Dell Latitude 7490

This article or section does not follow the
Laptop page guidelines
.
Reason:
Needs a hardware table and an accessibility, firmware and function keys section (Discuss in
Talk:Dell Latitude 7490
)
Hardware
PCI/USB ID
Working?
Touchpad
Yes
Keyboard
Yes
GPU
8086:5917
Yes
Webcam
0bda:568c
Yes
Ethernet
8086:15d7
Yes
Bluetooth
168c:003e
Yes
SD-card reader
10ec:525a
Yes
Audio
8086:9d71
Yes
Wi-Fi
168c:003e
Yes
TPM
Untested
The Latitude 7490 is virtually identical to the
Dell Latitude 7480
with the exception of an upgrade to Kabylake-R processors (8th gen).
What works
Basic hardware (display, touchpad, trackpoint, keyboard, Wi-Fi, Ethernet, Bluetooth, audio, hibernation, etc.)
Keyboard backlight control
Screen backlight control
Fn/Hotkeys, including Fn-lock
Contact SmartCard reader
Qualcomm Snapdragon X7 LTE Modem
USB-C (connected to Android phone, was able to charge phone and read files)
USB-C power delivery
DisplayPort Alternate Mode for USB-C
USB-C Display port with D6000 docking station (triple screen with dual 4k works) + power delivery
Thunderbolt 3.0 (shows up in gnome-settings, works with Dell TB16 dock (Ethernet, DisplayPort @120hz, USB, power delivery, etc))
What does not work
Fingerprint reader (tracked at
https://gitlab.freedesktop.org/libfprint/libfprint/issues/88
)
Presumably NFC
What was not tested
Contactless SmartCard (probably works since it was detected by
pcsc_scan
TPM 2.0 (There is an error in the output of
dmesg
,
tpm tpm0: A TPM error (2314) occurred attempting the self test
)
Function keys
Key
Visible?
1
Marked?
2
Effect
Fn+Esc
No
Yes
Enables Fn lock
Fn+F1
Yes
Yes
XF86AudioMute
Fn+F2
Yes
Yes
XF86AudioLowerVolume
Fn+F3
Yes
Yes
XF86AudioRaiseVolume
Fn+F4
Yes
Yes
Mute Microphone
Fn+F5
Yes
Yes
Num Lock
Fn+F6
Yes
Yes
Scroll Lock
Fn+F7
No
No
Unobtrusive mode
Fn+F8
Yes
Yes
Inputs
Super+p
Fn+F9
Yes
Yes
XF86Search
Fn+F10
No
Yes
Enables/disables keyboard backlight
Fn+F11
Yes
Yes
XF86MonBrightnessDown
Fn+F12
Yes
Yes
XF86MonBrightnessUp
Fn+Print
Yes
3
Yes
XF86RFKill
, will hard-block Wi-Fi and soft-block Bluetooth. Press again to disable
Fn+Ins
Yes
3
No
XF86Sleep
The key is visible to
xev
and similar tools
The physical key has a symbol on it, which describes its function
systemd-logind handles this by default
Bluetooth
Do not set control to auto for Bluetooth module (0cf3:e007), otherwise sound via Bluetooth headset may tear when Wi-Fi is actively used. If you have TLP, set
USB_EXCLUDE_BTUSB
to
1
.
It helps in some cases, but with some devices (e.g. CMF Buds Pro) none of any troubleshooting tips helped. Sound is choppy and unstable all the time.
Better solution might be replacing Wi-Fi card, for example Intel Wi-Fi. Unlike thinkpads there is no device whitelist, so there will no difficulties with replacing network card.
Accessibility
Note
Blind users should request the help of a sighted person to change firmware settings.
BIOS Settings Overview
The "BIOS Settings" interface can be reached by pressing
F2
during POST.
The BIOS settings page itself is GUI based, with black text on a white background. There is a panel taking approximately 20% of the screen on the left, containing various sub-categories of settings. The main panel takes 80% of the screen to the right, and contains the settings associated with each sub-category. The font is relatively large, and toggle switches will appear as light grey if set to 'off', and turn light blue if set to 'on'.
The GUI does not have any built-in screen reader or other accessibility settings, but due to its simple colour scheme, and relatively large text size, it should be somewhat accessible for partially sighted people using an external screen reader as an accessibility aid. However, it is a GUI-based interface with lots of available settings, and lots of visual clutter in text form. As such it is likely to be difficult to navigate for people with severe visual impairment or total blindness, who are using an external reader alone. It is possible to enable/disable "Help Text", and "Advanced Setup" using two toggle switches that appear in the top left corner of the screen; disabling them should help reduce this clutter and improve readability (but may also hide useful info/settings!).
There are "Show all" and "Search" functions available towards the top right of the screen, which can ease navigation considerably.
The BIOS can be updated through the "One-Time Boot Menu" (press
F12
during POST).
BIOS Settings Navigation
The "BIOS Settings" interface can be navigated using a keyboard, or mouse - with mouse being the preferred mode. Keyboard navigation keys are as follows:
Key
Effect
Up
Moves to the previous field.
Down
Moves to the next field.
Enter
Selects a value in the selected field (if applicable) or follow the link in the field.
Space
Expands or collapses a drop-down list, if applicable.
Tab
Moves to the next focus area
PageUp
Scrolls the currently selected view up.
PageDown
Scrolls the currently selected view down.
Esc
Moves to the previous page until you view the main screen. Pressing Esc in the main screen displays a message that prompts you to save any unsaved changes and restarts the system.