I have an application that creates a window using SDL2.
It works fine if an HDMI cable is connected.
Once I unplug the HDMI cable and access the machine via VNC, the window does not show up. No exceptions are thrown. Opening windows for other applications works as expected via VNC.
I removed the SDL_Init(SDL_INIT_VIDEO); call. It works with and without it if an HDMI cable is connected. Otherwise, it fails with No available displays.
How can this issue be fixed or debugged?
Related
iPhone With Windows 10 Enterprise Via Bluetooth Low Energy (GATT)
Bluetooth pairing is requested when logging into Windows even though pairing has already been completed. After that, even if the pairing is done, pairing will be asked again at the next login to Windows every time when the Windows is restarted.
Our iOS app acts as a Bluetooth central and the other as a peripheral (Bluetooth Driver on Windows).
when the app is trying to connect using Bluetooth Low Energy (GATT) at step 5 as mentioned below, new pairing is requested from windows every time when the PC is restarted.
Steps to reproduce the problem:
log into Windows and connect the app to the Windows computer
See the paring request on Windows and on iPhone,
Pair on both Windows and iPhone
Turn off the Bluetooth toggle on iPhone and then turn it on
Restart windows and see the login screen
Start the app on your iPhone and try to connect,
See the paring request on iPhone
With the above steps, if this issue is not reproducible, try rebooting the iPhone instead of changing the Bluetooth toggle at S4.
we also observe the iPhone device is receiving this log from Windows:
default 15:38:27.555377+0530 SpringBoard Received request to activate alertItem: <SBUserNotificationAlert: 0x105916a90; title: Bluetooth Pairing Request; source: bluetoothd; pid: 88>
We observed that looks like the issue reproduces more consistently when the windows restarts or reboots.
On the pairing request alert dialogue on iPhone, If I press "cancel", the app disconnects from the peripheral (Windows). If I press "pair", the peripheral nothing happens. However, Windows continues sending me pairing requests whenever the machine is restarted or rebooted.
We did not observe this behaviour with the Android Device. Windows and Android work without any problem (i.e. No new Pairing is requested once the device is paired in any situation).
In the below screenshots, we could see that the iPhone is already paired in Windows Bluetooth Settings but the Paring is requested from Windows on iPhone to pair again and in the background, our app is successfully connected to Windows using Bluetooth Low Energy (GATT).
Environment:
Windows details
Edition Windows 10 Enterprise
Version 22H2
Installed on 5/5/2021
OS build 19045.2486
Experience Windows Feature Experience Pack 120.2212.4190.0
iPhone OS - iOS 15.6.1 and 16.1.1
Is this a known bug with Windows 10 Enterprise?
Is there any way to get around this issue?
Sample Code to reproduce the problem on iOS:
Our iOS app acts as a Bluetooth central and the other as a peripheral (Bluetooth Driver on Windows)
Initializes the central manager with a specified delegate and dispatch queueself.cbManager = [[CBCentralManager alloc] initWithDelegate:self queue:bleManagerQueue];
Scans for peripherals that are advertising services to discover other Bluetooth devices, passing in the UUID of the service it’s searching for.
[self.cbManager scanForPeripheralsWithServices:(NSArray<CBUUID *> *)serviceUUIDs options:(NSDictionary<NSString *,id> *)options;]];
When the central manager discovers a peripheral with a matching service UUID, The method saves the peripheral as the property discoveredPeripheral and calls connect to it.[self.cbManager connectPeripheral:
[[self.currentConnection device] peripheral] options:nil];
Step 3, when trying to establish a connection to a peripheral, pairing is requested even though pairing has already been completed. After that, even if the pairing is done, pairing will be asked again at the next logon to Windows.
Is this a known bug with Windows 10 Enterprise?
Is there any way to get around this issue?
iPhone Already Paried
Pairing Request on iPhone from Windows
Is this a known bug with Windows 10 Enterprise?
Is there any way to get around this issue?
Working in Ubuntu, I'm debugging a Flutter app on my Android phone while I code it. So far that works fine, but I would like to see the phone screen on my pc for comfort. I know an emulator would do the trick, but for performance issues I used my phone instead.
So far I installed scrcpy, and managed to show the phone screen on the pc via WiFi debugging. The problem comes when I try to run both connections at the same time. If I have the WiFi scrcpy connection on, it disconects right when VS Code connects with the device via USB. And viceversa, if the USB debugging is on, attempting to start scrcpy kills the Flutter debug.
I am looking for a way to install noobs raspbian from network. I mean i do not want to connect an hdmi TV, mouse or keyboard.
What i read in documentation is to download noobs (full version) and copy files into sd card. I have read i need to change something in recovery.cmdline file (Adding vncinstall word).
This works for the first raspberry boot: I can see installation screen through VNC. I have choose "Raspbian + pixel" installation. Then, I can see the progress bar.
But at the end of the installation, when the raspberry reboots, i have no VNC, neither ssh or telnet server and at this time i need to plug an HDMI TV, mouse and keyboard.
Do you know how i can automaticly launch a VNC or SSH server without having to plug a TV and keyboard ?
Thanks
I have a Android device. How to sync with Eclipse for execute code directly in mobile not in emulator.
Just simply connect your phone via USB cable to your computer and run your application. Window pops up and you can choose then between connected devices. Make sure you enabled debugging mode in your device.
I am developing an Android app for a class I'm taking. I've been using the emulator to date. I know what to see if it runs on the real HW.
My PC runs Windows 7. I downloaded the latest google/Android USb driver. I have enabled the USB Debugging feature on the tablet already. When I plug the tablet into the PC via USB, the PC doesn't seem to see the tablet at all.
What do I need to do to get these two devices to see one another.
thanks,
wk
HI, I'm using superpad 3, and just have adb connection over ethernet, all you need is type cmd: "connect your.pad.ip" and then Eclipse will see your device.