Dear kernel input developers, While trying out 3.18-rc2, I noticed that the Elantech touchpad on my laptop didn't work as intended anymore. Mouse movement and tapping one finger worked, but scrolling and two finger tapping did not. X.org also didn't recognise the touchpad as a synaptics touchpad anymore. After googling around I found that i8042.nomux=0 brought it back to normal. My laptop is a Clevo model W650SH with a keyboard and a touchpad attached, and no touchschreen. Some output of dmesg is listed at the bottom, and the result of dmidecode is attached. Best regards, Roel Aaij Some dmesg output without i8042.nomux=0 (not fully functional touchpad) [ 1.221297] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:ELNM] at 0x60,0x64 irq 1,12 [ 1.226412] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 1.226414] serio: i8042 AUX port at 0x60,0x64 irq 12 [ 1.229415] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input6 [ 5.017142] psmouse serio1: elantech: assuming hardware version 3 (with firmware version 0x450f02) [ 5.018055] psmouse serio1: elantech: elantech_send_cmd query 0x02 failed. [ 5.018057] psmouse serio1: elantech: failed to query capabilities. [ 5.930158] input: PS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input8 Some dmesg output with i8042.nomux=0 (fully functional touchpad) [ 1.361320] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:ELNM] at 0x60,0x64 irq 1,12 [ 1.366134] i8042: Detected active multiplexing controller, rev 1.1 [ 1.367757] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 1.367759] serio: i8042 AUX0 port at 0x60,0x64 irq 12 [ 1.367764] serio: i8042 AUX1 port at 0x60,0x64 irq 12 [ 1.367765] serio: i8042 AUX2 port at 0x60,0x64 irq 12 [ 1.367766] serio: i8042 AUX3 port at 0x60,0x64 irq 12 [ 1.371243] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input6 [ 99.389964] psmouse serio2: elantech: assuming hardware version 3 (with firmware version 0x450f02) [ 99.489797] psmouse serio2: elantech: Synaptics capabilities query result 0x79, 0x17, 0x0c. [ 99.819119] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio2/input/input22 P.S. The late timestamps in the last few lines are due to a "modprobe -r psmouse && modprobe psmouse"
# dmidecode 2.12 SMBIOS 2.7 present. 34 structures occupying 1874 bytes. Table at 0x000EB500. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: American Megatrends Inc. Version: 1.00.05 Release Date: 08/07/2013 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 4096 kB Characteristics: PCI is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported EDD is supported Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Printer services are supported (int 17h) ACPI is supported USB legacy is supported BIOS boot specification is supported Targeted content distribution is supported UEFI is supported BIOS Revision: 4.6 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Notebook Product Name: W65_W670SH Version: Not Applicable Serial Number: Not Applicable UUID: ECF59000-47ED-0000-0000-000000000000 Wake-up Type: Power Switch SKU Number: Not Applicable Family: Not Applicable Handle 0x0002, DMI type 2, 15 bytes Base Board Information Manufacturer: Notebook Product Name: W65_W670SH Version: Not Applicable Serial Number: Not Applicable Asset Tag: Tag 12345 Features: Board is a hosting board Board is replaceable Location In Chassis: Not Applicable Chassis Handle: 0x0003 Type: Motherboard Contained Object Handles: 0 Handle 0x0003, DMI type 3, 22 bytes Chassis Information Manufacturer: Notebook Type: Laptop Lock: Not Present Version: N/A Serial Number: None Asset Tag: No Asset Tag Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000000 Height: Unspecified Number Of Power Cords: 1 Contained Elements: 0 SKU Number: To be filled by O.E.M. Handle 0x0004, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J1A1 Internal Connector Type: None External Reference Designator: