Linux-audio-user February 2008

linux-audio-user@lists.linuxaudio.org

143 participants
139 discussions

Re: [LAU] ALSA device not found by some users... why?

by Tim Black

Thanks, Clemens. Right, initially /dev/snd/*, /dev/dsp*, and /dev/audio* permissions were 600 root:root, and this is presumably set by udev. In this state, mpd2 could not access the devices, but if when I added mpd2 user to the root group it could, providing a somewhat insecure kludgey solution to my problem. So I keep looking for another solution... Then I added the following lines to my /etc/security/console.perms.d/50-default.perms: <sound>=/dev/dsp* /dev/snd/* /dev/audio* <… [View More]console> 0666 <sound> 0600 root.audio and now the permissions are 0666 root.audio by default. When I log in as user tim, it appears that the permissions get changed to 0666 tim.audio. This should still be fine, bc my mpd2 user is in the audio group, so *should* have read/write access. When I su mpd2, the permissions listed are the same, but mpd2 can't access the devices. I haven't tried actually logging in as mpd2 bc I didn't think it would be any different. I will try that later, but this may all be a moot point bc mpd2 is basically going to be a "server-only" user, with SHELL=/sbin/nologin, so for all this, I've modified the user to use bash just for testing purposes. Interestingly, as mpd2, I get permission denied error when try to access /dev/snd/pcmC0D0c, but as tim I get the expected error: [mpd2@servy tim]$ ls -la /dev/snd total 0 drwxr-xr-x 2 root root 460 2008-02-06 22:17 . drwxr-xr-x 15 root root 4520 2008-02-06 22:17 .. crw-rw-rw-+ 1 tim audio 116, 17 2008-02-06 22:17 controlC0 crw-rw-rw-+ 1 tim audio 116, 22 2008-02-06 22:17 controlC1 crw-rw-rw-+ 1 tim audio 116, 12 2008-02-06 22:17 controlC2 crw-rw-rw- 1 tim audio 116, 4 2008-02-06 22:17 controlC3 crw-rw-rw-+ 1 tim audio 116, 13 2008-02-06 22:17 midiC0D0 crw-rw-rw-+ 1 tim audio 116, 18 2008-02-06 22:17 midiC1D0 crw-rw-rw- 1 tim audio 116, 3 2008-02-06 22:17 midiC3D0 crw-rw-rw-+ 1 tim audio 116, 16 2008-02-06 22:17 pcmC0D0c crw-rw-rw-+ 1 tim audio 116, 15 2008-02-06 22:17 pcmC0D0p crw-rw-rw-+ 1 tim audio 116, 14 2008-02-06 22:17 pcmC0D1p crw-rw-rw-+ 1 tim audio 116, 21 2008-02-06 22:17 pcmC1D0c crw-rw-rw-+ 1 tim audio 116, 20 2008-02-06 22:17 pcmC1D0p crw-rw-rw-+ 1 tim audio 116, 19 2008-02-06 22:17 pcmC1D1p crw-rw-rw-+ 1 tim audio 116, 11 2008-02-06 22:17 pcmC2D0c crw-rw-rw-+ 1 tim audio 116, 10 2008-02-06 22:17 pcmC2D0p crw-rw-rw-+ 1 tim audio 116, 9 2008-02-06 22:17 pcmC2D1c crw-rw-rw-+ 1 tim audio 116, 8 2008-02-06 22:17 pcmC2D2c crw-rw-rw-+ 1 tim audio 116, 7 2008-02-06 22:17 pcmC2D3c crw-rw-rw-+ 1 tim audio 116, 6 2008-02-06 22:17 pcmC2D4p crw-rw-rw-+ 1 tim audio 116, 5 2008-02-06 22:17 seq crw-rw-rw-+ 1 tim audio 116, 2 2008-02-06 22:17 timer [mpd2@servy tim]$ cat /dev/snd/pcmC0D0c cat: /dev/snd/pcmC0D0c: Permission denied [mpd2@servy tim]$ exit exit [tim@servy ~]$ cat /dev/snd/pcmC0D0c cat: /dev/snd/pcmC0D0c: File descriptor in bad state An interesting observation is that when the sound devices were owned by root:root, when I add mpd2 user to root group, mpd2 can access the sound devices. But when I change the sound device to be owned by root:audio, adding the mpd2 user to audio group doesn't allow mpd2 to access the devices! This tells me that there's more to this than the device permissions. Any ideas? Tim -----Original Message----- From: linux-audio-user-bounces(a)lists.linuxaudio.org on behalf of Clemens Ladisch Sent: Thu 2/7/2008 12:18 AM Cc: linux-audio-user(a)lists.linuxaudio.org Subject: Re: [LAU] ALSA device not found by some users... why? Tim Black wrote: > User mpd2 needs access to ALSA devices bc I'm running MPD (music > player daemon) as this user. When this daemon tries to access ALSA > device hw:0,0, it gets an "Error opening ALSA device: hw:0,0 No such > device" error. (But if I run the daemon as 'tim' or root there are no > such errors.) When the device nodes in /dev/snd/ are created dynamically (with udev), it's possible that their permissions are set by the udev rules and do not come from the directory. When you log in as mpd2, what are the permissions of the files in /dev/snd/? Do you get the expected result when doing "cat /dev/snd/pcmC0D0c"? (The expected result is "file descriptor in bad state".) Regards, Clemens _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user [View Less]

