write once, run anywhere: bah

From	Eli the Bearded <*@eli.users.panix.com>
Newsgroups	comp.os.linux.misc
Subject	write once, run anywhere: bah
Date	2026-07-06 01:38 +0000
Organization	Some absurd concept
Message-ID	<eli$2607052126@qaz.wtf> (permalink)

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I have a piece of software, to drive a USB camera, that ran fine on
Ubuntu 20.04 but is segfaulting on Debian 13. It's something to do with
the "libuvc" library. Before I installed libuvc0
(libuvc0_0.0.7-3_amd64.deb), it ran but with an all white window and an
error message about libuvc to stdout. Now it crashes almost immediagely:

Stack: [0x00007fdf89d00000,0x00007fdf89e00000],  sp=0x00007fdf89dfe4a8, free space=1017k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libuvc.so.0+0xaa48]  uvc_get_format_descs+0x8
C  [libHelloJni.so+0xb1b8]  Java_HelloJni_getResolutions+0x195
j  HelloJni.getResolutions(LCamera;)[LResolution;+0
j  Visualizer.init()V+7887
j  Visualizer.main([Ljava/lang/String;)V+348
v  ~StubRoutines::call_stub 0x00007fdf73d37cc6
V  [libjvm.so+0x9377ca]  JavaCalls::call_helper(JavaValue*, methodHandle const&, JavaCallArguments*, JavaThread*)+0x2da V  [libjvm.so+0x9e3175]  jni_invoke_static(JNIEnv_*, JavaValue*, _jobject*, JNICallType, _jmethodID*, JNI_ArgumentPusher *, JavaThread*) [clone .constprop.1]+0x365
V  [libjvm.so+0x9f5502]  jni_CallStaticVoidMethod+0x252
C  [libjli.so+0x522b]  JavaMain+0xf4b
C  [libjli.so+0x826d]  ThreadJavaMain+0xd
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  HelloJni.getResolutions(LCamera;)[LResolution;+0
j  Visualizer.init()V+7887
j  Visualizer.main([Ljava/lang/String;)V+348
v  ~StubRoutines::call_stub 0x00007fdf73d37cc6
 
siginfo: si_signo: 11 (SIGSEGV), si_code: 128 (SI_KERNEL), si_addr: 0x0000000000000000

So happy to have what I thought would be an upgrade proof piece of
software fail so quickly.

When I purchased this, I thought the "works with Linux" meant it worked
like a regular webcam, not "requires special software". I would not have
bought it knowing it needed special software.

The company to avoid is Ipevo, and the camera to avoid is the V4K.

Elijah
------
a pox on proprietary interfaces

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write once, run anywhere: bah Eli the Bearded <*@eli.users.panix.com> - 2026-07-06 01:38 +0000
  Re: write once, run anywhere: bah c186282 <c186282@nnada.net> - 2026-07-06 06:47 -0400
  Re: write once, run anywhere: bah Nelyon283 <nelyon2034829430274@noemail.invalid.invalid> - 2026-07-06 16:46 +0000

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