Bug 203703
| Summary: | audio/alsa-lib: libasound.so.2 shouldn't attempt to open Linux sequencer device /dev/snd/seq | ||||||
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| Product: | Ports & Packages | Reporter: | Yuri Victorovich <yuri> | ||||
| Component: | Individual Port(s) | Assignee: | Yuri Victorovich <yuri> | ||||
| Status: | Closed Feedback Timeout | ||||||
| Severity: | Affects Only Me | CC: | christos, hselasky, w.schwarzenfeld | ||||
| Priority: | --- | Keywords: | needs-patch, needs-qa | ||||
| Version: | Latest | ||||||
| Hardware: | Any | ||||||
| OS: | Any | ||||||
| Attachments: |
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Can you provide an example command line or a piece of code? seq interface isn't implemented by any plugin among alsa-plugins. And snd_seq_open() already returns an error (-2) if a device cannot be opened, see test/playmidi1.c. oss plugin can probably leverage libsalsa code but needs to support software synthesizer when there's no hardware (no virmidi to redirect). Patches welcome... http://sourceforge.net/p/opensound/git/ci/master/tree/lib/libsalsa/seq.c http://sourceforge.net/p/opensound/git/ci/master/tree/tutorials/sndkit/softsynth/softsynth.c I got this error message during an attempt to port one Linux audio package. It bounded to libasound.so.2 and the message got produced. (The package itself might be ALSA-only, and is probably not able to work on FreeBSD, although it is a very nice tool.)
If you would really like to reproduce it, I am attaching the shar for the port that I was trying to make: qtractor. It builds, and runs when Jack audio server is running (/usr/local/bin/jackd -R -doss -r44100 -p1024 -n3 -w16 -C/dev/dsp0 -P/dev/dsp0).
It prints the above message.
Also here is the DTrace log of the failure operation:
0 61925 openat:return openat failure: fd=-100 file=/dev/snd/seq flags=1048582 errno=2
libc.so.7`__sys_openat+0xa
libc.so.7`open+0xb8
libasound.so.2.0.0`snd_seq_hw_open+0x7b
libasound.so.2.0.0`_snd_seq_hw_open+0xc4
libasound.so.2.0.0`0x800e2124b
qtractor`0x4cb04c
qtractor`0x51e97d
qtractor`0x5a5cf4
qtractor`0x59b01f
qtractor`0x5975f5
qtractor`0x595255
qtractor`QWindowsStyle::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const+0x3483
qtractor`QWindowsStyle::drawControl(QStyle::ControlElement, QStyleOption const*, QPainter*, QWidget const*) const+0x1e3
ld-elf.so.1`_rtld+0x240
Created attachment 162213 [details]
Unfinished qudio/qtractor port as a testcase
Is this still relevant? I will retest it and will see if this is still relevant. There is now audio/alsa-seq-server in base. And it should work with ALSA's /dev/snd/seq . --HPS |
Currently (version 1.0.29) it attempts to open it, and produces this somewhat misleading message: > ALSA lib seq_hw.c:457:(snd_seq_hw_open) open /dev/snd/seq failed: No such file or directory Instead, it should return an error right away, and the message should say that ALSA sequencer isn't available on FreeBSD.