PS2Mouse External Connector Type: PS/2 Port Type: Mouse Port Handle 0x0005, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J1A1 Internal Connector Type: None External Reference Designator: Keyboard External Connector Type: PS/2 Port Type: Keyboard Port Handle 0x0006, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J2A1 Internal Connector Type: None External Reference Designator: TV Out External Connector Type: Mini Centronics Type-14 Port Type: Other Handle 0x0007, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J2A2A Internal Connector Type: None External Reference Designator: COM A External Connector Type: DB-9 male Port Type: Serial Port 16550A Compatible Handle 0x0008, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J2A2B Internal Connector Type: None External Reference Designator: Video External Connector Type: DB-15 female Port Type: Video Port Handle 0x0009, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J3A1 Internal Connector Type: None External Reference Designator: USB1 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x000A, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J3A1 Internal Connector Type: None External Reference Designator: USB2 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x000B, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J3A1 Internal Connector Type: None External Reference Designator: USB3 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x000C, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J5A1 Internal Connector Type: None External Reference Designator: LAN External Connector Type: RJ-45 Port Type: Network Port Handle 0x000D, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J5A1 Internal Connector Type: None External Reference Designator: USB4 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x000E, DMI type 9, 17 bytes System Slot Information Designation: J6B2 Type: x16 PCI Express Current Usage: In Use Length: Long ID: 0 Characteristics: 3.3 V is provided Opening is shared PME signal is supported Bus Address: 0000:00:01.0 Handle 0x000F, DMI type 10, 8 bytes On Board Device 1 Information Type: Video Status: Enabled Description: To Be Filled By O.E.M. On Board Device 2 Information Type: Ethernet Status: Enabled Description: To Be Filled By O.E.M. Handle 0x0010, DMI type 11, 5 bytes OEM Strings String 1: 1558 String 2: OEM String String 3: To Be Filled By O.E.M. String 4: To Be Filled By O.E.M. String 5: BIOS:1.00.05 Handle 0x0011, DMI type 12, 5 bytes System Configuration Options Option 1: To Be Filled By O.E.M. Handle 0x0012, DMI type 24, 5 bytes Hardware Security Power-On Password Status: Disabled Keyboard Password Status: Disabled Administrator Password Status: Disabled Front Panel Reset Status: Disabled Handle 0x0013, DMI type 32, 20 bytes System Boot Information Status: No errors detected Handle 0x0014, DMI type 4, 42 bytes Processor Information Socket Designation: SOCKET 0 Type: Central Processor Family: Core i7 Manufacturer: Intel ID: C3 06 03 00 FF FB EB BF Signature: Type 0, Family 6, Model 60, Stepping 3 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) DS (Debug store) ACPI (ACPI supported) MMX (MMX technology supported) FXSR (FXSAVE and FXSTOR instructions supported) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) SS (Self-snoop) HTT (Multi-threading) TM (Thermal monitor supported) PBE (Pending break enabled) Version: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz Voltage: 1.2 V External Clock: 100 MHz Max Speed: 3800 MHz Current Speed: 2400 MHz Status: Populated, Enabled Upgrade: Socket rPGA988B L1 Cache Handle: 0x0016 L2 Cache Handle: 0x0015 L3 Cache Handle: 0x0017 Serial Number: Not Specified Asset Tag: Fill By OEM Part Number: Fill By OEM Core Count: 4 Core Enabled: 4 Thread Count: 8 Characteristics: 64-bit capable Handle 0x0015, DMI type 7, 19 bytes Cache Information Socket Designation: CPU Internal L2 Configuration: