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<p>I just downloaded Squeak on my up to date Linux Mint computer (a
Core I 3 from 2009) and right at the start (before the message you
report) I get the message copied below. <br>
</p>
<p>No sound with vm-sound-alsa but sound with vm-sound-pulse and
always the same message. But it sounds like high latency and not
as bad as on the Pi (with the keyboard). When waggling the
keyboard Squeak goes from 5% to 56% CPU. That seems a lot to me.<br>
</p>
<p>Cheers,</p>
<p><br>
</p>
<p>Herbert</p>
<p><br>
</p>
<p>"Using
/home/herbert/Schreibtisch/Squeak5.3alpha-19256-64bit-201911012148-Linux/bin/squeak...<br>
pthread_setschedparam failed: Operation not permitted<br>
This VM uses a separate heartbeat thread to update its internal
clock<br>
and handle events. For best operation, this thread should run at
a<br>
higher priority, however the VM was unable to change the
priority. The<br>
effect is that heavily loaded systems may experience some latency<br>
issues. If this occurs, please create the appropriate
configuration<br>
file in /etc/security/limits.d/ as shown below:<br>
<br>
cat <<END | sudo tee /etc/security/limits.d/squeak.conf<br>
* hard rtprio 2<br>
* soft rtprio 2<br>
END<br>
<br>
and report to the squeak mailing list whether this improves
behaviour.<br>
<br>
You will need to log out and log back in for the limits to take
effect.<br>
For more information please see<br>
<a class="moz-txt-link-freetext" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/tag/r3732#linux">https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/tag/r3732#linux</a><br>
"<br>
</p>
<div class="moz-cite-prefix">Am 25.12.20 um 13:55 schrieb Bruce
O'Neel:<br>
</div>
<blockquote type="cite"
cite="mid:1608900955-a8e254641e67b9ccf42cac1ed5048d0b@pckswarms.ch">
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<div><br>
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<div>So another data point.<br>
</div>
<div><br>
</div>
<div>Linux Mint 20 (so basically Ubuntu) on x86-64. Happens to be
a MacBook Air but I don't think that's important.<br>
</div>
<div><br>
</div>
<div>My normal install only build vm-sound-OSS. And with that
there is no sound and a complaint in the terminal about /dev/dsp
not existing. Which is true, /dev/dsp does not exist.<br>
</div>
<div><br>
</div>
<div>But if install libpluse-dev before I build the VM then I also
get vm-sound-pluse.<br>
</div>
<div><br>
</div>
<p style="margin: 0px; font-style: normal; font-variant-caps:
normal; font-weight: normal; font-stretch: normal; line-height:
normal;"><span class="colour" style="color:rgb(0, 0, 0)"><span
class="font" style="font-family:Menlo"><span class="size"
style="font-size:11px"><span
style="font-variant-ligatures: no-common-ligatures">tmp/opensmalltalk-vm/build.linux64x64/<a
href="http://squeak.cog.spur/build/squeak"
moz-do-not-send="true">squeak.cog.spur/build/squeak</a>
-vm-sound-pulse myimage</span></span></span></span><br>
</p>
<div><br>
</div>
<div>Good news - I get sound!<br>
</div>
<div><br>
</div>
<div>Bad news - Well it seems a bit drunk in that it pauses about
every second to two. It acts like a buffering issue. It is
slightly worse without doing the RT priority limits.conf file.<br>
</div>
<div><br>
</div>
<div>I'll also poke at this a bit.<br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>cheers<br>
</div>
<div><br>
</div>
<div>bruce</div>
<div id="editorUserSignature" style="display:none;"><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><i>25 December 2020 05:41 tim Rowledge
<a class="moz-txt-link-rfc2396E" href="mailto:tim@rowledge.org"><tim@rowledge.org></a> wrote:</i><br>
</div>
<blockquote class="infmailquote">
<div><br>
</div>
<div><br>
</div>
<div>> On 2020-12-24, at 1:21 PM, Herbert König wrote:<br>
</div>
<div> ><br>
</div>
<div> > Ha, ran the script in a terminal and on each piano
keypress I get:<br>
</div>
<div> > sound_Start(default)<br>
</div>
<div> > soundStart: snd_add_pcm_handler: Function not
implemented.<br>
</div>
<div> <br>
</div>
<div> That's an error to do with some asynchronous handler stuff
in alsa. I have no idea why it would fail.<br>
</div>
<div> <br>
</div>
<div> All in all this sound stuff is getting very, very,
frustrating<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div> tim<br>
</div>
<div> --<br>
</div>
<div> tim Rowledge; <a class="moz-txt-link-abbreviated" href="mailto:tim@rowledge.org">tim@rowledge.org</a>;
<a class="moz-txt-link-freetext" href="http://www.rowledge.org/tim">http://www.rowledge.org/tim</a><br>
</div>
<div> Strange OpCodes: NOP: Randomize the PSW and then branch<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div> <br>
</div>
</blockquote>
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</div>
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