Hi, in ec667683c532c93fb41e100e5d61a518971060e2, the ThinkPad X1 Carbon Gen5’s trackpoint was made recognized as a trackpoint instead of a generic PS/2 mouse. However, starting with this commit, my trackpoint is *way* too sensitive. Changing the sensitivity in /sys/devices/platform/i8042/serio1/serio2 did have an effect on my pointer, but changing the speed (to any, even the same) value results in: [ 229.845014] psmouse serio2: Failed to enable mouse on synaptics-pt/serio0 I can reproduce this with: # cat /sys/devices/platform/i8042/serio1/serio2/speed 97 # echo 97 > /sys/devices/platform/i8042/serio1/serio2/speed [a noticeable delay] # Afterwards, the pointer jumps around briefly and one or two clicks are generated. Furthermore, actually clicking with the left trackpoint button (the one below the space bar) generated some other input event that let rxvt-unicode send a SIGINT to the running process. I can provide more details on that behaviour if it helps. dmesg: | [ 0.000000] Linux version 4.15.0-rc5 (yath@marax) (gcc version 7.2.0 (Debian 7.2.0-18)) #2 SMP Sun Dec 24 18:08:06 CET 2017 | […] | [ 0.900182] serio: i8042 KBD port at 0x60,0x64 irq 1 | [ 0.900199] serio: i8042 AUX port at 0x60,0x64 irq 12 | [ 0.900521] mousedev: PS/2 mouse device common for all mice | [ 0.902025] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0 | […] | [ 1.920218] psmouse serio1: synaptics: queried max coordinates: x [..5676], y [..4760] | [ 1.952234] psmouse serio1: synaptics: queried min coordinates: x [1266..], y [1094..] | [ 1.952242] psmouse serio1: synaptics: The touchpad can support a better bus than the too old PS/2 protocol. Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience. | [ 2.015302] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.2, id: 0x1e2b1, caps: 0xf002a3/0x940300/0x12e800/0x400000, board id: 3289, fw id: 2492434 | [ 2.015315] psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0 | [ 2.055296] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input2 | [ 2.342490] psmouse serio2: trackpoint: failed to get extended button data, assuming 3 buttons | […] | [ 5.836251] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x04, buttons: 3/3 | [ 6.038877] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input3 Regarding the “use better bus than PS/2” message, the .config is based on Debian’s config-4.14.0-1-amd64 (yes ""|make oldconfig) and therefore pretty generic. % grep -E 'MOUSE_PS2_SYNAPTICS_SMBUS|RMI4_SMB' /boot/config-4.15.0-rc5 CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS=y # CONFIG_RMI4_SMB is not set % The message only talks about Touchpads and not Trackpoints, so I’m not sure whether this is an issue. I should also point out that I’m keeping the Touchpad disabled with ‘xinput disable "SynPS/2 Synaptics TouchPad"’ in my ~/.Xsession. dmidecode: | Handle 0x000B, DMI type 0, 24 bytes | BIOS Information | Vendor: LENOVO | Version: N1MET39W (1.24 ) | Release Date: 09/27/2017 | Address: 0xE0000 | Runtime Size: 128 kB | ROM Size: 16 MB | […] | Handle 0x000C, DMI type 1, 27 bytes | System Information | Manufacturer: LENOVO | Product Name: 20HRCTO1WW | Version: ThinkPad X1 Carbon 5th | Serial Number: [stripped] | UUID: [stripped] | Wake-up Type: Power Switch | SKU Number: LENOVO_MT_20HR_BU_Think_FM_ThinkPad X1 Carbon 5th | Family: ThinkPad X1 Carbon 5th | | Handle 0x000D, DMI type 2, 15 bytes | Base Board Information | Manufacturer: LENOVO | Product Name: 20HRCTO1WW | Version: SDK0J40697 WIN | Serial Number: L1HF71L0014 | Asset Tag: Not Available | Features: | Board is a hosting board | Board is replaceable | Location In Chassis: Not Available | Chassis Handle: 0x0000 | | Handle 0x000E, DMI type 3, 22 bytes | Chassis Information | Manufacturer: LENOVO | Type: Notebook | Lock: Not Present | Version: None | Serial Number: [stripped] | Asset Tag: No Asset Information | Boot-up State: Unknown | Power Supply State: Unknown | Thermal State: Unknown | Security Status: Unknown | OEM Information: 0x00000000 | Height: Unspecified | Number Of Power Cords: Unspecified | Contained Elements: 0 | SKU Number: Not Specified | […] | Handle 0x0031, DMI type 21, 7 bytes | Built-in Pointing Device | Type: Track Point | Interface: PS/2 | Buttons: 3 | | Handle 0x0032, DMI type 21, 7 bytes | Built-in Pointing Device | Type: Touch Pad | Interface: PS/2 | Buttons: 2 | I couldn’t find any debugging knobs in input/trackpoint.c, but let me know if I can provide additional information. Thanks! Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
