MacFrugal Posted January 11, 2008 Share Posted January 11, 2008 I just got it installed, it seemed to work fine; however, it gets a Kernel Panic at boot. I tried reinstalling without Speedstep - same deal. I can boot into Leopard in safe mode though using -x. I'm a total noob - appreciate any help. Thanks. Here's the message I get in -v: ACPICPUThrottle: ACPI returns no ACPI throttling available ACPICPUThrottle: Intel processor detected, family=6 model=f ACPICPUThrottle: Using direct drive of Intel Speed Step Technology ACPICPUThrottle: Setting CPU0 to powerstate 1 ACPICPUThrottle: rtc_cycle_count=75000000, newcount=50000000, cutoff=50000000 panic (cpu 1 caller 0x5B2DE24): "rtc_clock_stepping unsupported"@/SourceCache/xnu/xnu-12280.2/osfmk/i386/rtclock.c:263 Debugger called: (panic) ----------- Lenovo ThinkPad R61i 7650 - Core 2 Duo T5250 1.5 GHz - 15.4" TFT 2 MB - L2 cache 4 GB (installed) - DDR II SDRAM - 667 MHz - PC2-5300 ( 1 x 512 MB ) 80 GB - Serial ATA-150 - 5400 rpm CD-RW / DVD-ROM combo 15.4" TFT active matrix 1280 x 800 ( WXGA ) - 24-bit (16.7 million colors) Intel GMA X3100 Sound card Fax / modem - CDC - 56 Kbps Network adapter - Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g Intel PRO/Wireless 3945ABG Keyboard, TrackPoint, UltraNav Link to comment https://www.insanelymac.com/forum/topic/81136-iatkos-10i-r2-acpicputhrottle-kernel-panic-at-boot/ Share on other sites More sharing options...
pepepaco Posted January 12, 2008 Share Posted January 12, 2008 Exactly the same problem with my Dell XPS m1330. Macgirl suggested removing the ACPICPUThrottle kext which should be in the extensions folders but when I tried "sudo mv ACPICPUThrottle.kext ACPICPUThrottle.kext.post" I get a "no such file or directory" message. I must be missing something really obvious. Link to comment https://www.insanelymac.com/forum/topic/81136-iatkos-10i-r2-acpicputhrottle-kernel-panic-at-boot/#findComment-576402 Share on other sites More sharing options...
MacFrugal Posted January 13, 2008 Author Share Posted January 13, 2008 Any thoughts? Link to comment https://www.insanelymac.com/forum/topic/81136-iatkos-10i-r2-acpicputhrottle-kernel-panic-at-boot/#findComment-577696 Share on other sites More sharing options...
pepepaco Posted January 13, 2008 Share Posted January 13, 2008 Finally found ACPICPUThrottle.kext in /library/speedstep directory Link to comment https://www.insanelymac.com/forum/topic/81136-iatkos-10i-r2-acpicputhrottle-kernel-panic-at-boot/#findComment-577911 Share on other sites More sharing options...
MacFrugal Posted January 14, 2008 Author Share Posted January 14, 2008 Is removing this kext the solution to the problem or is there a more appropriate fix? Or, in other words, do I need this kext to avoid frying my motherboard? Link to comment https://www.insanelymac.com/forum/topic/81136-iatkos-10i-r2-acpicputhrottle-kernel-panic-at-boot/#findComment-578659 Share on other sites More sharing options...
pepepaco Posted January 16, 2008 Share Posted January 16, 2008 I installed iatkos v1.0i r2 and that seems to have solved the problem Link to comment https://www.insanelymac.com/forum/topic/81136-iatkos-10i-r2-acpicputhrottle-kernel-panic-at-boot/#findComment-581300 Share on other sites More sharing options...
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