Lenovo Thinkpad T480

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Lenovo Thinkpad T480 is a business notebook based on 7th/8th generation Intel® Core™ processor.

Hardware

Standard

Device Make/model Status Vendor ID / Product ID Kernel driver(s) Kernel version Notes
CPU Intel i5-7200U, i5-7300U, i3-8130U, i5-8250U, i5-8350U, i7-8550U, or i7-8650U Works N/A N/A 6.6.6
RAM max 32GiB DDR4 2400MHz (2 SO-DIMM) Works N/A N/A 6.6.6
GPU integrated Intel HD/UHD Graphics 620 Works N/A intel 6.6.6
Discrete GPU (optional) NVIDIA GeForce MX150, 2GB GDDR5 memory Not tested N/A N/A N/A
Display 14.0"; 16:9; HD 1366x768 TN 220 nits, FHD 1920 x 1080 IPS 250 nits, or WQHD 2560x1440 IPS 300 nits Works N/A N/A 6.6.6 multitouch option for FHD
Storage M.2 PCIe-NVMe, 512GB/1TB Works N/A nvme 6.6.6 Sandisk Corp WD Black 2018/SN750 / PC SN720 NVMe SSD
Ethernet Intel Ethernet Connection I219-V Works N/A e1000e 6.6.6 Intel Corporation Ethernet Connection (4) I219-V (rev 21)
Wi-Fi Intel Dual Band Wireless-AC 8265, Wi-Fi 2x2 802.11ac Works N/A iwlwifi 6.6.6 Intel Corporation Dual Band Wireless-AC 8265 [Windstorm Peak]
Bluetooth Intel Bluetooth 4.1 Not tested 8087:0a2b btusb 6.6.6
Mobile Broadband Intel XMM 7262 (Fibocom L830-EB) or Intel XMM 7360 (Fibocom L850-GL) Not tested N/A N/A N/A
Sound HD Audio, Realtek ALC3287 codec Works N/A snd_hda_intel 6.6.6
Webcam IMC Networks Integrated Camera Not tested 13d3:56a6 uvcvideo 6.6.6 HD720p
Keyboard Backlit Works N/A N/A 6.6.6
Touchpad Synaptics TM3276-022 Works N/A libinput 6.6.6
Fingerprint Reader Synaptics, Inc. Metallica MIS Touch Fingerprint Reader Not tested 06cb:009a N/A N/A
Smartcard Reader Alcor Micro Corp. AU9540 Smartcard Reader Not tested 058f:9540 sdhci-pci 6.6.6
SD Card Reader Realtek Semiconductor Corp. Card Reader Works 0bda:0316 usb-storage 6.6.6

CPU and its features:

root #lscpu
Architecture:                       x86_64
CPU op-mode(s):                     32-bit, 64-bit
Address sizes:                      39 bits physical, 48 bits virtual
Byte Order:                         Little Endian
CPU(s):                             8
On-line CPU(s) list:                0-7
Vendor ID:                          GenuineIntel
Model name:                         Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
CPU family:                         6
Model:                              142
Thread(s) per core:                 2
Core(s) per socket:                 4
Socket(s):                          1
Stepping:                           10
CPU(s) scaling MHz:                 20%
CPU max MHz:                        4000.0000
CPU min MHz:                        400.0000
BogoMIPS:                           3999.93
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 pni pclmulqdq dtes64 monitor ds_cpl vmx 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 pti ssbd ibrs ibpb stibp tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp vnmi md_clear flush_l1d arch_capabilities

List of PCI devices:

