<div dir="ltr">Hi,<div> </div><div>not being a guy familiar with Mac stuff, are you seeing the error at install? (If so, please try both installer systems) or after the system is installed?</div><div> </div><div>Regards,</div> <div> </div><div>Phill.</div></div><div class="gmail_extra"> <div class="gmail_quote">On 24 October 2013 23:07, Aere Greenway <<a href="mailto:Aere@dvorak-keyboards.com" target="_blank">Aere@dvorak-keyboards.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 10/24/2013 11:57 AM, Nio Wiklund wrote: </div><div><div class="h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On 2013-10-24 19:30, Aere Greenway wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On 10/24/2013 01:20 AM, Leszek Lesner wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Tryout the terminal command Cat /proc/cpuinfo If this shows processor 0 and a processor 1 the system recognized two CPUs and is using them. 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. </blockquote> I browsed (using the file browser) to /proc, and double-clicked the cpuinfo file. 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. I then tried booting the Ubuntu 13.04 amd64 live CD. 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". I booted the Ubuntu 13.04 DVD using the first ("Windows") CD icon. 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. 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. 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): Try Ubuntu Install Ubuntu Check Disk for Defects 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). 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). 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. 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. 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. 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. 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. -- Sincerely, Aere </blockquote> Interesting. It seems there are fundamental problems to run an Ubuntu based OS on this computer. Best regards Nio </blockquote></div></div> Nio, and all: I tried running an openSUSE 12.3 live-DVD on that machine, but it failed to run. I tried Ubuntu/Unity 13.10 i386 on it, and it (like Lubuntu) ends up with only one CPU. On that last attempt, I looked at the system log. I noticed (in particular) "NX (executive disable) is active". Also, in the log, I extracted the following section, which seems relevant to the multi-processor problem: Oct 24 21:05:35 ubuntu kernel: [ 0.020314] CPU: Physical Processor ID: 0 Oct 24 21:05:35 ubuntu kernel: [ 0.020316] CPU: Processor Core ID: 0 Oct 24 21:05:35 ubuntu kernel: [ 0.020321] mce: CPU supports 6 MCE banks Oct 24 21:05:35 ubuntu kernel: [ 0.020332] CPU0: Thermal monitoring enabled (TM2) Oct 24 21:05:35 ubuntu kernel: [ 0.020347] Last level iTLB entries: 4KB 128, 2MB 4, 4MB 4 Oct 24 21:05:35 ubuntu kernel: [ 0.020347] Last level dTLB entries: 4KB 256, 2MB 0, 4MB 32 Oct 24 21:05:35 ubuntu kernel: [ 0.020347] tlb_flushall_shift: -1 Oct 24 21:05:35 ubuntu kernel: [ 0.020791] Freeing SMP alternatives memory: 28K (c1a3e000 - c1a45000) Oct 24 21:05:35 ubuntu kernel: [ 0.024023] ACPI: Core revision 20130517 Oct 24 21:05:35 ubuntu kernel: [ 0.031484] ACPI: All ACPI Tables successfully acquired Oct 24 21:05:35 ubuntu kernel: [ 0.031762] ftrace: allocating 27134 entries in 53 pages Oct 24 21:05:35 ubuntu kernel: [ 0.044112] Enabling APIC mode: Flat. Using 1 I/O APICs Oct 24 21:05:35 ubuntu kernel: [ 0.044586] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 Oct 24 21:05:35 ubuntu kernel: [ 0.084546] smpboot: CPU0: Intel(R) Core(TM)2 Duo CPU P7350 @ 2.00GHz (fam: 06, model: 17, stepping: 0a) Oct 24 21:05:35 ubuntu kernel: [ 0.088000] Performance Events: PEBS fmt0+, 4-deep LBR, Core2 events, Intel PMU driver. Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... version: 2 Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... bit width: 40 Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... generic registers: 2 Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... value mask: 000000ffffffffff Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... max period: 000000007fffffff Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... fixed-purpose events: 3 Oct 24 21:05:35 ubuntu kernel: [ 0.088000] ... event mask: 0000000700000003 Oct 24 21:05:35 ubuntu kernel: [ 0.088000] CPU 1 irqstacks, hard=f50e6000 soft=f50f0000 Oct 24 21:05:35 ubuntu kernel: [ 0.088000] smpboot: Booting Node 0, Processors #1 OK Oct 24 21:05:35 ubuntu kernel: [ 5.178391] smpboot: CPU1: Not responding Oct 24 21:05:35 ubuntu kernel: [ 5.178411] Brought up 1 CPUs Oct 24 21:05:35 ubuntu kernel: [ 5.178414] smpboot: Total of 1 processors activated (3979.99 BogoMIPS) Oct 24 21:05:35 ubuntu kernel: [ 5.178532] NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter. Oct 24 21:05:35 ubuntu kernel: [ 5.180156] devtmpfs: initialized -- Sincerely, Aere<div class="HOEnZb"><div class="h5"> -- Lubuntu-users mailing list <a href="mailto:Lubuntu-users@lists.ubuntu.com" target="_blank">Lubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/lubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/lubuntu-users <div> </div>-- <a href="https://wiki.ubuntu.com/phillw" target="_blank">https://wiki.ubuntu.com/phillw</a> </a> </div></div></blockquote></div></div>