17 years, 2 months

ALSA device not found by some users... why?

by Tim Black

Some users on my Fedora Core 8 system cannot seem to access any ALSA devices, while some can: [tim@servy ~]$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: AudioPCI [Ensoniq AudioPCI], device 0: ES1371/1 [ES1371 DAC2/ADC] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: AudioPCI [Ensoniq AudioPCI], device 1: ES1371/2 [ES1371 DAC1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: AudioPCI_1 [Ensoniq AudioPCI], device 0: ES1371/1 [ES1371 DAC2/ADC] Subdevices: 1/1 … [View More]Subdevice #0: subdevice #0 card 1: AudioPCI_1 [Ensoniq AudioPCI], device 1: ES1371/2 [ES1371 DAC1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: I6300ESB [Intel 6300ESB], device 0: Intel ICH [Intel 6300ESB] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: I6300ESB [Intel 6300ESB], device 4: Intel ICH - IEC958 [Intel 6300ESB - IEC958] Subdevices: 1/1 Subdevice #0: subdevice #0 while: [tim@servy ~]$ su mpd2 Password: [mpd2@servy tim]$ aplay -l **** List of PLAYBACK Hardware Devices **** <empty list> User mpd2 needs access to ALSA devices bc I'm running MPD (music player daemon) as this user. When this daemon tries to access ALSA device hw:0,0, it gets an "Error opening ALSA device: hw:0,0 No such device" error. (But if I run the daemon as 'tim' or root there are no such errors.) I created a new "audio" group, made all sound devices (/dev/snd/, /dev/dsp*, /dev/audio*) accessible to the "audio" group members, and added the mpd2 user to this group, but I still get the same errors. In fact, the only way I've been able to get past the permission problem is to put the new users into the root group, which is not an acceptable solution to me. So this seems very much like a case of bad ALSA device permissions, but I don't know what else I can do to fix it. Do you? What am I missing? The /proc/asound filesystem seems to be fully populated and accessible by both tim and mpd2. My ALSA Driver Version is 1.0.15 (Tue Nov 20 19:16:42 2007 UTC). Since I'm using FC8, I was beginning to think that PulseAudio was behind this. I've followed the threads on FC8 audio problems, but none of the suggested solutions have worked for me. (I have ConsoleKit and avahi daemons running and have removed alsa-plugins-pulseaudio and am still getting the same errors.) I would appreciate any suggestions or clues anyone might have. Thanks, Tim BIAMP SYSTEMS EMAIL NOTICE The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. If you are not the intended recipient, you are not authorized to use or disclose this information, and we request that you notify us by reply mail or telephone and delete the original message from your mail system. [View Less]

