I have an issue with my Rpi4 and my screen. I just installed a Raspian version on my SD card and I can see the starting of my Rpi4 (with all the lines) but I lost the signal of my screen just after. I can access to my Rpi with SSH but I would like to keep the screen in case of problem.
I tried to plug in both of the small HDMI port without any change.
My screen is a Dell brand (model S2421HS) and works well.
Could you please help me to resolve this problem ?
Many thanks.
Smilorel
Related
When I use neopixel (WS2812B, 60 LEDs) on my Rpi 4B the sound from the Raspberry Pi itself stops working (the one i get from HDMI still works, but since I usually don't have a Monitor attached, I need an alternative). I use pulseaudio, which I already tried to make systemwide, but that doesn't seem to work. My OS is Manjaro Linux for RPi.
If you have any idea how to fix this, please tell me. Thanks in advance.
I'm developing a simple Xamarin Form using VS2019 and Oreo as simulated android.
I would like to use my USB Logitech Webcam 200 in order to simulate phone camera.
This basically to avoid the deploymnet of the app in the phone with USB and save time.
I've configured the ADM adding hw.camera property and enabling it. Than i've tried to set hw.back.camera to webcam0 and hw.front.camera to none, but when i open camera in the emulated device it gives an error and camera app crash, also my app doesn't work.
I've tried to check the log and mainly i've found: E/CamDev#3.2-impl(1393): open: cannot open camera 0!
My webcam is good and drivers are installed on my win10 (i use it regularly with Skype and other apps).
I also tried with VS2017 in my PC and also tried in another PC with VS2019.
Any idea?
Thank you.
After I searched for this issue and did not find a solution yet, I will ask here:
I have a Windows 10 computer with Arduino IDE 1.8.5 installed.
When I try to connect my Arduino Industrial 101, it is not possible to select the COM port in the IDE. Additionally, it isn't even shown in the device manager as "unknown device" as e.g. Arduino COM port doesn't work or Arduino doesn't get recognized state.
Before anyone asks:
-I ran the installer as administrator
-The device drivers are installed (At least they were ticked in the installer programm)
-I have this issue on a second computer (Windows 7 with Arduino IDE 1.8.5), too
Does anyone have a solution for this issue?
EDIT: I tried again with the NodeMCU: The IDE shows COM port 7 in the information area on the lower right but when uploading I get a "Failed to open COM7" error. So, it seems to be a general IDE issue...
Ok, I found the issue... You won't believe me but either it was a broken cable or a cable that does not have enough power supply somehow. Strangely, this was the official cable from the Arduino package I got. My Samsung mobile cable saved the day^^
I want to create some multi screen (scenes) Java FX GUI app for Raspberry Pi 3B with 800x480 display (Official Raspberry Pi Touch Screen of 7 Inch).
I have set GPU to 128M.
As i switch between screens in the Java FX application, GPU memory usage increases, and free memory gets smaller and smaller and display turns black at the end and i get the error saying "glGetError 0x505"
I am monitoring GPU memory with following command:
sudo vcdbg rloc
Where does the memory go? Has any body faced such issue? Please someone help me out?
I am trying to download code to my littleBits Arduino module on IDE software. I am not able to find the port whenever I am trying to download the image to the board. Is this an internal issue, or an issue with my Arduino board?
You need to check if the arduino serial driver is properly installed in device manager. If arduino serial port is available in Ports then you can download program through IDE
For visual help: https://www.youtube.com/watch?v=4HqXAmV_Ock
Make sure you have proper drivers for your board. In Arduino IDE make sure you are selecting the proper target ie, littleBits Arduino board.
If you are using the Linux system you can use dmesg to see if your system detected the device properly.
If you are using windows system use device manager to make sure your device is properly connected.
Has it ever worked? Did it work for a while then stop?
Reason I ask, I had a problem where the Little Bit suddenly stopped accepting new code. Whenever I tried to download, the Arduino IDE started reporting Unknown USB Device.
Turned out, we had bricked the device. I blogged my steps for recovery here.
Check tools>ports and see if any are available, try them all, (check
while the board is connected)
if none are available check device manager under com ports there should be your device listed if not the you need to reinstall the drivers.
also check if the board is connected correctly (i.e. the connection cord is working properly)