Lenovo ThinkPad P52

As of 2018-09-30 this is a WIP page inspired by ^[1]. Feel free to chat with me (zougloub on freenode) if you're figuring stuff out or have questions.

Hardware

Overview

root #lscpu

Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              12
On-line CPU(s) list: 0-11
Thread(s) per core:  2
Core(s) per socket:  6
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               158
Model name:          Intel(R) Xeon(R) E-2176M  CPU @ 2.70GHz
Stepping:            10
CPU MHz:             800.023
CPU max MHz:         4400.0000
CPU min MHz:         800.0000
BogoMIPS:            5424.00
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            12288K
NUMA node0 CPU(s):   0-11
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp flush_l1d

root #lspci -nnk

00:00.0 Host bridge [0600]: Intel Corporation Device [8086:3ec4] (rev 07)
        Subsystem: Lenovo Device [17aa:225f]
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 07)
        Kernel driver in use: pcieport
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:3e94]
        Subsystem: Lenovo Device [17aa:225f]
        Kernel driver in use: i915
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] (rev 07)
        Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [17aa:225f]
00:08.0 System peripheral [0880]: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model [8086:1911]
        Subsystem: Lenovo Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model [17aa:225f]
00:12.0 Signal processing controller [1180]: Intel Corporation Device [8086:a379] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:14.0 USB controller [0c03]: Intel Corporation Device [8086:a36d] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci
00:14.2 RAM memory [0500]: Intel Corporation Device [8086:a36f] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:14.3 Network controller [0280]: Intel Corporation Device [8086:a370] (rev 10)
        Subsystem: Intel Corporation Device [8086:0030]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi
00:15.0 Serial bus controller [0c80]: Intel Corporation Device [8086:a368] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:16.0 Communication controller [0780]: Intel Corporation Device [8086:a360] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:16.3 Serial controller [0700]: Intel Corporation Device [8086:a363] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
        Kernel driver in use: serial
00:17.0 SATA controller [0106]: Intel Corporation Device [8086:a353] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
        Kernel driver in use: ahci
00:1c.0 PCI bridge [0604]: Intel Corporation Device [8086:a338] (rev f0)
        Kernel driver in use: pcieport
00:1c.7 PCI bridge [0604]: Intel Corporation Device [8086:a33f] (rev f0)
        Kernel driver in use: pcieport
00:1d.0 PCI bridge [0604]: Intel Corporation Device [8086:a330] (rev f0)
        Kernel driver in use: pcieport
00:1e.0 Communication controller [0780]: Intel Corporation Device [8086:a328] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:a30e] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:1f.3 Audio device [0403]: Intel Corporation Device [8086:a348] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation Device [8086:a323] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
        Kernel driver in use: i801_smbus
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device [8086:a324] (rev 10)
        Subsystem: Lenovo Device [17aa:225f]
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (7) I219-LM [8086:15bb] (rev 10)
        Subsystem: Lenovo Ethernet Connection (7) I219-LM [17aa:225f]
        Kernel driver in use: e1000e
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:1cba] (rev ff)
        Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
01:00.1 Audio device [0403]: NVIDIA Corporation GP107GL High Definition Audio Controller [10de:0fb9] (rev ff)
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
70:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
        Subsystem: Lenovo RTS525A PCI Express Card Reader [17aa:225f]
        Kernel driver in use: rtsx_pci
        Kernel modules: rtsx_pci
71:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a802] (rev 01)
        Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a801]
        Kernel driver in use: nvme

root #lsusb -t

/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 10000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/16p, 480M
    |__ Port 8: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M
    |__ Port 8: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 9: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
    |__ Port 10: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 10: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 12: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
    |__ Port 12: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 14: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 14: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M

root #lsusb

Bus 001 Device 002: ID 04f2:b614 Chicony Electronics Co., Ltd 
Bus 001 Device 004: ID 056a:5191 Wacom Co., Ltd 
Bus 001 Device 005: ID 04f2:b615 Chicony Electronics Co., Ltd 
Bus 001 Device 006: ID 8087:0aaa Intel Corp. 
Bus 001 Device 003: ID 06cb:009a Synaptics, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Peculiarities

Touchpad isn't working out of the box (as of 2018-09-30)
Hybrid graphics are not a breeze to use

Power management

This section deals with:

Tips for reducing power consumption
Suspend/resume

TODO see Lenovo_ThinkPad_P50

Graphics

The laptop has an integrated Intel GPU (iGPU) and a second nVidia GPU (dGPU).

External displays are routed through the dGPU, and the laptop screen is connected to the iGPU.

The knobs to configure the displays are:

The BIOS: it can either enable hybrid graphics or only the dGPU
The bbswitch module (part of Bumblebee) can enable/disable the dGPU in a hybrid graphics configuration
Bumblebee can route OpenGL / OpenCL calls to the dGPU
The PRIME "thing" handles display routing through one or the other GPU
Using the nouveau or nvidia proprietary drivers

Obviously:

If external displays are to be used, the dGPU must be on
The iGPU takes less power (see Power Management)
The ideal configuration is hybrid graphics, with all display connectors available, and rendering mainly done using the iGPU, with the dGPU helping out for graphics-intensive loads. Unfortunately as of 2018-09-30, the problem when trying this configuration is that the OpenGL acceleration isn't available on the iGPU.

