Recently I bought a Lenovo laptop 300w gen 3 (82J1). This computer comes with Windows pre-installed. When testing the computer with a live usb, I soon noticed that the touchpad was not working. I tested several distros, and in none the touchpad worked. I then installed Debian Sid, preserving the original Windows installation.
My first suspicion was that with a BIOS update the problem would be solved. I installed the latest version (GACN43WW) and disabled Secure Boot, Fast Boot, etc. None of it worked.
As you can see, lspci and lsusb do not list the touchpad (ELAN0642):
Code:
lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 IOMMU
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0]
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Internal PCIe GPP Bridge 0 to Bus A
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 7
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822CE 802.11ac PCIe Wireless Network Adapter
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Picasso/Raven 2 [Radeon Vega Series / Radeon Vega Mobile Series] (rev e9)
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio Controller
02:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) Platform Security Processor
02:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Raven2 USB 3.1
02:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor
02:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller
02:00.7 Non-VGA unclassified device: Advanced Micro Devices, Inc. [AMD] Sensor Fusion Hub
Code:
lsusb
Bus 002 Device 003: ID 0bda:0316 Realtek Semiconductor Corp. Card Reader
Bus 002 Device 002: ID 0bc2:2322 Seagate RSS LLC SRD0NF1 Expansion Portable (STEA)
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 30c9:0028 Luxvisions Innotech Limited Integrated Camera
Bus 001 Device 003: ID 0bda:c123 Realtek Semiconductor Corp. Bluetooth Radio
Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I tried adding parameters to the kernel boot that in many cases worked for similar laptops (Lenovo Ideapad). I tried several (pci=nocrs, i8042.nopnp=1, i8042.nomux=1, i8042.reset), but nothing worked.
During boot, before systemd starts, an acpi interface error message appears on the screen. Using journalctl, the following appears:
Code:
Jan 27 14:24:08 kernel: ACPI BIOS Error (bug): Failure creating named object [\CDAT], AE_ALREADY_EXISTS (20220331/dsfield-637)
Jan 27 14:24:08 kernel: ACPI Warning: NsLookup: Type mismatch on CDAT (Integer), searching for (RegionField) (20220331/nsaccess-696)
Jan 27 14:24:08 kernel: ACPI: 9 ACPI AML tables successfully acquired and loaded
Jan 27 14:24:08 kernel: ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
I don't know if this error is related to the problem with the touchpad, but it seems to me that it is.
The kernel module responsible for the touchpad should be elan_i2c. Using modinfo elan_i2c, the following appears:
Code:
sudo modinfo elan_i2c
filename: /lib/modules/6.1.0-2-amd64/kernel/drivers/input/mouse/elan_i2c.ko
license: GPL
description: Elan I2C/SMBus Touchpad driver
author: Duson Lin <dusonlin@emc.com.tw>
alias: i2c:elan_i2c
alias: acpi*:ELAN1000:*
alias: acpi*:ELAN0637:*
alias: acpi*:ELAN0636:*
alias: acpi*:ELAN0635:*
alias: acpi*:ELAN0634:*
alias: acpi*:ELAN0633:*
alias: acpi*:ELAN0632:*
alias: acpi*:ELAN0631:*
alias: acpi*:ELAN062F:*
alias: acpi*:ELAN062E:*
alias: acpi*:ELAN062D:*
alias: acpi*:ELAN062C:*
alias: acpi*:ELAN062B:*
alias: acpi*:ELAN062A:*
alias: acpi*:ELAN0629:*
alias: acpi*:ELAN0628:*
alias: acpi*:ELAN0627:*
alias: acpi*:ELAN0626:*
alias: acpi*:ELAN0625:*
alias: acpi*:ELAN0624:*
alias: acpi*:ELAN0623:*
alias: acpi*:ELAN0622:*
alias: acpi*:ELAN0621:*
alias: acpi*:ELAN0620:*
alias: acpi*:ELAN061F:*
alias: acpi*:ELAN061E:*
alias: acpi*:ELAN061D:*
alias: acpi*:ELAN061C:*
alias: acpi*:ELAN061A:*
alias: acpi*:ELAN0619:*
alias: acpi*:ELAN0618:*
alias: acpi*:ELAN0617:*
alias: acpi*:ELAN0616:*
alias: acpi*:ELAN0615:*
alias: acpi*:ELAN0612:*
alias: acpi*:ELAN0611:*
alias: acpi*:ELAN0610:*
alias: acpi*:ELAN060F:*
alias: acpi*:ELAN060C:*
alias: acpi*:ELAN060B:*
alias: acpi*:ELAN0609:*
alias: acpi*:ELAN0608:*
alias: acpi*:ELAN0607:*
alias: acpi*:ELAN0606:*
alias: acpi*:ELAN0605:*
alias: acpi*:ELAN0604:*
alias: acpi*:ELAN0603:*
alias: acpi*:ELAN0602:*
alias: acpi*:ELAN0601:*
alias: acpi*:ELAN0600:*
alias: acpi*:ELAN0100:*
alias: acpi*:ELAN0000:*
depends:
retpoline: Y
intree: Y
name: elan_i2c
vermagic: 6.1.0-2-amd64 SMP preempt mod_unload modversions
sig_id: PKCS#7
signer: Debian Secure Boot CA
I noticed that the touchpad hid is not listed in the module. I then downloaded kernel 6.1.8, edited /linux-6.1.8/include/linux/input/elan-i2c-ids.h, which lists the devices, inserting hid ELAN0642, and compiled.
