glitchbit Posted February 20, 2008 Share Posted February 20, 2008 Well I haven't seen many if any specific threads regarding this but what is the outlook for us Dual Processor users being able to use our full processor in OSX? I have only seen one case where some nforce users got around it some how eventually with a hacked kernel. I want to know if there is anything we can do to bring about more fixes for more motherboards? Link to comment Share on other sites More sharing options...
federal Posted February 20, 2008 Share Posted February 20, 2008 From what I've heard OSX uses both cores. The problem is with System Profiler. Link to comment Share on other sites More sharing options...
glitchbit Posted February 24, 2008 Author Share Posted February 24, 2008 I can not see that being the case. If it was no one would care if they had to do cpus=1. Link to comment Share on other sites More sharing options...
Deviant0ne Posted February 24, 2008 Share Posted February 24, 2008 I am using both cores of my processor, as are many other users... What type of processor are you having problems with? Link to comment Share on other sites More sharing options...
Rufus T. Firefly Posted February 24, 2008 Share Posted February 24, 2008 I've never had to use that command. Link to comment Share on other sites More sharing options...
naddy69 Posted February 24, 2008 Share Posted February 24, 2008 Yes, rest assured that if you have to use cpus=1 to boot, then OS X is in fact using only 1 core. I have a Core 2 Quad system that I have to use cpus=1 with. OS X shows it as a "Core 2 Solo"! Everything else on this box works fine - LAN, Sound, USB, QE/CI video with a Radeon HD2600Pro. I've pretty much given up on ever using all 4 cores with OS X - at least with the current versions. It's a MB/BIOS issue AFAIK. Maybe future versions will work. For now, OS X 10.5.1 runs fine for my uses. Any heavy duty stuff I do on Vista64 anyways , so it's no big loss for me. Link to comment Share on other sites More sharing options...
Deviant0ne Posted February 24, 2008 Share Posted February 24, 2008 It's a MB/BIOS issue AFAIK. It is indeed. I used to use an ASRock MoBo that needed the cpus=1 command to even somewhat boot, but as soon as I replaced it with my current Gigabyte board, everything runs flawlessly. Link to comment Share on other sites More sharing options...
ovof Posted February 24, 2008 Share Posted February 24, 2008 Same pb here, with T5500 CPU on laptop NC6400 In fact, it can boot and reach the GUI. Everything works. Then ramdomely, it freezes. I think it's an issue with cpu power management. Link to comment Share on other sites More sharing options...
Xenova Posted February 24, 2008 Share Posted February 24, 2008 Intrestingly, I got around the CPUS=1 problem by turning off Throtting and SpeedStep (i shouldn't have them on since my system is overclocked, but I like being akward) in my BIOS, after that i didnt need to use the "CPUS=1" parameter anymore, yet fixing that im now at another knot im trying to untangle... Link to comment Share on other sites More sharing options...
ovof Posted February 24, 2008 Share Posted February 24, 2008 Well, i cant disable speedstep nor anything else in bios Speedstep is enabled in bios, i verified under osx by adressing MSR of the CPU. If i disable it inside ther kernel, it crash & reboot... I'm trying others things, i'll tell you Link to comment Share on other sites More sharing options...
S.SubZero Posted February 24, 2008 Share Posted February 24, 2008 From what I have seen, this problem has been around since the early days of OSX86 and it's not likely to go away anytime soon. My Dell Inspiron E1705 is plagued with this problem (in fact the tutorial thread goes into great detail about it) but my new Sager 5793 laptop doesn't do it; I get full Penryn dual-core goodness. There appears to be some fluctuation in how PC makers implement their BIOS, and it's the BIOS that's somehow causing it. Link to comment Share on other sites More sharing options...
kababoom Posted February 27, 2008 Share Posted February 27, 2008 Xenova is right.. Except that in my case (Asus P5W DH) it was not the 'Intel Speedstep' setting but the 'Execute Disable Function' this needs to be set to: ENABLED Description of setting (for other MB owners): No-Execution Page protection Technology - is able to force the XD feature flag to always return 0. Overview of other settings on this bios page: (defaults) Modify Ratio Support: Disabled Microcode Updation: Enabled Max CPUID Value Limit: Disabled Execute Disable Function: ENABLED Enhanced C1 Control: Auto Virtualization Technology: Enabled (grey) Intel® Speedstep tech: Enabled Got 2 cores of my C2D working now. Hope this helps http://forum.insanelymac.com/style_emotico...ault/tongue.gif Link to comment Share on other sites More sharing options...
badboyz Posted February 27, 2008 Share Posted February 27, 2008 i am having this same problem and so far everything i tried idnt work Link to comment Share on other sites More sharing options...
kaiou Posted April 29, 2008 Share Posted April 29, 2008 Hallo same problem, no solution found.. i have a t5600 on hp nc6320 notebook.. Nothing bios config.. Link to comment Share on other sites More sharing options...
