A port for macOS of Synaptic's RMI Trackpad driver from Linux. This works for both I2C HID trackpads from Synaptic as well as Synaptic's SMBus trackpads. When following the instructions below, make sure you only select I2C or SMBus depending on your trackpad's capabilities.
Synaptic trackpads generally work over SMBus or I2C, though not both. Pay close attention to which bus it works over.
SMBus
macOS (Requires Acidanthera's VoodooPS2 version 2.3.6 or above):
ApplePS2SynapticsTrackpad
, and look for the value Intertouch Support=True
sudo dmesg
to see this)Windows:
Linux:
i2c-tools
from your package manager. Run i2cdetect -l
, and note the number for SMBus (It's usually zero). Run i2cdetect #
where # is the number you got from running the prior command. Synaptic devices are always at address 0x2c, so check at that address for anything other than --
. It will usually appear as UU
in my experiance if it's a Synaptics device.
dmesg
and find a message along the lines of "Your touchpad x says it can support a different bus."
and it's a Synaptics trackpad.I2C
macOS:
VoodooI2CHIDDevice
has HIDDescriptor
containing VendorID
0x6cb
, orVoodooI2CHIDDevice
has name
containing SYN
or SYNA
Windows:
HID-compliant touch pad
in device manager
General
- location
is on I2C HID Device
and Details
- Hardware Ids
contains VID_06CB
(or SYN
, SYNA
)Linux:
i2c-SYN
in dmesg
.i2c-tools
from your package manager, and use the i2cdetect
tool to see if there are any devices at address 0x2c for any bus that isn't SMBus. If you see it under SMBus, I'd use SMBus as the trackpad seemingly operates better under SMBus!SMBus
I2C
Name | Main function |
---|---|
SYN1B7F |
F12 |
SYNA0000 |
F11 |
SYNA1202 |
F12 |
SYNA2393 |
unknown |
SYNA2B2C |
F12 |
SYNA2B31 |
F12 |
SYNA2B33 |
F11 |
SYNA2B5A |
F12 |
SYNA2B61 |
F11 |
SYNA2B34 |
unknown |
SYN3054 |
F11 |
SYNA3083 |
F12 |
SYNA3105 |
unknown |
SYNA328B |
F12 |
SYNA328E |
F12 |
SYNA3602 |
unknown |
SYNA7500 |
unknown |
SYNA7501 |
unknown |
SYNA7DAB |
F12 |
SYNA7DB5 |
F12 |
1) Add the required kexts to your bootloader 2) Make sure VoodooPS2 is configured as below:
There is no support for this kext being loaded into Library/Extensions or System/Library/Extensions. This likely won't break loading it, but test with injection first before sending in a bug report.
The values below can be configured through either ioio
or ACPI. An example SSDT can be found under the ACPI examples folder.
Note that using non-integer value causes undefined behaviour which may prevent the kext from loading
Value | Default | Description |
---|---|---|
ForceTouchType |
1 | Controls how force touch emulation behaves. 0 = Disabled, 1 = Clickpad press with size threshold, 2 = size threshold only |
ForceTouchMinPressure |
90 | Minimum z value to trigger Force touch when clickpad is clicked |
DisableWhileTypingTimeout |
250 | Milliseconds after typing in which to reject trackpad packets |
DisableWhileTrackpointTimeout |
250 | Milliseconds after using the trackpoint in which to reject trackpad packets |
TrackpointMultiplier |
20 | Multiplier used on trackpoint inputs (other than scrolling). This is divided by 20, so the default value of 20 will not change the output value at all |
TrackpointScrollMultiplierX |
20 | Multiplier used on the x axis when middle button is held down for scrolling. This is divided by 20. |
TrackpointScrollMultiplierY |
20 | Same as the above, except applied to the Y axis |
TrackpointDeadzone |
1 | Minimum value at which trackpoint reports will be accepted. This is subtracted from the input of the trackpoint, so setting this extremely high will reduce trackpoint resolution |
MinYDiffThumbDetection |
200 | Minimum distance between the second lowest and lowest finger in which Minimum Y logic is used to detect the thumb rather than using the z value from the trackpad. Setting this higher means that the thumb must be farther from the other fingers before the y coordinate is used to detect the thumb, rather than using finger area. Keeping this smaller is preferable as finger area logic seems to only be useful when all 4 fingers are grouped together closely, where the thumb is more likely to be pressing down more |
PalmRejectionMaxObjWidth |
255 | Max contact width before contact is considered accidental. This value can be acquired by experimentation using Rehabman's ioio . |
PalmRejectionMaxObjHeight |
255 | Max contact height before contact is considered accidental. This value can be acquired by experimentation using Rehabman's ioio . |
PalmRejectionWidth |
10 | Percent (out of 100) width of trackpad which is used as a low confidence zone on the left and right side of the trackpad |
PalmRejectionWidth |
60 | Percent (out of 100) height of trackpad which is used as a low confidence zone on the left and right side of the trackpad (starting from the top) |
PalmRejectionTrackpointHeight |
20 | Percent (out of 100) height of trackpad which is used as a low confidence zone across the top of the trackpad |
Note that you can use Rehabman's ioio to set properties temporarily (until the next reboot).
ioio -s RMIBus ForceTouchType 0
ioio -s RMIBus PalmRejectionMaxObjWidth 5
ioio -s RMIBus PalmRejectionMaxObjHeight 6
1) git submodule update --init --recursive
2) git clone --depth 1 https://github.com/acidanthera/MacKernelSDK
2) Build within XCode using the play button in the top left
For loading, you may need to put RMII2C/RMISMBus's dependencies into the kextload command. Note that RMISMBus/RMII2C depend on VoodooRMI.
The below examples assume VoodooSMBus/VoodooI2C are in the same folder as VoodooRMI. If they are not, you will need to give the path to those kexts. When manually loading from within macOS, keep in mind that csrutil needs to be partially disabled to allow unsigned kexts, and the kexts need to be owned by Root.
// Note that this changes the owner of every kext in the directory your in
sudo chown -R root:wheel *.kext
Example for SMBus:
cd path/to/unziped-VoodooRMI_Debug
sudo kextutil -vvvv -d VoodooRMI.kext -d VoodooSMBus.kext VoodooRMI.kext/Contents/PlugIns/RMISMBus.kext
Example for I2C:
sudo kextutil -vvvv -d VoodooRMI.kext -d VoodooI2C.kext VoodooRMI.kext/Contents/PlugIns/RMII2C.kext
For unloading, you can use the bundle ids. This should unload cleanly, though you may need to unload twice in a row to get it to cooperate.
sudo kextunload -vvvv -b com.1Revenger1.RMISMBus -b com.1Revenger1.VoodooRMI
Before creating an issue, please check the below: 1) Make sure VoodooSMBus/VoodooI2C is loading and attaching
kextstat | grep Voodoo
3) You may need to do IRQ patching on Haswell and older devices for SMBus trackpadsSBUS
device does not have any IOInterruptControllers in IORegistryExplorerIf the above are loading, next place to check is within the IORegistry and within VoodooRMI logs: 1) Use IORegistryExplorer to check what is attaching and loading.
File -> Save As
in the top left
2) Get logs from within macOSkextload
or kextutil
within macOS, you can use sudo log show --last boot | grep VRMI
msgbuf=1048576
. Once in macOS, use sudo dmesg | grep VRMI
immediately after booting to get the logs.When creating an issue, you will need to provide log files (IORegs not required but helpful)!