Enabled, Not Socketed, Level 2 Operational Mode: Write Back Location: Internal Installed Size: 1024 kB Maximum Size: 1024 kB Supported SRAM Types: Unknown Installed SRAM Type: Unknown Speed: Unknown Error Correction Type: Single-bit ECC System Type: Unified Associativity: 8-way Set-associative Handle 0x0016, DMI type 7, 19 bytes Cache Information Socket Designation: CPU Internal L1 Configuration: Enabled, Not Socketed, Level 1 Operational Mode: Write Back Location: Internal Installed Size: 256 kB Maximum Size: 256 kB Supported SRAM Types: Unknown Installed SRAM Type: Unknown Speed: Unknown Error Correction Type: Single-bit ECC System Type: Other Associativity: 8-way Set-associative Handle 0x0017, DMI type 7, 19 bytes Cache Information Socket Designation: CPU Internal L3 Configuration: Enabled, Not Socketed, Level 3 Operational Mode: Write Back Location: Internal Installed Size: 6144 kB Maximum Size: 6144 kB Supported SRAM Types: Unknown Installed SRAM Type: Unknown Speed: Unknown Error Correction Type: Single-bit ECC System Type: Unified Associativity: 12-way Set-associative Handle 0x0018, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 32 GB Error Information Handle: Not Provided Number Of Devices: 4 Handle 0x0019, DMI type 17, 34 bytes Memory Device Array Handle: 0x0018 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 8192 MB Form Factor: SODIMM Set: None Locator: ChannelA-DIMM0 Bank Locator: BANK 0 Type: DDR3 Type Detail: Synchronous Speed: 1600 MHz Manufacturer: 1315 Serial Number: 12230000 Asset Tag: 9876543210 Part Number: CT102464BF160B.C16 Rank: 2 Configured Clock Speed: 1600 MHz Handle 0x001A, DMI type 20, 35 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x001FFFFFFFF Range Size: 8 GB Physical Device Handle: 0x0019 Memory Array Mapped Address Handle: 0x001E Partition Row Position: Unknown Interleave Position: Unknown Interleaved Data Depth: Unknown Handle 0x001B, DMI type 17, 34 bytes Memory Device Array Handle: 0x0018 Error Information Handle: Not Provided Total Width: Unknown Data Width: Unknown Size: No Module Installed Form Factor: DIMM Set: None Locator: ChannelA-DIMM1 Bank Locator: BANK 1 Type: Unknown Type Detail: None Speed: Unknown Manufacturer: [Empty] Serial Number: [Empty] Asset Tag: 9876543210 Part Number: [Empty] Rank: Unknown Configured Clock Speed: Unknown Handle 0x001C, DMI type 17, 34 bytes Memory Device Array Handle: 0x0018 Error Information Handle: Not Provided Total Width: Unknown Data Width: Unknown Size: No Module Installed Form Factor: DIMM Set: None Locator: ChannelB-DIMM0 Bank Locator: BANK 2 Type: Unknown Type Detail: None Speed: Unknown Manufacturer: [Empty] Serial Number: [Empty] Asset Tag: 9876543210 Part Number: [Empty] Rank: Unknown Configured Clock Speed: Unknown Handle 0x001D, DMI type 17, 34 bytes Memory Device Array Handle: 0x0018 Error Information Handle: Not Provided Total Width: Unknown Data Width: Unknown Size: No Module Installed Form Factor: DIMM Set: None Locator: ChannelB-DIMM1 Bank Locator: BANK 3 Type: Unknown Type Detail: None Speed: Unknown Manufacturer: [Empty] Serial Number: [Empty] Asset Tag: 9876543210 Part Number: [Empty] Rank: Unknown Configured Clock Speed: Unknown Handle 0x001E, DMI type 19, 31 bytes Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x001FFFFFFFF Range Size: 8 GB Physical Array Handle: 0x0018 Partition Width: 4 Handle 0x0022, DMI type 131, 64 bytes OEM-specific Type Header and Data: 83 40 22 00 31 00 00 00 00 00 00 00 00 00 00 00 F8 00 49 8C 00 00 00 00 01 20 00 00 00 00 09 00 7A 05 0D 00 00 00 00 00 C8 00 FF FF 00 00 00 00 00 00 00 00 66 00 00 00 76 50 72 6F 00 00 00 00 Handle 0x0023, DMI type 13, 22 bytes BIOS Language Information Language Description Format: Long Installable Languages: 1 en|US|iso8859-1 Currently Installed Language: en|US|iso8859-1 Handle 0x0025, DMI type 127, 4 bytes End Of Table
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