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Lenovo Thinkpad T420

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After proper configuration, every part of the Thinkpad T420 is Linux friendly.

Hardware

lspci

root #lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation 2nd Generation Core Processor Family DRAM Controller [8086:0104] (rev 09)
	Subsystem: Lenovo 2nd Generation Core Processor Family DRAM Controller [17aa:21ce]
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09)
	Subsystem: Lenovo 2nd Generation Core Processor Family Integrated Graphics Controller [17aa:21ce]
	Kernel driver in use: i915
00:16.0 Communication controller [0780]: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 [8086:1c3a] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family MEI Controller [17aa:21ce]
00:16.3 Serial controller [0700]: Intel Corporation 6 Series/C200 Series Chipset Family KT Controller [8086:1c3d] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family KT Controller [17aa:21ce]
	Kernel driver in use: serial
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
	Subsystem: Lenovo 82579LM Gigabit Network Connection [17aa:21ce]
	Kernel driver in use: e1000e
00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family USB Enhanced Host Controller [17aa:21ce]
	Kernel driver in use: ehci-pci
00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1c20] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family High Definition Audio Controller [17aa:21ce]
	Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 [8086:1c10] (rev b4)
	Kernel driver in use: pcieport
00:1c.1 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 [8086:1c12] (rev b4)
	Kernel driver in use: pcieport
00:1c.3 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 [8086:1c16] (rev b4)
	Kernel driver in use: pcieport
00:1c.4 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 [8086:1c18] (rev b4)
	Kernel driver in use: pcieport
00:1d.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 [8086:1c26] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family USB Enhanced Host Controller [17aa:21ce]
	Kernel driver in use: ehci-pci
00:1f.0 ISA bridge [0601]: Intel Corporation QM67 Express Chipset Family LPC Controller [8086:1c4f] (rev 04)
	Subsystem: Lenovo QM67 Express Chipset Family LPC Controller [17aa:21ce]
00:1f.2 SATA controller [0106]: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller [8086:1c03] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller [17aa:21ce]
	Kernel driver in use: ahci
	Kernel modules: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller [8086:1c22] (rev 04)
	Subsystem: Lenovo 6 Series/C200 Series Chipset Family SMBus Controller [17aa:21ce]
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801
03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] [8086:0085] (rev 34)
	Subsystem: Intel Corporation Centrino Advanced-N 6205 AGN [8086:1311]
	Kernel driver in use: iwlwifi
0d:00.0 System peripheral [0880]: Ricoh Co Ltd PCIe SDXC/MMC Host Controller [1180:e823] (rev 08)
	Subsystem: Lenovo PCIe SDXC/MMC Host Controller [17aa:21ce]
	Kernel driver in use: sdhci-pci

lsusb

root #lsusb
Bus 002 Device 003: ID 17ef:1003 Lenovo Integrated Smart Card Reader
Bus 002 Device 004: ID 05dc:a838 Lexar Media, Inc. 
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 04f2:b221 Chicony Electronics Co., Ltd integrated camera
Bus 001 Device 003: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Installation

Firmware

The Linux firmware package is needed since the Centrino Advanced-N 6205 AGN wifi adapter requires a specific firmware file.

The only file that is needed is the iwlwifi-6000g2a-6.ucode firmware file. It must be compiled directly into the kernel binary. Obtain the file by installing the Linux firmware package:

root #emerge --ask sys-kernel/linux-firmware

Kernel

Here's a link to a pre-configured, hand-selected, Gentoo specific 4.10.10-gentoo kernel config file.

KERNEL Enable support for these hardware drivers:
Device Drivers  --->
   Generic Driver Options  --->
      -*- Userspace firmware loading support
      [*]   Include in-kernel firmware blobs in kernel binary
      (iwlwifi-6000g2a-6.ucode) External firmware blobs to build into the kernel binary
      (/lib/firmware) Firmware blobs root directory
   [*] Network device support  --->
      [*]   Ethernet driver support  --->
         [*]   Intel devices
            <*>     Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support
      [*]   Wireless LAN  -->
         [*]   Intel devices
            <*>     Intel Wireless WiFi Next Gen AGN - Wireless-N/Advanced-N/Ultimate-N (iwlwifi)
            <*>       Intel Wireless WiFi DVM Firmware support
            <*>       Intel Wireless WiFi MVM Firmware support
   I2C support  --->
      I2C Hardware Bus support  --->
   <*> Sound card support  --->
      <*>   Advanced Linux Sound Architecture  --->
         HD-Audio  --->
            <*> HD Audio PCI
            <*> Build HDMI/DisplayPort HD-audio codec support
   <*> MMC/SD/SDIO card support  --->
      <*>   Secure Digital Host Controller Interface support
      <*>     SDHCI support on PCI bus
      [*]       Ricoh MMC Controller Disabler 
      <*>     SDHCI support for ACPI enumerated SDHCI controllers
   X86 Platform Specific Device Drivers  -->
      <*>   ThinkPad ACPI Laptop Extras

See also

External resources

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