Dell Latitude E7270 - ArchWiki

# Dell Latitude E7270

## Hardware Overview

Output of `lspci -nn`:

    00:00.0 Host bridge [0600]: Intel Corporation Skylake Host Bridge/DRAM Registers [8086:1904] (rev 08)
    00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 520 [8086:1916] (rev 07)
    00:04.0 Signal processing controller [1180]: Intel Corporation Skylake Processor Thermal Subsystem [8086:1903] (rev 08)
    00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller [8086:9d2f] (rev 21)
    00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
    00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
    00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] [8086:9d03] (rev 21)
    00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 [8086:9d14] (rev f1)
    00:1c.5 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 [8086:9d15] (rev f1)
    00:1d.0 PCI bridge [0604]: Intel Corporation Device [8086:9d1a] (rev f1)
    00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC Controller [8086:9d48] (rev 21)
    00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC [8086:9d21] (rev 21)
    00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d70] (rev 21)
    00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus [8086:9d23] (rev 21)
    00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection I219-LM [8086:156f] (rev 21)
    01:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
    02:00.0 Network controller [0280]: Intel Corporation Device [8086:093c] (rev 3a)
    03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)

Output of `lsusb`:

    Bus 002 Device 006: ID 413c:81b6 Dell Computer Corp.
    Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
    Bus 001 Device 003: ID 0a5c:5834 Broadcom Corp.
    Bus 001 Device 002: ID 1bcf:28b8 Sunplus Innovation Technology Inc.
    Bus 001 Device 006: ID 048d:1167 Integrated Technology Express, Inc.
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

## Sound

Initially the headphone port did not work, after setting Auto-mute to Lineout+Speaker and a reboot it started working

## Display

According to `cat /sys/kernel/debug/dri/0/i915_edp_psr_status`:

    Sink_Support: yes
    Source_OK: no
    Enabled: no
    Active: no
    Busy frontbuffer bits: 0x000
    Re-enable work scheduled: no
    Main link in standby mode: no
    HW Enabled & Active bit: no

The FullHD panel supports psr, but the i915 psr implementation for skylake has Known Bugs

## What does not work

- Fingerprint Reader (0a5c:5834)
- DW5811e stops working after suspend, presumably the UEFI does initial configuration, needs more testing
  - Per LKML runtime power management does not work for the chip (EM7455) used in the DW5811e, disabling runtime pm and reseting the device makes it usable.

Category:

- Dell