
60 views

Read/Write LAN9512 EEPROM

We are building a device around the Compute Module 3 and since it needs internet access we decided to go with the LAN9512 that was also used in the Raspberry Pi earlier. The LAN9512 requires an ...
3
votes
0answers
39 views

raspi MIDI in audio out

I have a MIDI controller keyboard, that I want to take with me to a vacation. For some reason I cannot bring a tablet/laptop with me. I still have a Raspberry Pi 2B lying around so I thought it might ...
3
votes
0answers
55 views

Timeout waiting for hardware interrupt during work

(Full logs are also posted here) My RPi3B+ have ArchLinuxARM running on it (armv7h version). Latest kernel and all updates (only packages from official repos + yay installed from AUR). My SD is ...
3
votes
0answers
65 views

Google assistant on RaspberryPi3

I need help as I am stuck doing a project. I followed the tutorial on google developers website " https://developers.google.com/assistant/sdk/guides/library/python/extend/install-hardware" and got the ...
3
votes
0answers
83 views

Bluetooth Blues

I've discovered again that cursing and swearing at inanimate objects doesn't actually improve things, so I'll try posting a question. A couple of months ago I attempted a fairly ambitious project (...
3
votes
0answers
88 views

Android things keeps restarting

Trying to install Android Things OS on RPi3 B V1.2, but before I can -- or shortly after -- I get to the set-up screen, the OS reboots. This happens repeatedly. Rasperian works great under CPU and ...
3
votes
0answers
131 views

How can I install the latest kernel from kernel.org to Arch Linux ARM for Raspberry Pi 3 model B?

I am using Arch Linux on Raspberry Pi 3 model B. I want to install a newer kernel (currently I have 4.14.94-1-ARCH kernel installed) I have downloaded and compiled the mainline kernel 5.0-rc5, which ...
3
votes
0answers
123 views

Are the camera and display connectors of my 3B+ soldered the wrong way around?

I recently purchased a new 3B+ board and although the board board itself is working fine, I can't get the PiNoir camera to work. The camera works fine on an another 3B board. I tried several tricks on ...
3
votes
0answers
382 views

Why doesn't extract-vmlinux work with Raspbian's /boot/kernel*.img?

To monitor if a reboot is necessary, I wanted to compare the version of /boot/kernel*img against the version of the running kernel. To get the kernel version of a compressed linux kernel image (...
3
votes
0answers
361 views

Accelerated Numpy on Pi 3 B+

I'm looking to do some work with NumPy on my Pi 3 B+, and I'm not sure what the deal is with optimization, blas, etc. I installed libatlas using: sudo apt-get install libatlas-base-dev Following ...
3
votes
0answers
555 views

Setting up Pi Zero W Wi-Fi through USB SSH

I am having lots of problems connecting my raspberry pi zero to wifi. I have followed a number of tutorials. 1. What I have tried This was my wpa_supplicant.conf file ctrl_interface=DIR=/var/run/...
3
votes
0answers
727 views

Raspberry PI 3 - Browser, bad performance (Website with HTML5 canvas)

I have encountered a problem while developing a dashboard which is supposed to run on a Raspberry Pi 3. It is a combination of a HTML5 canvas as background to create visuals and some simple elements ...
3
votes
0answers
477 views

Bluetooth PAN on the Pi Zero W

I have the following problem: I want to host a webserver on my Pi Zero W and access it over Bluetooth. To achieve this i tried to use PAN as underlying layer. The first time i followed this post. Most ...
3
votes
0answers
867 views

On-screen keyboard with app integration

I'm aware of matchbox-keyboard, but I'm looking for a more Android or iOS kind of keyboard solution. When selecting a text input, of type alpha or numeric, I would like the appropriate keyboard, text ...
3
votes
0answers
94 views

Is it possible to virtually trigger a GPIO Input pin when nothing is actually connected to it?

I am trying to use incoming MIDI data on my Raspberry Pi 3's USB port to virtually trigger an input GPIO pin. The reason for this is as follows: I'm using the MIDI out port on a Behringer X-32 audio ...
3
votes
0answers
126 views

service for mongodb 3.4 server on SLES 12 SP2 Doesn't start(Raspberry Pi 3)

The link below was the source: https://software.opensuse.org/download.html?project=server:database&package=mongodb It was the only mongodb 3.4 which could be installed correctly but unfortunately ...
3
votes
0answers
2k views

Rasbperry Pi suddenly stopped connecting to WiFi network defined in wpa_supplicant.conf

My Raspberry Pi 3 running Jessie has been automatically connecting to a WiFi network defined in my wpa_supllicant.conf file for a few months without a problem. Two days ago, the Pi stopped connecting ...

15 30 50 per page