https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282588
--- Comment #2 from Rodrigo Osorio <[email protected]> --- I continue the investigation on this issue with Claude LLM and that's what he discovers: The motherboard supports several touchpad models (Synaptics, Elan, Cirque, Focaltech, Goodix). Consequently, the firmware defers the selection until runtime: the _INI method queries the embedded controller (EC), determines the actual model installed, and then writes the correct _HID and I²C address to the namespace. If the _INI method does not complete execution, _HID remains XXXX0000 and BADR remains zero. This corresponds exactly to the symptom. There is no driver issue here, but a wrong ECDT Namepath ``` devinfo -v | grep -i -B2 ELAN ig4iic0 <Intel Alder Lake-P I2C Controller-0> pnpinfo vendor=0x8086 device=0x51e8 subvendor=0x17aa subdevice=0x384b class=0x0c8000 at slot=21 function=0 dbsf=pci0:0:21:0 handle=\_SB_.PC00.I2C0 iicbus14 <Philips I2C bus (ACPI-hinted)> iichid0 <ELAN06FA:00 04F3:327E I2C HID device> pnpinfo _HID=ELAN06FA _UID=0 _CID=PNP0C50 at addr=0x15 handle=\_SB_.PC00.I2C0.TPD0 hidbus4 <HID bus> hms1 <ELAN06FA:00 04F3:327E Mouse> pnpinfo page=0x0001 usage=0x0002 bus=0x18 vendor=0x04f3 product=0x327e version=0x0004 _HID=ELAN06FA at index=0 unknown pnpinfo page=0xff00 usage=0x0001 bus=0x18 vendor=0x04f3 product=0x327e version=0x0004 _HID=ELAN06FA at index=1 hmt0 <ELAN06FA:00 04F3:327E TouchPad> pnpinfo page=0x000d usage=0x0005 bus=0x18 vendor=0x04f3 product=0x327e version=0x0004 _HID=ELAN06FA at index=2 hconf0 <ELAN06FA:00 04F3:327E Configuration> pnpinfo page=0x000d usage=0x000e bus=0x18 vendor=0x04f3 product=0x327e version=0x0004 _HID=ELAN06FA at index=3 ``` ``` sudo i2c -f /dev/iic14 -s -v Scanning I2C devices on /dev/iic14: 15 ``` Dumping the ECDT table ``` sudo acpidump -b -n ECDT && iasl -d ecdt.dat grep Namepath ecdt.dsl Namepath : "_SB.PC00.LPCB.EC0" ``` The initial \ is missing from the Namepath. I was able to make it work on my computer using a the following sequence ``` sudo kenv acpiprobe.run_ini=1 sudo kldload ./acpiprobe.ko # custom module who execute AcpiEvaluateObject(TPD0, "_INI") sudo kldunload acpiprobe && sudo kenv -u acpiprobe.run_ini sudo kldunload ig4 && sudo kldload ig4 ``` -- You are receiving this mail because: You are the assignee for the bug.
