as andrés said, it is most probably because of a mismatch between recent 
(?) csound and old csoundqt.  you should definitely upgrade csoundqt. 
felipe has put a debian package here:
https://packages.debian.org/unstable/csoundqt

it is not difficult to build csoundqt from sources:
https://github.com/CsoundQt/CsoundQt/blob/master/BUILDING.md
https://github.com/CsoundQt/CsoundQt/wiki/Building-CsoundQt-for-Debian-with-QtCreator

i am using csoundqt nearly every day on debian, and it is definitely not 
broken.  there are issues with stablility in certain constellations 
(sometimes midi, sometimes hardware related, sometimes with strings from 
and to gui, in my experience) which we hopefully can solve together in 
finding out the reasons, step by step.

	joachim


On 30/11/16 01:22, Aaron Krister Johnson wrote:
> Hi all,
>
> I hope this doesn't come across as obnoxious, much respect to the
> hardoworking developers, but -- what do I have to do to get Csound-QT to
> work at all?
>
> I've tried it on various Linux platforms through the years, and different
> distros, and the result has always been the same: slow, buggy, prone to
> freezing, major audio dropouts, etc....even hard locking my computer
> forcing a hard reboot via a power button!
>
> I thought I'd give it another shot tonight, but sadly, similar behavior. I
> wonder how many folks try Csound this way, get frustrated, and move on...?
>
> I don't *want* to write it off as hopelessly broken, having seen the praise
> heaped on it in these parts, (and I know the authors work hard and with
> great dedication) but -- it sure seems hopelessly broken to me.
>
> Setup: PowerMac from 2013, Linux Mint
>
> uname -a gives:
>
> Linux akj-MacBookPro 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri Jan 22
> 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
>
> Csound QT version 0.8.2
>
> Any tips would be most appreciated, if viewed with skepticism. :) Until
> then, I remain a mostly CLI kind of csound user (with occasional forays
> into FLTK and Cabbage)
>
> Aaron Krister Johnson
> http://www.untwelve.org
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
>

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Dear Aron,

Thanks for the idea -  CsoundQt should tell somewhere (probably Help->About) 
which Csound version and maybe also which Qt version was used to build it. And 
warn if the version gets too far from the one found in the system.

But so far as Joachim suggested -  please find a way to update to CsoundQt 
0.9.3, you get always best performance if you build it yourself.
I can promise -  the experience will be different.

And  please join the CsoundQt mailing-list 
https://lists.sourceforge.net/lists/listinfo/qutecsound-users
for further questions or if you need help in building or anything

And report errors in the issues tracker with sufficient information -  this 
way you can be even more useful and help to get the program better :)

Best!
tarmo

On Tuesday 29 November 2016 18:22:25 you wrote:
> Hi all,
> 
> I hope this doesn't come across as obnoxious, much respect to the
> hardoworking developers, but -- what do I have to do to get Csound-QT to
> work at all?
> 
> I've tried it on various Linux platforms through the years, and different
> distros, and the result has always been the same: slow, buggy, prone to
> freezing, major audio dropouts, etc....even hard locking my computer
> forcing a hard reboot via a power button!
> 
> I thought I'd give it another shot tonight, but sadly, similar behavior. I
> wonder how many folks try Csound this way, get frustrated, and move on...?
> 
> I don't *want* to write it off as hopelessly broken, having seen the praise
> heaped on it in these parts, (and I know the authors work hard and with
> great dedication) but -- it sure seems hopelessly broken to me.
> 
> Setup: PowerMac from 2013, Linux Mint
> 
> uname -a gives:
> 
> Linux akj-MacBookPro 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri Jan 22
> 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
> 
> Csound QT version 0.8.2
> 
> Any tips would be most appreciated, if viewed with skepticism. :) Until
> then, I remain a mostly CLI kind of csound user (with occasional forays
> into FLTK and Cabbage)
> 
> Aaron Krister Johnson
> http://www.untwelve.org
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here