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<div class="moz-cite-prefix">On 10/24/2013 01:20 AM, Leszek Lesner
wrote:<br>
</div>
<blockquote cite="mid:20131024072005.5009550.89629.3510@web.de"
type="cite">
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);">Tryout the
terminal command</div>
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);"><br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);">Cat
/proc/cpuinfo</div>
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);"><br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);">If this shows
processor 0 and a processor 1 the system recognized two CPUs and
is using them.</div>
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);">The Qsynth
through pulseaudio thing is bad as it had (from my experience
till pulseaudio 2.0) a bad latency. Use Alsa here instead (needs
to suspend pulseaudio first) and test again.</div>
<div style="width: 100%; font-size: initial; font-family: Calibri,
'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align:
initial; background-color: rgb(255, 255, 255);"><br
style="display:initial">
</div>
</blockquote>
I browsed (using the file browser) to /proc, and double-clicked the
cpuinfo file. <br>
<br>
It showed "Intel Core Duo 2" (something like that - I'm going from
memory), and the number of cores was displayed as 1. Information
(options such as pae) was shown only for one CPU. <br>
<br>
I then tried booting the Ubuntu 13.04 amd64 live CD. <br>
<br>
When I hold down the Options key while powering up, with Ubuntu,
there are two icons having the round CD icon at the right. The
first of those two, is labeled "Windows". The second is labeled
"EFI Boot". <br>
<br>
I booted the Ubuntu 13.04 DVD using the first ("Windows") CD icon.
<br>
<br>
It came up, and ran fine, but system-monitor showed only 1 CPU, and
the "/proc/cpuinfo" file agreed with that assessment. There were no
desktop hangs observed. <br>
<br>
I shut it down, and (again holding down the "Options" key when it
powers-up) this time I selected the "EFI Boot" CD icon at the far
right of the list. <br>
<br>
It immediately showed a text line saying secure boot was not
available, and then presented me with a text menu with entries (as I
recall):<br>
<br>
Try Ubuntu<br>
Install Ubuntu<br>
Check Disk for Defects<br>
<br>
I chose "Try Ubuntu", and it booted (eventually) directly into
Ubuntu Unity desktop. In this case, system-monitor showed two
CPU's, and the "/proc/cpuinfo" file also showed two cores (and
info/options about each of them). <br>
<br>
However, after awhile running, the desktop hung, and I could not do
anything further but power down (I did wait quite awhile for it to
un-freeze). <br>
<br>
I then tried the Lubuntu 13.10 amd64-mac live DVD, wanting to try
the "EFI Boot" option, but only the "Windows" CD icon was
available. On booting this CD, only one CPU was available. <br>
<br>
I also tried selecting rEFIt on power-up, and it showed the Linux
penguin icon (for the Linux partition on the hard disk), and also
another penguin icon at the far right, which when highlighted,
indicated it was on CD (DVD). I selected this (far right) icon, and
booted it. <br>
<br>
When it came up, it had only one CPU (the "/proc/cpuinfo" file
indicated that the number of cores was "1"). The system did not
hang in the time I was using it. <br>
<br>
<br>
Regarding my use of PulseAudio, I install it so that I can access
the Java Sound (Gervill) synthesizer. If I don't load PulseAudio
(and pavucontrol), I cannot use that synthesizer. On all Ubuntu
variants, the Java Sound synthesizer expects PulseAudio to be used.
<br>
<br>
When I re-configured Qsynth to use JACK, there were no more cut-outs
on the sound. But I (as always with Linux on this MacBook) would
only produce audible sound with the laptop speakers - plugging in
the amplifier cable into the headphone jack effectively shut off all
sound. <br>
<pre class="moz-signature" cols="72">--
Sincerely,
Aere</pre>
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