Thanks JackOfAll,Originally Posted by JackOfAll
I've tried your solution for realtime scheduling using PAM with no luck I'm afraid. I also tried the solution drafted in this post: http://www.jackaudio.org/linux_rt_config
From what I can understand this has something to do with the use of a kernel that has the option RT_GROUP_SCHED enabled, and now I'm in way over my head.
I'll try do do some read-up on this (found the broken wiki link), but I think it's strange if this is an unusal "error" as I'm using a very default distribution.
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2013-03-14, 12:39 #1131Junior Member
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2013-03-14, 13:51 #1132Senior Member
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If you don't get the "errors" running as root, you have a preemptible kernel. So it is a config issue. Whatever user is used to run squeeselite when started as local player does not have rt privs. Originally Posted by tobia5
Add your user/login to the audio group. Add /etc/security/limits.d/99-audio.conf
Log out. Log back in. (If you are running an X session, log out and start a new one. If ssh, log out and back in again, otherwise it wont pick up the settings.) Run "ulimit -a". Does it say "real-time priority = 50"? Does it say, "max locked memory = unlimited"?Code:@audio - rtprio 50 @audio - memlock unlimited
Stop LocalPlayer Plugin. Run "/var/lib/squeezeboxserver/cache/InstalledPlugins/Plugins/LocalPlayer/Bin/squeezelite-i386 -o hw:CARD=C10,DEV=0 -d all=debug" from the comand line. Do you see the errors?
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2013-03-14, 14:20 #1133Senior Member
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Don't see a segfault in the logs? As you compilied it yourself can you run with gdb to find where it crashes? Originally Posted by sle118
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2013-03-14, 14:48 #1134Junior Member
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Thank you again, Originally Posted by JackOfAll
Did just what you proposed and I got no errors. Then I tried to add 'squeezeboxserver' to the audio group, but then I still have the "error". Any other group memberships for 'squeezeboxserver' I should look at? Does 'nogroup' have anything to do with this?
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2013-03-14, 15:17 #1135Member
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I recompiled with debugging symbols. Here is what I get when running using gdb Originally Posted by Triode
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[New Thread 0x40033470 (LWP 2428)]
[New Thread 0x4535b470 (LWP 2429)]
[Thread 0x4535b470 (LWP 2429) exited]
[New Thread 0x40b6e470 (LWP 2430)]
[New Thread 0x4535b470 (LWP 2431)]
[New Thread 0x40d23470 (LWP 2432)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x40d23470 (LWP 2432)]
0x40bd1760 in mad_layer_III () from /usr/lib/arm-linux-gnueabihf/libmad.so.0
(gdb) backtrace
#0 0x40bd1760 in mad_layer_III () from /usr/lib/arm-linux-gnueabihf/libmad.so.0
#1 0x00000000 in ?? ()
seems like a crash in libmad... I'll try to do additional research unless you have a quick solution?
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2013-03-14, 15:29 #1136Senior Member
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no - sorry - not seen it crash there before Originally Posted by sle118
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2013-03-14, 18:02 #1137Member
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I am researching the issue. It seems like this is a known bug in libmad (arm specific optimizations). Originally Posted by Triode
https://bugs.launchpad.net/ubuntu/+s...ad/+bug/989846
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2013-03-15, 03:04 #1138Senior Member
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OK will leave you with this as it looks specific to that library and archiecture rather than anything in squeezelite. Originally Posted by sle118
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2013-03-15, 06:37 #1139Member
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Triode, I resolved the issue and will leave a trace here in case someone else encounters a segment fault error on these little devices that are becoming more and more popular (imagine a fully functional, FLAC capable, sub $45 assembly that can also act as a portable server). Originally Posted by Triode
The issue is resolved in the newest version of libmad, so I went ahead and re-compiled to the latest source with the help of a procedure that was written by user purch in the forum link below.
http://www.solid-run.com/phpbb/viewtopic.php?f=4&t=1124
They have submitted the fix and it is in the next Ubuntu version only. Let's build it for our Ubuntu Quantal.
Code:
mkdir -p ~/build/libmad
cd ~/build/libmad
sudo apt-get install fakeroot dpkg-dev build-essential
sudo apt-get source libmad0
sudo apt-get build-dep libmad0
sudo chown your_user.your_user libmad* -R
dpkg-source -x libmad_0.15.1b-7ubuntu1.dsc
cd libmad-0.15.1b/
dpkg-buildpackage -rfakeroot -b
sudo dpkg -i ../libmad0_0.15.1b-7ubuntu1_armhf.deb
sudo apt-get hold libmad0
sudo service mpd restart
mpc update
I had to make some additional tweaks for my environment, but now I have SqueezeLite working!
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2013-03-15, 10:24 #1140Member
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Just done a total reinstall of Win7 64bit, LMS and SqueezeLite-win.
I'm STILL getting crazy clipping with all volumes at 100%. Bringing SqueezeLite to 99% volume via iPeng the clipping completely disappears.
I get no clipping with any of the other Squeeze players under Windows under the same circumstances.
Surely a problem inherit in SqueezeLite? Can someone try playing some heavily compressed (ie. modern) music under SqueezeLite-win with all volumes at 100%? Can't be just me.
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