root #lspci -k
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: skl_uncore
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
	Subsystem: Lenovo UHD Graphics 620
	Kernel driver in use: i915
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 08)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: proc_thermal
	Kernel modules: processor_thermal_device_pci_legacy
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
	Subsystem: Lenovo ThinkPad T480
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: intel_pch_thermal
	Kernel modules: intel_pch_thermal
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
	Subsystem: Lenovo ThinkPad T480
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
	Subsystem: Lenovo ThinkPad T480
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
	Subsystem: Lenovo Sunrise Point-LP PCI Express Root Port
	Kernel driver in use: pcieport
00:1c.6 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #7 (rev f1)
	Subsystem: Lenovo Sunrise Point-LP PCI Express Root Port
	Kernel driver in use: pcieport
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
	Subsystem: Lenovo Sunrise Point-LP PCI Express Root Port
	Kernel driver in use: pcieport
00:1d.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #11 (rev f1)
	Subsystem: Lenovo Sunrise Point-LP PCI Express Root Port
	Kernel driver in use: pcieport
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC/eSPI Controller (rev 21)
	Subsystem: Lenovo ThinkPad T480
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
	Subsystem: Lenovo ThinkPad T480
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: snd_hda_intel
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: i801_smbus
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V (rev 21)
	Subsystem: Lenovo ThinkPad T480
	Kernel driver in use: e1000e
03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
	Subsystem: Intel Corporation Dual Band Wireless-AC 8265 [Windstorm Peak]
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi
04:00.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low Power) [Alpine Ridge LP 2016] (rev 01)
	Subsystem: Device 2222:1111
	Kernel driver in use: pcieport
05:00.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low Power) [Alpine Ridge LP 2016] (rev 01)
	Subsystem: Device 2222:1111
	Kernel driver in use: pcieport
05:01.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low Power) [Alpine Ridge LP 2016] (rev 01)
	Subsystem: Device 2222:1111
	Kernel driver in use: pcieport
05:02.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low Power) [Alpine Ridge LP 2016] (rev 01)
	Subsystem: Device 2222:1111
	Kernel driver in use: pcieport
06:00.0 System peripheral: Intel Corporation JHL6240 Thunderbolt 3 NHI (Low Power) [Alpine Ridge LP 2016] (rev 01)
	Subsystem: Device 2222:1111
3c:00.0 USB controller: Intel Corporation JHL6240 Thunderbolt 3 USB 3.1 Controller (Low Power) [Alpine Ridge LP 2016] (rev 01)
	Subsystem: Device 2222:1111
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci
3d:00.0 Non-Volatile memory controller: Sandisk Corp SanDisk Extreme Pro / WD Black 2018/SN750/PC SN720 NVMe SSD
	Subsystem: Sandisk Corp WD Black 2018/SN750 / PC SN720 NVMe SSD
	Kernel driver in use: nvme

List of USB devices:

root #lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. Card Reader
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 06cb:009a Synaptics, Inc. Metallica MIS Touch Fingerprint Reader
Bus 001 Device 004: ID 13d3:56a6 IMC Networks Integrated Camera
Bus 001 Device 003: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 002: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

List the state of both batteries:

root #upower -i /org/freedesktop/UPower/devices/battery_BAT0
root #upower -i /org/freedesktop/UPower/devices/battery_BAT1

Installation

Firmware

Intel microcode:

root #emerge --ask sys-firmware/intel-microcode

In order for the SoC and wireless to work properly, it is necessary to install the proper firmware files:

root #emerge --ask sys-kernel/linux-firmware
Tip
See intel and iwlwifi articles for more information.

Kernel

Processor

KERNEL Kernel 6.6.6 (gentoo-sources)
Processor type and features  --->
      Processor family (Core 2/newer Xeon)
      Supported processsor vendors  --->
        [*] Support Intel processors            

Power management and ACPI options  --->
      CPU Frequency scaling  --->
             Default CPUFreq governor (performance)
        <*>  'performance' governor
        *** CPU frequency scaling drivers ***
        -*- Intel P state control

Device Drivers  --->
  [*] IOMMU Hardware Support  --->
       [*] Support for Intel IOMMU using DMA Remapping Devices
          [*]     Enable Intel DMA Remapping Devices by default
          [*]     Intel IOMMU performance events
       [*] Support for Interrupt Remapping

Using sys-kernel/gentoo-sources with the experimental USE flag will have additional Processor family options made available:

KERNEL Kernel 6.6.6 (gentoo-sources)
Processor type and features  --->
  Processor family  --->
    ...

or simply autodetecting the processor options by the compiler:

KERNEL Kernel 6.6.6 (gentoo-sources)
Processor type and features  --->
  Processor family  --->
    (X) Native optimizations autodetected by GCC

Drivers

KERNEL Kernel 6.6.6 (gentoo-sources)
Power management and ACPI options  --->
  [*] ACPI (Advanced Configuration and Power Interface) Support  --->
        <*>  Battery
        <*>  Video
        {*}  Fan

Networking support  --->
  <M> Bluetooth subsystem support  --->
      Bluetooth device drivers  --->
        <M> HCI USB driver

  <*> Wireless  --->
    <M>  cfg80211 - wireless configuration API
    [*]  enable powersave by default
    <M>  Generic IEEE 802.11 Networking Stack (mac80211)

Device Drivers  --->
  [*] PCI support  --->
        [*] PCI Express Port Bus support
      NVME Support  --->
        <*> NVM Express block device
      SCSI device support  --->
        <*> SCSI disk support

