justfred Posted November 26, 2008 Share Posted November 26, 2008 After I install Kalway 10.5.2, my system runs fine. After I reboot it is very slow - until I leave the computer and it goes to sleep. When I wake it up it is ok again. I found a thread saying it was the graphics card but I'm not convinced. I thought maybe the CPU was being clocked down to a slower speed or maybe the SSE3 emulation is poor. Still, it's odd that it works really well after the installation. So I tried numerous other kernels; I tried all of the others installed with Kalway with no success. I tried a few others (netkas?) and they all had the same problem. I've done side by side comparisons of kextstat after the installation and after the reboot but I couldn't see anything obvious. I've tried numerous options when booting: platform=x86pc, platform=acpi, -x, -f etc. None make a difference. So I was wondering if anyone has managed to get similar hardware working or if anyone has any ideas as to whether it is a power management issue and the CPU is being clocked down. Or maybe the front side bus is clocked down? AMD64 3200 MSI K8N NEO2 Platinum 2Gb NVIDIA GeForce 6600GT 20Gb PATA (SATA drives disabled in bios as it won't boot with them enabled) Thanks Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/ Share on other sites More sharing options...
justfred Posted November 27, 2008 Author Share Posted November 27, 2008 It's definitely not the FSB. It's correctly set to 200MHz and if I change it, it won't boot. It must be clocking down the CPU or graphics card, or it's something related to the hard disk. Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-979587 Share on other sites More sharing options...
justfred Posted November 28, 2008 Author Share Posted November 28, 2008 I discovered the pmset command, so typing: sudo pmset sleepnow Will immediately put the system to sleep. Move the mouse and the PC wakes up and it is running at normal speed again. Not exactly a solution, but a workaround. I guess it would be possible to automatically run pmset after booting up and then scheduling the computer to wake up in 1 minute. Again a fudge and not a solution. I'll try to investigate which hardware component is the culprit using this command when I get time. Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-980719 Share on other sites More sharing options...
josephien Posted November 28, 2008 Share Posted November 28, 2008 i've also read a thread where they suspect the video, the guy in question also has an geforce 6600 card (if i'm not mistaken) you can set a hot spot (any corner) of your screen to "instant" sleep, so you don't have to put in a command... see in your preferences screen options greetz Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-980733 Share on other sites More sharing options...
justfred Posted November 28, 2008 Author Share Posted November 28, 2008 Yeah I know about the hot spot. I tried that but it didn't increase performance. I need to try that again - maybe I didn't leave it sleeping long enough before I woke it up. I noticed on mine that when it does sleep, I have to leave it for a while (>10s e.g.) otherwise performance is the same. Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-980975 Share on other sites More sharing options...
justfred Posted November 29, 2008 Author Share Posted November 29, 2008 I threw in an ATI Radeon 9600XT and I get the same problem. So it's either the hard disk, the CPU or the motherboard. Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-982179 Share on other sites More sharing options...
josephien Posted November 30, 2008 Share Posted November 30, 2008 agp bus? Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-982636 Share on other sites More sharing options...
justfred Posted December 1, 2008 Author Share Posted December 1, 2008 Possibly. I have no idea how to identify if the bus is the problem. The same thing happens under Leo4All. I think I'll have to compare my hardware to others with the same issue. Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-983897 Share on other sites More sharing options...
justfred Posted December 3, 2008 Author Share Posted December 3, 2008 I think the problem might be NVIDIA's Powermizer technology. A bug in NVIDIA's driver might result in the graphics card being configured for low power consumption, which results in poor performance. Then when the computer sleeps and is woken up, Powermizer reconfigures the card for maximum performance. I don't know how to prove this or how to fix it. Is there anyway to change the Powermizer configuration for a card? Or anyway to modify registers on the card (or whatever it would take)?. I think the Linux driver provides an API that lets you configure Powermizer and the WinXP driver reads registry key(s) that do the same. But on OSX? No idea! Anyone? Cheers Link to comment https://www.insanelymac.com/forum/topic/138264-cpu-clocked-down-by-kernelpower-management/#findComment-986471 Share on other sites More sharing options...
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