Meizu M6s display issue

[Hippobotus]

• [YES] I have read the FAQ.
• [YES] I have searched in existing issues.

Environment

• OS: Windows 10
• scrcpy version: v1.14 onwards
• installation method: Windows 64-bit zipped file
• device model: Meizu M6s
• Android version: Nougat 7.0

Describe the bug
Scrcpy cannot display the output when connected to Meizu M6s from v1.14 onwards.
For the record, version 1.13 works well

I tried the adb shell screenrecord command as suggested in other threads and it works on this phone.
Also tried these command-line options but to no avail.

scrcpy --render-driver=opengl
scrcpy -b2M -m1024

On errors, please provide the output of the console (and adb logcat if relevant).

These are the console outputs when running different version(s).

[server] INFO: Device: Meizu Meizu M6s (Android 7.0)
INFO: Created renderer: direct3d
INFO: Renderer: direct3d
INFO: Initial texture: 720x1440
ERROR: SDL failed to get a vertex buffer for this Direct3D 9 rendering batch!
ERROR: Dropping back to a slower method.
ERROR: This might be a brief hiccup, but if performance is bad, this is probably why.
ERROR: This error will not be logged again for this renderer.

v1.15\scrcpy-server:... file pushed, 0 skipped. 44.0 MB/s (33618 bytes in 0.001s)
[server] INFO: Device: Meizu Meizu M6s (Android 7.0)
INFO: Renderer: direct3d
INFO: Initial texture: 720x1440

v1.16\scrcpy-server:... file pushed, 0 skipped. 43.0 MB/s (33622 bytes in 0.001s)
[server] INFO: Device: Meizu Meizu M6s (Android 7.0)
INFO: Renderer: direct3d
INFO: Initial texture: 720x1440

logcat0001.txt
logcat0002.txt

Please find attached the logcat files. Hope these information help in figuring out a solution.

Thank you.

[rom1v]

Could you follow these steps to help resolving this specific issue, please? #240 (comment)

[Hippobotus]

I tried the linked binaries and again the console window appears but not the UI window.

[server] INFO: Device: Meizu Meizu M6s (Android 7.0)
[server] INFO: ### 1
[server] INFO: ### 2
INFO: Renderer: direct3d
INFO: Initial texture: 720x1440

logcat0003.txt

Here is the logcat for your reference.

Thank you.

[rom1v]

Thank you for the test.

The commit introducing the "regression" is 62c0c13.
The problem is that I can't revert it, since it fixes other issues.

This should work for your device:

diff

diff --git a/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java b/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
index c7c104e4..b723cf32 100644
--- a/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
+++ b/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
@@ -55,17 +55,8 @@ public class ScreenEncoder implements Device.RotationListener {
 
     public void streamScreen(Device device, FileDescriptor fd) throws IOException {
         Workarounds.prepareMainLooper();
-
-        try {
-            internalStreamScreen(device, fd);
-        } catch (NullPointerException e) {
-            // Retry with workarounds enabled:
-            // <https://github.com/Genymobile/scrcpy/issues/365>
-            // <https://github.com/Genymobile/scrcpy/issues/940>
-            Ln.d("Applying workarounds to avoid NullPointerException");
-            Workarounds.fillAppInfo();
-            internalStreamScreen(device, fd);
-        }
+        Workarounds.fillAppInfo();
+        internalStreamScreen(device, fd);
     }
 
     private void internalStreamScreen(Device device, FileDescriptor fd) throws IOException {

If you are comfortable with editing and building, could you try removing the Workarounds.prepareMainLooper() call, or call only parts of Workarounds.fillAppInfo()?

Here is the logcat for your reference.

Thank you, but like others with that device, the logcat is broken (it only prints the ~500 first lines).

[Hippobotus]

If you are comfortable with editing and building, could you try removing the Workarounds.prepareMainLooper() call, or call only parts of Workarounds.fillAppInfo()?

Unfortunately I am not familiar with programming. In this case, I can make a separate folder for scrcpy v1.13 and use it to connect to this Meizu phone only.

Thank you, but like others with that device, the logcat is broken (it only prints the ~500 first lines).

Is there any way to fix the logcat?

Thank you.

[HEZI0427]

@rom1v
this issue not like problem on oppo device(cause NPE error): #921
Meizu device you need set Looper.prepare() and check by Looper.myLooper(), this is code work for me ( Too urgly!!!)。

-        if (Looper.getMainLooper() != null) {
-            return;
+        if (Build.BRAND.toLowerCase().contains("meizu")) {
+            if (Looper.myLooper() != null) {
+                return;
+            }
+            Looper.prepare();
+        } else {
+            if (Looper.getMainLooper() != null) {
+                return;
+            }
+            Looper.prepareMainLooper();
         }
-        Looper.prepareMainLooper();
     }

[rom1v]

@HEZI0427 Thank you for the details.

But scrcpy just calls Looper.prepareMainLooper(); unconditionally, where does this diff apply?

On meizu, is scrcpy stuck in Looper.prepareMainLooper(); or somewhere else?

[rom1v]

@HEZI0427 ?

[HEZI0427]

@HEZI0427 ?
so sorry reply too slow.
i can get error in scrcpy version 1.19 on meizu 17 Pro, it seem like system error.
thank you for help !!!

[rom1v]

This should be fixed by 8df42ce (on dev branch current, will be in v1.20).