  <*> Serial ATA and Parallel ATA drivers (libata)  --->
        <*> AHCI SATA support

      Character devices  --->
        <M> TPM Hardware Support  --->
            [*] TPM HW Random Number Generator support
            <M> TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface
            <M> TPM 2.0 CRB Interface

  [*] Network device support  --->
        [*] Ethernet driver support  --->
            [*] Intel devices
            <*>     Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support
        [*] Wireless LAN  --->
            [*] Intel devices
            <M>   Intel Wireless WiFi Next Gen AGN - Wireless-N/Advanced-N/Ultimate-N (iwlwifi)
            < >   Intel Wireless WiFi DVM Firmware support
            <M>   Intel Wireless WiFi MVM Firmware support

      I2C support  --->
        I2C Hardware Bus support  --->
            <M> Intel 82801 (ICH/PCH)

  -*- Power supply class support  --->
        [*] Expose power supply sensors as hwmon device

  [*] Watchdog Timer Support  --->
        <*> Intel TCO Timer/Watchdog

  <*> Multimedia support  --->
        [*] Media USB Adapters  --->
              <*> USB Video Class (UVC)

      Graphics support  --->
         <*> /dev/agpgart (AGP Support)  --->
              --- /dev/agpgart (AGP Support)
              -*-   Intel 440LX/BX/GX, I8xx and E7x05 chipset support
         <*> Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)  --->
         [*] Enable legacy fbdev support for your modesetting driver
         <*> Intel 8xx/9xx/G3x/G4x/HD Graphics
                [*]   Enable capturing GPU state following a hang
                [*]     Compress GPU error state
                [*]   Always enable userptr support

  <*> Sound card support  --->
        <*> Advanced Linux Sound Architecture  --->
          [*] PCI sound devices  --->
          <*> HD-Audio  --->
              <*> HD Audio PCI
              <*> Build Realtek HD-audio codec support
              <*> Build HDMI/DisplayPort HD-audio codec support

  [*] USB support  --->
    <*> xHCI HCD (USB 3.0) support
    <*> EHCI HCD (USB 2.0) support

  <M> MMC/SD/SDIO card support  --->
        <M> Secure Digital Host Controller Interface support
        <M>   SDHCI support on PCI bus

  [*] X86 Platform Specific Device Drivers  --->
        <*> ThinkPad ACPI Laptop Extras
        [*]   Console audio control ALSA interface
        [*]   Video output control support
        [*]   Support NVRAM polling for hot keys

Configuration

Portage

FILE /etc/portage/make.conf
# Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
MAKEOPTS="-j8"
CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3"

# drivers
#
INPUT_DEVICES="libinput"
VIDEO_CARDS="intel"

libinput

FILE /etc/X11/xorg.conf.d/40-libinput.confConfigure touchpad
Section "InputClass"
     Identifier "libinput touchpad catchall"
     MatchIsTouchpad "on"
     MatchDevicePath "/dev/input/event*"
     Option "Tapping" "True" # Touchpad tapping enabled
     Option "TappingDrag" "False" # Never drag                                                                         
     Option "TransformationMatrix" "0.96 0 0 0 0.96 0 0 0 1" # Slight accel
     Driver "libinput"
EndSection

Display backlight

To control the display backlight install sys-power/acpilight:

root #emerge --ask sys-power/acpilight

Make the desired users a part of the video group to set the display brightness.

Tip
user $udevadm monitor
can be used to analyze whether a backlight key press actually triggers a value change.

Keyboard backlight

The keyboard backlight is working out of the box (with a keyboard actually supporting the backlight), and can be controlled by using the Fn+Space keys without any further adjustments. There are 3 predefined steps of the keyboard backlight. 0, 50 and 100.

To display the current setting of keyboard backlight use the -ctrl tpacpi::kbd_backlight command line option for xbacklight.

To show the available adjustment steps use following command, it will show 3 steps:

user $xbacklight -ctrl tpacpi::kbd_backlight -get-steps

To display the current setting use following command:

user $xbacklight -ctrl tpacpi::kbd_backlight -getf

Troubleshooting

Processor throttles under load

Lenovo Thinkpad T480 is one of the devices hit by CPU package power limit bug. The bug causes the affected processors to throttle its frequency down to the base line (~1.8GHz) during a multi-core load (e.g. kernel compilation).[1]

There is a simple utility correcting the power limit configuration - sys-power/throttled:

root #emerge --ask sys-power/throttled

External resources

References

  1. ↑ T480s Linux throttling bug, Reddit.com
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