bb.linuxsampler.org

Posted: **Sun Mar 14, 2010 5:42 am**

hello

I can start Qsampler only one time every 4 to 6 attemps; the other times, it says

Segmentation defaults

all the info i could get until now is after typing dmesg

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[  533.049170] qsampler[3966]: segfault at 16f6448 ip 00007fdc60cbafc8 sp 00007fff46f56dc0 error 4 in libQtGui.so.4.6.2[7fdc605e6000+a4e000]
[  550.878995] qsampler[3979]: segfault at 7f3c02ae60e8 ip 00007f3ccabe9fc8 sp 00007fff7ec4fb80 error 4 in libQtGui.so.4.6.2[7f3cca515000+a4e000]
[  665.107963] qsampler[4004]: segfault at 7fb1016f6448 ip 00007fb145519fc8 sp 00007fff57999600 error 4 in libQtGui.so.4.6.2[7fb144e45000+a4e000]
[  674.752181] qsampler[4010]: segfault at 7fc0f97e02a8 ip 00007fc0fb3fcfc8 sp 00007fff9f4cc730 error 4 in libQtGui.so.4.6.2[7fc0fad28000+a4e000]

this is after several crash following each other; each time Jack is runing with the values of Frames/Periods and Periods/Buffer quite high (512 and 4)

i configured my /etc/security/limits.conf like this

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@audio		 - 	 rtprio		 99
@audio		 - 	 nice		        -10
@audio		 -	 memlock	        500000

(i have 4 Go RAM)

could someone help, please, if possible
thank you!

victor

Posted: **Sun Mar 14, 2010 6:26 pm**

i've found a solution:

as the error was pointing to the libQtGui, i tried to dowgrade qt-gui (x11-libs/qt-gui as I'm on Gentoo) from 6.2.4 to 5.4.3

now it's working

so i suppose it's really a bug; most of the things i've read about it was a bug; furthermore, qsampler was working every 4 to 8 times i was launching it, without nothing else that had changed; and finally, the 'at', 'ip' and 'sp' numbers, in the dmesg error message are always different, which suggest (if i have understood - i'm a newbie, don't forget it) that the error happens each time at a "different place"

si i guess i have to report it? where to start? i've never done that... qsampler page? qt ?

edit : report done; it has been corrected in one hour; new version without the bug from the svn repository on the web site of Qsampler

thank you

victor

bb.linuxsampler.org

Qsampler crash : error 4

Qsampler crash : error 4

Re: Qsampler crash : error 4