17 years, 2 months

Re: [LAU] OT What newer CDR/RW drives should I consider? opps I

by David Forsyth

linux-audio-user-request(a)lists.linuxaudio.org wrote: > 2. Re: OT What newer CDR/RW drives should I consider? opps I > forgot a few things... (Matthias Sch?nborn) > 3. Re: Fwd: Re: OT What newer CDR/RW drives should I consider? > opps I forgot a few things... (Allan Wind) > Message: 3 > Date: Tue, 5 Feb 2008 17:43:23 -0500 > From: Allan Wind > > On 2008-02-05T17:16:25-0500, ka1iic(a)prexar.com wrote: >> I'm replacing an old Matshita CW-7585 … [View More]

17 years, 2 months

ssh problem, with ubuntu realtime kernel

by Atte André Jensen

Hi I recently switched to ubuntu (from debian) and for the most parts I'm doing ok. However when running the realtime kernel (that's part of ubuntu, I think I simply imstalled it by "apt-get install linux-image-rt linux-restricted-modules-rt") the computer completely freezes (not even accepting incomming ssh) when copying larger files with scp. Very small files are ok, just now it died on my with a 8M file. I'm running the ath_pci module from restricted modules for my wlan card, and the … [View More]

17 years, 2 months

Re: [LAU] Independence Free crashes fst

by Emanuel Rumpf

2008/2/6, Ismael Valladolid Torres <ivalladt(a)gmail.com>: > On Feb 6, 2008 10:51 AM, Emanuel Rumpf <xbran(a)web.de> wrote: > > 2008/2/5, Ismael Valladolid Torres <ivalladt(a)gmail.com>: > > > The error was 'RenderBadPicture (invalid Picture parameter)'. > > > > a known wine bug (http://bugs.winehq.org/show_bug.cgi?id=6673) > > try: > > WINEDEBUG=synchronous fst plugin.dll > > Maybe like this? > > $ export WINEDEBUG="+… [View More]

17 years, 2 months

Independence Free crashes fst

by Ismael Valladolid Torres

One colleague is specially interested in making [1]Independence Free running via fst... 1. http://www.yellowtools.com/ Unfortunatelly... JACK tmpdir identified as [/dev/shm] err:ole:CoInitializeEx Attempt to change threading model of this apartment from multi-threaded to apartment threaded gui_thread_id = 16 The program 'fst.exe.so' received an X Window System error. This probably reflects a bug in the program. The error was 'RenderBadPicture (invalid Picture parameter)'. (Details: serial … [View More]

17 years, 2 months

xrun killing: ubuntu realtime kernel, layla 3g card combining ADAT and analog i/o

