adb start-server not completing so scrcpy cannot start

[pmrtvcom]

Environment

• OS: Debian
• Scrcpy version: 3.1
• Installation method: install script
• Device model: Fairphone 5
• Android version: 14

Describe the bug

scrcpy fails to start, Ctrl-C producing a message that adb start-server exited unexpectedly.

Trying ADB_TRACE=1 adb start-server does this:

adb D 12-13 02:40:37 3631395 3631395 adb_trace.cpp:192] Android Debug Bridge version 1.0.41
adb D 12-13 02:40:37 3631395 3631395 adb_trace.cpp:192] Version 29.0.6-debian
adb D 12-13 02:40:37 3631395 3631395 adb_trace.cpp:192] Installed as /usr/lib/android-sdk/platform-tools/adb
adb D 12-13 02:40:37 3631395 3631395 adb_trace.cpp:192]
adb D 12-13 02:40:37 3631395 3631395 adb_client.cpp:329] adb_connect: service: host:start-server
adb D 12-13 02:40:37 3631395 3631395 adb_client.cpp:154] _adb_connect: host:version
adb D 12-13 02:40:37 3631395 3631395 adb_io.cpp:107] writex: fd=6 len=16 30303063686f73743a76657273696f6e 000chost:version
adb D 12-13 02:40:37 3631395 3631395 adb_io.cpp:81] readx: fd=6 wanted=4

Nothing else happens. Ctrl-C exits without further message.

[rom1v]

Try using adb only (without scrcpy).

adb devices
adb shell
…