- Joined
- Apr 12, 2010
- Messages
- 67
- Motherboard
- Lenovo ThinkCentre M73-Clover
- CPU
- i3-4130T/H81
- Graphics
- HD4400
- Mac
- Mobile Phone
Updating an older Toshiba SandyBridge laptop.
This is a simple Intel HD3000 version of the Toshiba L755 not the one with the dedicated NVidia GPU.
It had been running Mountain Lion flawlessly for a long time. I now have Sierra 10.12.6 loaded and most everything looks really good: SpeedStep, audio input and output, LCD backlight control, HDMI video & audio, USB ports, battery power status, you name it.
However, 2 major flaws remain.
1. The laptop reboots when going into sleep. Not when waking from sleep but when initially going into it.
2. The laptop reboots on shutdown.
I have extracted a fresh DSDT as advised in the FAQ and tried all kinds of fixes, patched AICPUPM and RTC kexts, DSDT edits and config.plist entries all to no avail.
This system will even attempt sleeping and then reboot with NullCPUPowerManagement.kext loaded !
There is one thing a little different about this laptop. It sometimes gets into a state where it will not turn on at all, a brick. When this happens, I remove the battery and hold the power button to do an EC reset. Then it starts again just fine.
Every once in a blue moon, it will just lock up, mouse cursor continues to respond but nothing else is happening, even the CPU readings on HWMonitor freeze. I need to do a hard shutdown and then it won't turn back on until I do the EC reset.
Just wondering if it's related, maybe an Embedded Controller related issue with the sleep and shutdown.
I have enclosed support files, DSDT source with comments, CLOVER folder, & IORegistry file.
Thanks in advance to anyone with an idea.
This is a simple Intel HD3000 version of the Toshiba L755 not the one with the dedicated NVidia GPU.
It had been running Mountain Lion flawlessly for a long time. I now have Sierra 10.12.6 loaded and most everything looks really good: SpeedStep, audio input and output, LCD backlight control, HDMI video & audio, USB ports, battery power status, you name it.
However, 2 major flaws remain.
1. The laptop reboots when going into sleep. Not when waking from sleep but when initially going into it.
2. The laptop reboots on shutdown.
I have extracted a fresh DSDT as advised in the FAQ and tried all kinds of fixes, patched AICPUPM and RTC kexts, DSDT edits and config.plist entries all to no avail.
This system will even attempt sleeping and then reboot with NullCPUPowerManagement.kext loaded !
There is one thing a little different about this laptop. It sometimes gets into a state where it will not turn on at all, a brick. When this happens, I remove the battery and hold the power button to do an EC reset. Then it starts again just fine.
Every once in a blue moon, it will just lock up, mouse cursor continues to respond but nothing else is happening, even the CPU readings on HWMonitor freeze. I need to do a hard shutdown and then it won't turn back on until I do the EC reset.
Just wondering if it's related, maybe an Embedded Controller related issue with the sleep and shutdown.
I have enclosed support files, DSDT source with comments, CLOVER folder, & IORegistry file.
Thanks in advance to anyone with an idea.