Lenovo ThinkPad P52

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As of 2018-09-30 this is a WIP page inspired by Lenovo ThinkPad P50. 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

  • (EDIT): The system doesn't boot from the Gentoo Install or Gentoo Admin USB Key (converted from ISO as there's not optical drive included). In order to get this working you need to boot from another distribution
  • The system boots with Hybrid Graphics Mode, but doesn't work correctly. You can't run startx or run lspci. it will cause the system to hang when using SystemRescueCD (tested version 6.0.2). To solve this you need to edit the grub configuration before booting and append the following 2 items: acpi_osi=! acpi_osi="Windows 2009" and press F10 to boot. After Hybrid Graphics mode boots fine. The same happens with Ubuntu 18.10. The USB Key boots, it shows the graphical desktop. You can move the mouse around, but you can't click anything and nothing else responds. It's solved with the acpi_osi kernel parameters.
  • After installing Gentoo with a recent kernel it's safe to use acpi_osi=! acpi_osi="Linux". This works without a problem.
  • (EDIT): startx doesnt't work when booting as described below. As a temporary solution is to run rmmod nouveau and create an /etc/X11/xorg.conf on the USB key and specify the Intel lines described in the corresponding section below. After xorg will start just fine.
  • (EDIT): Touchpad works fine with the 4.19.* gentoo-sources kernel after compiling in ELAN support as PS/2 and I2C driver and the IBM TrackPoint driver. It's registered as a serio device and after installing and activating gpm I can report that the mouse is working and even scroll functionality of the middle mouse button works
  • Hybrid graphics are not a breeze to use
  • (EDIT): Make sure to run at least UEFI / BIOS version 1.18 due to a corruption bug when switching from Dedicated to Hybrid Graphics mode

Power management

This section deals with:

  • Tips for reducing power consumption
  • Suspend/resume

TODO see Lenovo_ThinkPad_P50

Kernel

To get everything working properly including power management and Low Power Subsystems support, make sure the following items are included in the .config file

It will be useful to manual apply the patch from kernel 5.8 for dual fan control

Note
Tested on kernel version 5.3.12 and 5.7.10
root #cd /usr/src/linux
root #curl "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=14232c6e788cb1f7b96dbd08b077f90923324b24" > dualfan.patch
root #patch -p1 < dualfan.patch

TODO

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.

There's several ways to configure the display(s).

  • 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 uses 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 and when external displays are to be used.

Notable configurations that work:

  1. BIOS in discrete graphics with NVIDIA-only display (that's the easiest way)
  2. BIOS in hybrid graphics with Intel-only display and Bumblebee, no external displays (everything is good except for no external displays)
  3. BIOS in hybrid graphics with laptop panel on iGPU and xf86-video-intel (not modesetting) and external displays using eGPU and NVIDIA proprietary drivers, which will be detailed hereafter.

The configuration of bumblebee needs to be adjusted according to usage.


Setup for Hybrid Graphics mode with external displays on the dGPU

  1. Install NVIDIA proprietary drivers
  2. Install x11-misc/bumblebee and sys-power/bbswitch
  3. Edit Bumblebee's xorg.conf.nvidia as follows (important bits are UseEDID and AllowEmptyInitialConfiguration):
    FILE /etc/bumblebee/xorg.conf.nvidia
    Section "ServerLayout"
    Identifier  "Layout0"
    Option      "AutoAddDevices" "false" # prevent plugging udev devices to this server
    Option      "AutoAddGPU" "false" # only nvidia
EndSection

Section "Device"
    Identifier  "DiscreteNvidia"
    Driver      "nvidia"
    VendorName  "NVIDIA Corporation"
    BusID "PCI:01:00:0"
    Option "ProbeAllGpus" "false"
    Option "NoLogo" "true"
    Option "UseEDID" "true" # detect external monitors resolutions
    Option "AllowEmptyInitialConfiguration" # work even if no display
EndSection
  4. Edit Bumblebee's configuration file
    FILE /etc/bumblebee/bumblebee.conf
    KeepUnusedXServer=false
TurnOffCardAtExit=true
  5. Restart the bumblebeed daemon
    1. For systemd users: systemctl enable bumblebeed && systemctl start bumblebeed
    2. For openRC users: rc-update add bumblebeed default && service bumblebeed start

Note: Failure to change the settings above, will cause the keyboard to stop responding when exiting X or restarting the bumblebeed daemon.

  1. Add an xorg.conf.d snippet as follows (to use the intel driver, which offers intel-virtual-output):
    FILE /etc/X11/xorg.conf.d/intel.conf
    Section "Device"
    Identifier     "intel"
    Driver         "intel"
    Option         "TearFree"    "true" # not relevant here but useful
EndSection

Setup for Hybrid Graphics mode without external displays on the dGPU and only using the dGPU for your eDP display

  1. Set /etc/bumblebee/bumblebee.conf to have PMMethod=none and KeepUnusedXServer=true, which allows to keep the display active after running a dummy optirun true

Usage

  1. Run optirun true to start the Bumblebee X server if you want to start display output on your local screen
  2. Run intel-virtual-output to plug the NVIDIA hardware outputs as virtual outputs on the current X screen
  3. At this point the plugged external monitors will become available in XRandR, as virtual devices, e.g.
user $xrandr
[...]
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
VIRTUAL2 disconnected (normal left inverted right x axis y axis)
VIRTUAL3 disconnected (normal left inverted right x axis y axis)
VIRTUAL4 disconnected (normal left inverted right x axis y axis)
VIRTUAL5 connected 2560x1440+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm
   2560x1440     59.95*
[...]

FN keys

Thunderbolt

Use tbtadm (sys-apps/thunderbolt-software-user-space) or boltctl (sys-apps/bolt).

DisplayPort outputs are simply routed graphics, i.e. their working depends on the GPU configuration...

SD card reader

Handled by the rtsx_pci_sdmmc kernel module.

Smart Card Reader

Some versions of the Lenovo ThinkPad P52 contain a Alcor AU based series USB Smart Card reader. Follow the PCSC Lite guide to get this working. The driver needed is: app-crypt/ccid.

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
  • Pass elantech_smbus=0 to the psmouse kernel module (either by kernel command-line or modprobe.d configuration file)

Touchscreen

In order to have the touchscreen work:

  • Multi-touch is handled by the wacom kernel module
  • Multi-touch 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 multi-touch test window that can be useful to visually check that everything is OK within GTK (there aren't so many multi-touch enabled apps out there).

External resources

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