- Joined
- Jul 6, 2011
- Messages
- 5
- Motherboard
- Lenovo Thinkpad Yoga 20CD0038KR
- CPU
- i7-4500U/Haswell-ULT
- Graphics
- Intel HD 4400, 1920x1080
- Mac
- Classic Mac
- Mobile Phone
[SOLVED] Broken speedstep on Lenovo ThinkPad Yoga
Hello,
I'm trying to use Mavericks on Lenovo ThinkPad Yoga (TPY in short).
The model number is 20CD0038KR and its specs are following:
- CPU: i7-4500u (1.8GHz, turbo 3.0GHz, 15W TDP, 2 cores, 4 threads)
- OS: Windows 8.1 Pro 64
- Display: 12.5" FHD IPS with multitouch and wacom digitizer
- Graphics: Intel HD Graphics 4400
- Memory: 8GB DDR3L
- Storage: 256GB SSD
- and so on: http://shop.lenovo.com/us/en/laptops/thinkpad/yoga-series/yoga/#techspecs
I managed to install Mavericks on it but can't fix speedstep.
The base frequency is set to 2.4GHz and the whole system is laggy.
More specifically, it seems that it becomes very slower as soon as "SMC: successfully initialized" is printed on the diagnostic screen during the OS X boot.
HWMonitor shows cores are about 70 degree Celsius and their clocks are ranging from 2.2GHz ~ 2.6GHz.. It seems that they are always turbo boosting... But the system is very slow. In the Activity Monitor app, the CPU usage is 100% even for a small job (e.g. launching text editor).
DPCIManager fails to get P States with DMIDecode error and the log window appears and reports there are three P states, 18, 24 and 27 after a few seconds. SMCMonitor shows nothing in the P & C states window.
One more thing: XCPM seems to be activated as dmesg says XCPM: registered and IOPPF: XCPM mode. But kextstat says X86PlatformPlugin and AppleLPC are loaded but not ACPI_SMC_PlatformPlugin.
That's it for my symptom. I used Clover r2652 for the bootloader and ssdtPRgen to patch SSDT (with SSDT/DropOem = TRUE).
I attached my Clover configuration, clover boot log, ioreg (dumped with IORegistryExplorer v2.1), ACPI tables (excluding MSDM, SLIC, UEFI) and dmesg output.
Still there are lots of remaining issues, but I can't continue with this horribly slow OS X.
I'd appreciate any help.
Hello,
I'm trying to use Mavericks on Lenovo ThinkPad Yoga (TPY in short).
The model number is 20CD0038KR and its specs are following:
- CPU: i7-4500u (1.8GHz, turbo 3.0GHz, 15W TDP, 2 cores, 4 threads)
- OS: Windows 8.1 Pro 64
- Display: 12.5" FHD IPS with multitouch and wacom digitizer
- Graphics: Intel HD Graphics 4400
- Memory: 8GB DDR3L
- Storage: 256GB SSD
- and so on: http://shop.lenovo.com/us/en/laptops/thinkpad/yoga-series/yoga/#techspecs
I managed to install Mavericks on it but can't fix speedstep.
The base frequency is set to 2.4GHz and the whole system is laggy.
More specifically, it seems that it becomes very slower as soon as "SMC: successfully initialized" is printed on the diagnostic screen during the OS X boot.
HWMonitor shows cores are about 70 degree Celsius and their clocks are ranging from 2.2GHz ~ 2.6GHz.. It seems that they are always turbo boosting... But the system is very slow. In the Activity Monitor app, the CPU usage is 100% even for a small job (e.g. launching text editor).
DPCIManager fails to get P States with DMIDecode error and the log window appears and reports there are three P states, 18, 24 and 27 after a few seconds. SMCMonitor shows nothing in the P & C states window.
One more thing: XCPM seems to be activated as dmesg says XCPM: registered and IOPPF: XCPM mode. But kextstat says X86PlatformPlugin and AppleLPC are loaded but not ACPI_SMC_PlatformPlugin.
That's it for my symptom. I used Clover r2652 for the bootloader and ssdtPRgen to patch SSDT (with SSDT/DropOem = TRUE).
I attached my Clover configuration, clover boot log, ioreg (dumped with IORegistryExplorer v2.1), ACPI tables (excluding MSDM, SLIC, UEFI) and dmesg output.
Still there are lots of remaining issues, but I can't continue with this horribly slow OS X.
I'd appreciate any help.