Notable configurations that work:

BIOS in discrete graphics with nVidia-only display (that's the easiest way)
BIOS in hybrid graphics with Intel-only display and Bumblebee, no external displays (everything is good except for no external displays)

FN keys

Thunderbolt

TODO test

As the thunderbolt controller is just PCIe, you don't need to do anything at all. Have PCI express hotplugging enabled in your kernel. When you insert a thunderbolt device, the BIOS will enumerate it, and simply hotplug a PCIe device, just like express port.

Similarly, if you use the port for USB 3.1 via the USB-C connector, a new XHCI controller will be hotplugged, which will have your USB device connected to it, at USB 3.1 gen 2 speeds.

Input (Trackpoint, Touchpad, Touchscreen)

root #lsinput

    0: 0000:0003 HOST   PNP0C0E/button/i Sleep Button             KEY
    1: 0000:0005 HOST   PNP0C0D/button/i Lid Switch               SW
    2: 0000:0001 HOST   LNXPWRBN/button/ Power Button             KEY
    3: 0000:0006 HOST   LNXVIDEO/video/i Video Bus                KEY
    4: 0000:0006 HOST   LNXVIDEO/video/i Video Bus                KEY
    5: 0001:0002 I8042  isa0060/serio0/i AT Raw Set 2 keyboard    KEY MSC LED
    6: 001f:0001 ISA    isa0061/input0   PC Speaker               SND
    7: 17aa:5054 HOST   thinkpad_acpi/in ThinkPad Extra Buttons   KEY MSC SW
    8: 10ec:0285 PCI    card0/codec#0/be HDA Digital PCBeep       SND
    9: 0000:0000 (null) ALSA             HDA Intel PCH Mic        SW
   10: 0000:0000 (null) ALSA             HDA Intel PCH Headphone  SW
   11: 0000:0000 (null) ALSA             HDA Intel PCH HDMI/DP,pc SW
   12: 0000:0000 (null) ALSA             HDA Intel PCH HDMI/DP,pc SW
   13: 0000:0000 (null) ALSA             HDA Intel PCH HDMI/DP,pc SW
   14: 0000:0000 (null) ALSA             HDA Intel PCH HDMI/DP,pc SW
   15: 0000:0000 (null) ALSA             HDA Intel PCH HDMI/DP,pc SW
   16: 0000:0000 (null) ALSA             HDA NVidia HDMI/DP,pcm=3 SW
   17: 0000:0000 (null) ALSA             HDA NVidia HDMI/DP,pcm=7 SW
   18: 0000:0000 (null) ALSA             HDA NVidia HDMI/DP,pcm=8 SW
   19: 0000:0000 (null) ALSA             HDA NVidia HDMI/DP,pcm=9 SW
   20: 0002:000e I8042  isa0060/serio1/i ETPS/2 Elantech TrackPoi KEY REL
   21: 0002:000e I8042  isa0060/serio1/i ETPS/2 Elantech Touchpad KEY ABS
   22: 056a:5191 USB    usb-0000:00:14.0 Wacom Co.,Ltd. Pen and m KEY ABS MSC
   23: 056a:5191 USB    usb-0000:00:14.0 Wacom Co.,Ltd. Pen and m ABS
   24: 056a:5191 USB    usb-0000:00:14.0 Wacom Co.,Ltd. Pen and m KEY ABS MSC
   25: 056a:5191 USB    usb-0000:00:14.0 Wacom Co.,Ltd. Pen and m KEY ABS MSC
   26: 056a:5191 USB    usb-0000:00:14.0 Wacom Co.,Ltd. Pen and m KEY ABS MSC
   27: 04f2:b614 USB    usb-0000:00:14.0 Integrated Camera: Integ KEY
   28: 04f2:b615 USB    usb-0000:00:14.0 Integrated IR Camera: In KEY

Touchpad

In order to have the trackpoint/touchpad work:

ensure the psmouse module has been built with elantech options
add elantech_smbus=0 to psmouse configuration (either by kernel command-line or modprobe.d configuration file)

Touchscreen

In order to have the touchscreen work:

multitouch is handled by the wacom kernel module
multitouch at the X/wayland level is handled by the libinput X module (*not* wacom!).

Notes:

mtdev-test will show a non-empty list of event if the touchscreen is configured properly:

root #mtdev-test /dev/input/event22

supported mt events:
   ABS_MT_SLOT
   ABS_MT_POSITION_X
   ABS_MT_POSITION_Y
   ABS_MT_TRACKING_ID

libinput debug-events will show finger ids when configured properly:

root #libinput debug-events

...
      event22  TOUCH_DOWN       +18.97s      0 (0) 75.90/58.04 (261.25/112.38mm)
      event22  TOUCH_FRAME      +18.97s
      event22  TOUCH_UP         +19.27s
      event22  TOUCH_FRAME      +19.27s
      event22  TOUCH_DOWN       +19.61s      1 (1) 88.99/48.35 (306.32/93.62mm)
      event22  TOUCH_FRAME      +19.61s
      event22  TOUCH_DOWN       +20.05s      2 (2) 95.49/55.60 (328.70/107.65mm)
      event22  TOUCH_FRAME      +20.05s
...

x11-libs/gtk+:3[examples]'s gtk3-demo has a multitouch test window that can be useful to visually check that everything is OK within GTK (there aren't so many multitouch-enabled apps out there)

↑ Lenovo_ThinkPad_P50

[P50-1] Lenovo_ThinkPad_P50

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