Dell Latitude E7270

From ArchWiki
Hardware PCI/USB ID Working?
Touchpad Yes
Keyboard Yes
Integrated GPU Yes
Webcam 0bda:5686 Yes
Ethernet Yes
Bluetooth 8087:0a2b Untested
SD-card reader Untested
Audio 8086:9dc8 Yes
Wireless 8087:0a2b Yes
Fingerprint reader 0a5c:5834 No
TPM Untested


Audio output via the headphone port does not work if the microphone is muted when the laptop is started. Unmuting the microphone fixes the issue, it can be savely muted afterwards.


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.

Function keys

Key Visible?1 Marked?2 Effect
Fn+Esc No Yes Toggles Fn lock
Fn+F1 Untested Yes XF86AudioMute
Fn+F2 Untested Yes XF86AudioLowerVolume
Fn+F3 Untested Yes XF86AudioRaiseVolume
Fn+F4 Untested Yes XF86AudioMuteVolume
Fn+F5 Untested Yes XF86AudioMicMute
Fn+F6 Untested Yes
Fn+F7 No No Blank
Fn+F8 Untested Yes ?
Fn+F9 Untested Yes XF86Search
Fn+F10 No Yes Keyboard backlight
Fn+F11 Untested Yes XF86MonBrightnessDown
Fn+F12 Untested Yes XF86MonBrightnessUp
Fn+PrtScr No Yes RfKill
Fn+Insert No Yes sleep

Frozen CPU frequency scaling

If you experience CPU frequency scaling freezing, i.e. your cpu stays at the lowest idle frequency follow these steps:

  1. shutdown your laptop
  2. remove back cover
  3. unplug battery
  4. hold power button for 20s (Count to 40 to be sure)
  5. replug battery
  6. attach back cover
  7. start laptop and retest

See also FS#56866.

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.