Ishimaru Posted April 29, 2008 Share Posted April 29, 2008 Q9300 here, and I don't have to use that flag. Everything works just fine. Link to comment Share on other sites More sharing options...
hackpc Posted December 28, 2008 Share Posted December 28, 2008 Really want to use more than 1 core I'm using 'AMD Phenom x3 (8650, Triple core)' with 'iDeneb 10.5.5' When I installed "cpus=1 fix" package from disk at first intall, it woks fine, but it used only 1 core. If I choose not to install "cpus=1 fix" and first stage then, I can't boot, it makes kernel panic. So, I must give a boot option like a "cpus=1" Is there any workaround? Link to comment Share on other sites More sharing options...
realityiswhere Posted December 28, 2008 Share Posted December 28, 2008 Make sure you're using an appropriate kernel for your processor (voodoo kernel is best, http://code.google.com/p/xnu-dev/ for any processor, including AMD), and if that still does not solve it, it could possibly be a DSDT table issue in the BIOS, check this post on how to patch it without re-writing your whole BIOS http://forum.insanelymac.com/index.php?sho...133683&st=0 Link to comment Share on other sites More sharing options...
hackpc Posted December 29, 2008 Share Posted December 29, 2008 Make sure you're using an appropriate kernel for your processor (voodoo kernel is best, http://code.google.com/p/xnu-dev/ for any processor, including AMD), and if that still does not solve it, it could possibly be a DSDT table issue in the BIOS, check this post on how to patch it without re-writing your whole BIOS http://forum.insanelymac.com/index.php?sho...133683&st=0 Thanks for reply!!! I used the installed kernel with Ideneb 10.5.5 and tried with Voodoo 9.5.0 release, couldn't get good result. Anyway, I would like to try DSDT workaround. Thanks again for advice, Good day~ Link to comment Share on other sites More sharing options...
UnaClocker Posted December 29, 2008 Share Posted December 29, 2008 This problem is very common with Asus boards, there are patched versions of the BIOS for most all the common Asus boards, so that you can use both cores naturally again. Link to comment Share on other sites More sharing options...
hackpc Posted January 2, 2009 Share Posted January 2, 2009 Thanks for reply!!! I used the installed kernel with Ideneb 10.5.5 and tried with Voodoo 9.5.0 release, couldn't get good result. Anyway, I would like to try DSDT workaround. Thanks again for advice, Good day~ Just for update, still couln't get it even DSDT, b/c DSDT doesn't work for my unit. no .aml just ,dsl created, I couldn't deal with it. Link to comment Share on other sites More sharing options...
siaziz Posted January 25, 2009 Share Posted January 25, 2009 hi guys..... I have a problem like that.. i'm using acer travelmate 6291 Core 2 Duo @T5500 with all distro osx86 hackintosh (iDeneb, Kalyway, XxX 10.5.5, XxX 10.5.6 ppf latest, iPC 10.5.6 latest) i think this problem with my proc @T5500... always cpus=1 i waiting and hope any solution with my rig thanks for insanely... & u all.. Link to comment Share on other sites More sharing options...
Mr. Glitch Posted February 6, 2009 Share Posted February 6, 2009 Except that in my case (Asus P5W DH) it was not the 'Intel Speedstep' setting but the 'Execute Disable Function' this needs to be set to: ENABLED I can confirm that setting "Execute Disable Function" to "ENABLED" fixes the issue of having to enter "cpus=1" at boot screen. This is using an ASUS P5W DH Deluxe motherboard at least. Thanks kababoom! Link to comment Share on other sites More sharing options...
annda Posted February 24, 2009 Share Posted February 24, 2009 I can confirm that setting "Execute Disable Function" to "ENABLED" fixes the issue of having to enter "cpus=1" at boot screen. This is using an ASUS P5W DH Deluxe motherboard at least. Thanks kababoom! thank you too, kaboom! it's working on a Samsung X11 laptop, my life is so much easier now... Link to comment Share on other sites More sharing options...
dr.vox Posted February 24, 2009 Share Posted February 24, 2009 I have the same problem as ovof: everything works fine, both cores register, boots to GUI and then after an hour or so it'll randomly kernel panic (I think it complains about memory swapping or something). I should probably write down the details next time I bother to boot into cpus=2. I'll also try disabling speedstep and have a look if I can find Execute Disable Function, but I don't think I have that. I know for a fact that Speedstep is enabled though, but I'm on an Intel P965 chipset, so it may not fix it if it's just an Asus problem. EDIT: Disabled both BIOS settings. Uptime of 2 hours with cpus=2. Hoping this is a permanent fix. Wait, I already had both Speedstep and Execute Disable Function enabled but kababoom said to enable it... Oh well, maybe it was Speedstep. Or maybe it's not even fixed... Whatever, if it works it works. EDIT2: 7 hours uptime. Going to bed now. Fingers crossed I'll find it still working fully in the morning. EDIT3: Yeah, it was still working in the morning. But for some reason my Ralink RT73 chipset wireless USB dongle seems to disconnect itself roughly 10 mins after I leave for school in the morning but is fine during the night... (did it before i disabled those BIOS things and also happens when I boot cpus=1) ... Anyway, as soon as this happened, the system froze. It seems to be after the computer goes idle. So I've booted with idlehalt=0 to keep the CPU going no matter what. Maybe this will solve it. EDIT4: Kernel panic when I got home today, it crashed at 2:18ish, so roughly six hours of working alone, which bodes very well. KP was the 'm_free: freeing an already freed mbuff' or whatever it is. This might be because I re-enabled Speedstep and Execute Disable Function as I guessed it wasn't them affecting it. Disabling Execute Disable Function seems to make my computer take a good 60-90 seconds to find and register my three SATA devices which means I'm sat waiting doing nothing for that time. Really annoying. Disabled Speedstep, hopefully this will be it. Link to comment Share on other sites More sharing options...
almond Posted August 25, 2009 Share Posted August 25, 2009 For my acer tm 6291, after using a USB ethernet card, don't need to add cpus=1, it works with 2 cpus. that is an easy way i think. but still don't know why? Link to comment Share on other sites More sharing options...
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