The touchpad didn't work, but the acpi error message changed to ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-95).
Building on what has been done
here and
here, I've disassembled the acpi table to look for mentions of the touchpad. I found the following entry:
Code:
Name (CDAT, 0x00)
Scope (_SB.I2CD)
{
Device (TPD0)
{
Name (_HID, "ELAN0642") // _HID: Hardware ID
Name (_CID, "PNP0C50" /* HID Protocol Device (I2C bus) */) // _CID: Compatible ID
ICMS = 0x0A
DCMS = 0x01
ICMS = 0x20
CDAT = DCMS /* \DCMS */
If ((CDAT == 0x02))
{
_HID = "SYNA2392"
}
If ((CDAT == 0x01))
{
_HID = "ELAN0642"
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
If ((CDAT == 0x00))
{
Return (0x00)
}
Else
{
Return (0x0F)
}
}
Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
{
If ((Arg0 == ToUUID ("3cdff6f7-4267-4555-ad05-b30a3d8938de") /* HID I2C Device */))
{
Switch (ToInteger (Arg2))
{
Case (0x00)
{
Switch (ToInteger (Arg1))
{
Case (0x01)
{
Return (Buffer (0x01)
{
0x03 // .
})
}
Default
{
Return (Buffer (0x01)
{
0x00 // .
})
}
}
}
Case (0x01)
{
If ((^^^PCI0.LPC0.H_EC.ECRD (RefOf (^^^PCI0.LPC0.H_EC.TPTY)) == 0x01))
{
Return (0x01)
}
If ((^^^PCI0.LPC0.H_EC.ECRD (RefOf (^^^PCI0.LPC0.H_EC.TPTY)) == 0x02))
{
Return (0x20)
}
}
Default
{
Return (0x00)
}
}
}
Else
{
Return (Buffer (0x01)
{
0x00 // .
})
}
}
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (SBFG, ResourceTemplate ()
{
GpioInt (Level, ActiveLow, ExclusiveAndWake, PullUp, 0x0000,
"\\_SB.GPIO", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0009
}
})
If ((^^^PCI0.LPC0.H_EC.ECRD (RefOf (^^^PCI0.LPC0.H_EC.TPTY)) == 0x01))
{
Name (SBFB, ResourceTemplate ()
{
I2cSerialBusV2 (0x0015, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.I2CD",
0x00, ResourceConsumer, , Exclusive,
)
})
Return (ConcatenateResTemplate (SBFB, SBFG))
}
If ((^^^PCI0.LPC0.H_EC.ECRD (RefOf (^^^PCI0.LPC0.H_EC.TPTY)) == 0x02))
{
Name (SBFC, ResourceTemplate ()
{
I2cSerialBusV2 (0x002C, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.I2CD",
0x00, ResourceConsumer, , Exclusive,
)
})
Return (ConcatenateResTemplate (SBFC, SBFG))
}
}
}
}
At this point, I'm not sure what to do anymore. I saw that some people have written dkms packages to enable elan touchpads as can be seen
here.
Any ideas?
