Unknown connection error with adb.exe in Android Studio - android-studio

I was trying to test project on a device but got Error:Unable to locate adb within SDK. Using this guide I've tried to reinstall [platform-tools] in SDK manager and added path to SDK library (Windows 7). But that didn't work. Now, after lunching project on a device I have following:
File adb.exe just disappears from the [platform-tools] folder
I get this notification in Event Log:
14:19 Unable to obtain result of 'adb version' 14:25 Executing tasks:
[:app:assembleDebug] 14:25 Adb connection Error:????????? ????
????????????? ???????? ???????????? ??????????? 14:25 Connection
attempts: 1 14:25 Connection attempts: 2 ...
Thanks in advance.

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ADB Connection Error: Unable to create debug bridge

On starting recently fresh installed android studio bumblebee 2021.1.1 patch 2 I get an ADB running error which hereby I attach its screenshot. Please someone tell me what is the problem? I implemented all solutions given to similar cases in stackoverflow without any success.
ADB Error
ADB Connection Error
Unable to create Debug Bridge: Timed out attempting to connect to adb*
* daemon not running; stating now at tcpc5037
* daemon stated successfully
Connected to adb for device monitoring
Sending Tracking request failed!
Adb connection Error: An existing connection was forcibly closed by the remote host
Cannot reach ADB server, attempting to reconnect.

Android Studio emulators not able to connect to adb

I have am Acer Spin 713 Chromebook with an 11th gen Intel I5.
When running on 10th or higher gen Intel CPUs, Android Studio on Chromebooks now supports emulators.
In Android Studio, I can bring up the AVD Manager, and start an emulator. The emulator loads and appears to be running correctly, but I get the following errors in the Android Studio error log:
3:53 PM * daemon not running; starting now at tcp:5037
3:53 PM * daemon started successfully
4:02 PM Adb connection Error:EOF
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Adb connection Error:EOF
4:02 PM Cannot reach ADB server, attempting to reconnect.
4:02 PM Unable to open connection to ADB server: java.io.IOException: Can't find adb server on port 5037, IPv4 attempt: Connection refused, IPv6 attempt: Connection refused
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Adb connection Error:EOF
4:02 PM Unable to open connection to ADB server: java.io.IOException: Can't find adb server on port 5037, IPv4 attempt: Connection refused, IPv6 attempt: Connection refused
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Adb connection Error:EOF
4:02 PM Cannot reach ADB server, attempting to reconnect.
4:02 PM Unable to open connection to ADB server: java.io.IOException: Can't find adb server on port 5037, IPv4 attempt: Connection refused, IPv6 attempt: Connection refused
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Adb connection Error:EOF
4:02 PM Unable to open connection to ADB server: java.io.IOException: Can't find adb server on port 5037, IPv4 attempt: Connection refused, IPv6 attempt: Connection refused
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Adb connection Error:EOF
4:02 PM Cannot reach ADB server, attempting to reconnect.
4:02 PM Failed to start monitoring emulator-5554
4:02 PM Adb connection Error:EOF
I can launch the same emulator from a shell command line, assuming I have ~/Android/Sdk/emulator & ~Android/Sdk/tools in my PATH, in that order, using:
emulator -avd Pixel_3_API_30
The emulator connects to adb, and I can run/debug apps in it with Android Studio.
Any suggestions on how to fix, or debug this?

How to connect real device with android in windows 10

When I connect the real device to the android studio in windows 10 then get an error with 10060 error code.
I follow step this step
I goto my SDK path in a terminal.
enter command adb tcpip 5555
adb connect XXX.XXX.X.XXX:5555
this error gets after step 3.
cannot connect to **XXX.XXX.X.XXX:XXXX**(IP ADDRESS) A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because the connected host has failed to respond. (10060)

ADB rejected shell command (getprop): closed

Using Android Studio and when trying to run a simple demonstration app the emulator I selected starts up but never renders the app. In the event log I see stuff like the following:
2:59 PM Emulator: emulator: WARNING: Host CPU is missing the following
feature(s) required for x86 emulation: SSSE3
2:59 PM Emulator: Hardware-accelerated emulation may not work
properly!
2:59 PM Emulator: qemu-system-x86_64: warning: host doesn't support
requested feature: CPUID.01H:ECX.ssse3 [bit 9]
2:59 PM Emulator: qemu-system-x86_64: warning: host doesn't support
requested feature: CPUID.01H:ECX.sse4.1 [bit 19]
2:59 PM Emulator: qemu-system-x86_64: warning: host doesn't support
requested feature: CPUID.01H:ECX.sse4.2 [bit 20]
2:59 PM ADB rejected shell command (getprop): closed
2:59 PM Emulator: Process finished with exit code 0
Tried restarting Android Studio
Tried recreating the AVD image
Tried killing and restarting adb
Running Ubuntu 18.04 with Android Studio 3.4
I expected that the emulator would start up and render the app created so far. I'm following https://www.youtube.com/watch?v=dFlPARW5IX8 and at about 21:22.
It says to press play and the emulator should start and show the app we have coded so far. I never see this.

Unable to launch weston on linux yocto from ssh

I have the error "no drm device found" as shown below.
I thinks the mail error is fatal: failed to create compoitor backend.
I have the following in my lib
desktop-shell.so drm-backend.so fbdev-backend.so fullscreen-shell.so gl-renderer.so hmi-controller.so ivi-shell.so wayland-backend.so x11-backend.so
root#salvator-x:/etc/systemd/system/multi-user.target.wants# /usr/bin/weston-launch \
-u root -- --idle-time=0 --config=/etc/xdg/weston/weston-drm-hdmi.ini $OPTARGS
Date: 2018-02-26 UTC
[21:29:08.949] weston 1.11.0
http://wayland.freedesktop.org
Bug reports to: https://bugs.freedesktop.org/enter_bug.cgi?product=Wayland&component=weston&version=1.11.0
Build: a9df8430-dirty v4l2-renderer: Fix calcluation of clip region (2017-04-13 18:25:00 +0900)
[21:29:08.949] OS: Linux, 4.9.0-yocto-standard, #1 SMP PREEMPT Mon Feb 26 17:46:03 EST 2018, aarch64
[21:29:08.949] Using config file '/etc/xdg/weston/weston-drm-hdmi.ini'
[21:29:08.950] Output repaint window is 34 ms maximum.
[21:29:08.950] Loading module '/usr/lib/weston/drm-backend.so'
[21:29:08.954] initializing drm backend
[21:29:08.954] logind: failed to get session seat
[21:29:08.954] logind: cannot setup systemd-logind helper (-61), using legacy fallback
[21:29:08.955] no drm device found
[21:29:08.955] fatal: failed to create compositor backend
failed to restore keyboard mode: Bad file descriptor
failed to set KD_TEXT mode on tty: Bad file descriptor
could not reset vt handling
How do I launch weston on linux yocto?
Here is the image:
So.. I found the answer to my question
it has three errors logind (systemd) was having trouble access the input keyboard type
second one is drm device is not found which implies that you have trouble accesing your output port. try to troubleshoot the port make it accessible to the board and then try to launch weston with correct config.
NOTE: Weston wayland wont launch if you dont have keyboard or a mouse connected preferably a usb

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