SRU template added to the description. The fix from Debian 0.9.73-6
(Debian bug #1151414) could be backported to resolute as
0.9.73-5ubuntu0.1.
** Description changed:
+ [ Impact ]
+
+ jack-capture 0.9.73-5 in Ubuntu 26.04 (resolute) was built with all
+ optional features silently disabled. The feature tests in
+ gen_setformat_c.sh and gen_das_config_h.sh (0.9.73 release tarball)
+ use "main(){...}" without a return type, which is an error since
+ GCC 14 (-Wimplicit-int). Every test fails silently, so:
+
+ - "jack_capture --print-formats" prints nothing
+ - "-f ogg" / "-f flac" silently produce uncompressed 32-bit float WAV
+ files with the requested extension (much larger files, wrong format)
+ - "-mp3" and OSC support are unavailable
+
+ This is a regression from Ubuntu 24.04 (0.9.73-4ubuntu1), where all
+ of this works. Users recording with jack_capture get files in the
+ wrong format without any error.
+
+ Fixed in Debian 0.9.73-6 ("Fix checks for libraries and file
+ formats", Debian bug #1151414). Upstream master is also fixed
+ ("int main(void){...}") but no release contains it yet.
+
+ [ Test Plan ]
+
+ 1. Install the proposed jack-capture package.
+ 2. Check dependencies: "apt-cache depends jack-capture" must list
+ liblo7 and libmp3lame0 again.
+ 3. "jack_capture --print-formats" must list formats (wav, aiff,
+ flac, ogg, ...). With the broken package it prints nothing.
+ 4. Record a short file (PipeWire or JACK running):
+ pw-jack jack_capture -d 5 -f ogg test.ogg
+ sndfile-info test.ogg | grep Format
+ The format must be 0x00200060 (OGG/Vorbis), not
+ WAVE_FORMAT_IEEE_FLOAT.
+ 5. "pw-jack jack_capture -d 5 -mp3" must produce an MP3 file instead
+ of "mp3 not supported. liblame was not installed when compiling".
+
+ [ Where problems could occur ]
+
+ The change only affects build-time feature detection. It restores the
+ features that were enabled in 0.9.73-4ubuntu1 (noble), so the
+ resulting binary should behave like the one in the previous LTS. The
+ package gains back runtime dependencies on liblo7 and libmp3lame0.
+ Possible issues would be in the re-enabled code paths (OGG/FLAC
+ writing through libsndfile, MP3 through LAME, OSC through liblo),
+ which are the same code paths shipped and used in noble.
+
+ [ Other Info ]
+
+ Debian bug: https://bugs.debian.org/1151414 (fixed in 0.9.73-6)
+ Upstream discussion: https://github.com/kmatheussen/jack_capture/issues/58
+ Workaround currently used: installing 0.9.73-4ubuntu1 from noble on
+ resolute, which works correctly.
+
+
-------------------------------------------------------------------------------
+
Hello,
I believe there may be a packaging issue with jack_capture in Xubuntu
26.04.
System:
Xubuntu 26.04
jack_capture 0.9.73-5
libsndfile 1.2.2-4
I initially noticed that recordings created with jack_capture were much
larger than expected, which led me to investigate the output format
handling.
Some observations:
The command
jack_capture --print-formats
produces no output at all.
When running
pw-jack jack_capture -f ogg
I get:
Warning. Could not set higher priority for a SCHED_OTHER process using
setpriority().
Warning, the format "wav" is not supported. Using ogg instead.
Recording to "jack_capture_01.ogg". Press <Return> or <Ctrl-C> to stop.
This message appears inconsistent because I explicitly requested OGG
output, yet the warning refers to WAV not being supported.
The upstream developer of jack_capture suggested that an empty output from
jack_capture --print-formats
could indicate that something went wrong during compilation or
packaging, possibly involving format detection or libsndfile
integration.
I am reporting this because the behavior appears abnormal and may
indicate a packaging or build issue in the Ubuntu/Xubuntu package.
Please let me know if additional diagnostic information would be useful.
Thank you.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: jack-capture 0.9.73-5
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Sat Jun 13 19:11:09 2026
InstallationDate: Installed on 2021-01-17 (1973 days ago)
InstallationMedia: Xubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
ProcEnviron:
- LANG=fr_FR.UTF-8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-256color
- XDG_RUNTIME_DIR=<set>
+ LANG=fr_FR.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: jack-capture
UpgradeStatus: Upgraded to resolute on 2026-05-28 (16 days ago)
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https://bugs.launchpad.net/bugs/2156660
Title:
Possible packaging issue with jack_capture on Xubuntu 26.04
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