by Sean Corbett

Hello all, I've been racking my brains over this for some time now. I have an older (2003 or so, but still pretty decent) dual processor AMD machine with an Echo Layla 3G audio interface, and connected to the Layla via ADAT, an Alesis AI3 A/D converter. So after some hunting, I discovered that the Echo driver is written so that the analog and digital parts of the I/O appear on hw:0,0 and hw:0,1, respectively. So I learned how to make an .asoundrc file using the "multi" plugin to combine all … [View More]32 channels (16 analog, total ins and outs, and 16 ADAT) into a single interface. So far, so good... Jack sees all 16 ins and 16 outs, and i can get audio to pass at various sample rates through all the channels (so I'm assuming it's not a sync problem). However, running UbuntuStudio's realtime kernel, I get about 3-4 xruns per second. I have so far tried: -editing /etc/security/limits.conf with appropriate values for the audio group -tweaking the realtime priority of jack, various timer threads, and the IRQ thread for Layla, using chrt (jack is set to RT via qjackctl) -setting the frames/period as high as 2048 seems to have little, if any, effect, though setting it way down (32-64 frames) gives hundreds of xruns per second. The problem does not seem to be present when i use either hw:0,0 or hw:0,1 directly as the device (with no other settings changed)... in fact, i can run Jack reliably at 32 frames when i do so, leading me to think it's either a) something with the multi plugin or asoundrc? or, b) perhaps a slight ADAT clock jitter? (the AI3 syncs to whatever clock it finds on its inputs, plus Layla's clock is set to internal, so this seems unlikely.) Anyone have any suggestions as to what to try next? Thanks in advance for any help whatsoever... ---- here are some more details: running alsa version 1.0.14, jack version 0.103.0 contents of my .asoundrc: # create a virtual sixteen-channel device with layla's # analog and digital i/o: pcm.layla16 { type multi; slaves.a.pcm "hw:0,0"; slaves.a.channels 8; slaves.b.pcm "hw:0,1"; slaves.b.channels 8; bindings.0.slave a; bindings.0.channel 0; bindings.1.slave a; bindings.1.channel 1; bindings.2.slave a; bindings.2.channel 2; bindings.3.slave a; bindings.3.channel 3; bindings.4.slave a; bindings.4.channel 4; bindings.5.slave a; bindings.5.channel 5; bindings.6.slave a; bindings.6.channel 6; bindings.7.slave a; bindings.7.channel 7; bindings.8.slave b; bindings.8.channel 0; bindings.9.slave b; bindings.9.channel 1; bindings.10.slave b; bindings.10.channel 2; bindings.11.slave b; bindings.11.channel 3; bindings.12.slave b; bindings.12.channel 4; bindings.13.slave b; bindings.13.channel 5; bindings.14.slave b; bindings.14.channel 6; bindings.15.slave b; bindings.15.channel 7; } # Create a fake mixer for Jack to talk to ctl.layla16 { type hw; card 0; } Some JACK output: 20:49:28.832 JACK is starting... 20:49:28.832 jackd -R -P60 -t2000 -dalsa -dlayla16 -r48000 -p1024 -n2 20:49:28.836 JACK was started with PID=6352 (0x18d0). jackd 0.103.0 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. apparent rate = 48000 creating alsa driver ... layla16|layla16|1024|2|48000|16|16|nomon|swmeter|-|32bit configuring for 48000Hz, period = 1024 frames, buffer = 2 periods ALSA: final selected sample format for capture: 32bit little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit little-endian ALSA: use 2 periods for playback 20:49:30.863 Server configuration saved to "/home/sean/.jackdrc". 20:49:30.864 Statistics reset. 20:49:30.866 Client activated. 20:49:30.869 Audio connection change. 20:49:30.882 Audio connection graph change. JACK tmpdir identified as [/dev/shm] 20:49:30.984 XRUN callback (1). 20:49:32.285 XRUN callback (2). 20:49:32.883 XRUN callback (4 skipped). 20:49:35.740 XRUN callback (6). 20:49:37.259 Client deactivated. 20:49:37.261 JACK is stopping... jack main caught signal 15 no message buffer overruns 20:49:37.283 JACK was stopped successfully. [View Less]

17 years, 2 months

Benoit's stuff

by Ken Restivo

Now that LAM is back up, I've been catching up on what's posted. I've really enjoyed the music that Benoit Rouits has posted. Very interesting, meditative, ambient kind of stuff. Some of the sounds and patches are just gorgeous too (i.e. on "Organum"). Nice stuff, very impressive. -ken

17 years, 2 months

Fwd: Re: OT What newer CDR/RW drives should I consider? opps I forgot a few things...

by ka1iic＠prexar.com

OK folks... I know I did it again I forgot some of the more important things in my specs... I'm replacing an old Matshita CW-7585 ATAPI IDE internal drive and wish a newer drive to be a 'plugin' replacement... It's a junk parts system with an old INTEL 1.7GHZ mother board and I use it for single copies of original music... and little more... I am using X-CD-Roast and wish to stay with that program.... Excuse the lack of info... vince On Monday 04 February 2008 22:05, Vince Werber wrote:… [View More]

17 years, 2 months

HDSPmixer and AES32

by Reuben Martin

So if I understand correctly, my AES32 has the same matrix functionality as the HDSP cards, but the hdspmixer (and similar hdsptools) do not recognize the AES32. (Apparently hdspmixer hasn't been kept up to date for quite a while) Does hdspmixer just need the card definitions of the AES32 added or is the differences between it and the HDSP series more complex than that? Are there any patches floating around for this? -Reuben

17 years, 2 months

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Linux-audio-user February 2008