Dell Latitude 5491

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The Dell Latitude 5491 is a 14" laptop with 8th generation Intel Core i5/i7 CPU and a dedicated NVidia GeForce MX130 GPU.

Hardware

Standard

Device Make/model Status Vendor ID / Product ID Kernel driver(s) Kernel version Notes
CPU Intel Core i5/i7 8th gen. Works 5.4.38
PCIe controller Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller Works pcieport 5.4.38 Twice
PCIe controller Intel Corporation Cannon Lake PCH PCI Express Root Port Works pcieport 5.4.38 Twice, once used for the Alps synaptics
Video Intel Corporation UHD Graphics 630 Works i915 5.4.38
Video NVidia GeForce MX130 (GM108M) Works nouveau or nvidia 5.4.38 Tested with proprietary drivers
Audio Intel Corporation Cannon Lake PCH cAVS Works snd_hda_intel 5.4.38
Ethernet Intel Corporation Ethernet Connection I219-LM Works e1000e 5.4.38
WiFi Intel Corporation Wireless-AC 9560 [Jefferson Peak] Works iwlwifi 5.4.38 Requires firmware
WWAN Sierra Wireless, Inc. DW5811e Snapdragon™ X7 LTE Not tested 413c:81b6
Bluetooth Bluetooth Works 8087:0aaa btusb 5.4.38
USB controller Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller Works xhci_hcd 5.4.38
Sata controller Intel Corporation 82801 Mobile SATA Controller Works ahci 5.4.38
SD card reader Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader Works rtsx_pci 5.4.38 Does not detect the insertion & removal of the SD card straight away
Webcam Sunplus Innovation Technology Inc. Works 1bcf:2b96 uvcvideo 5.4.38
Fingerprint reader Broadcom Corp 5880 Not tested 0a5c:5834
Thermal Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem Works proc_thermal 5.4.38
Thermal Intel Corporation Cannon Lake PCH Thermal Controller Works intel_pch_thermal 5.4.38
Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model Not working 5.7.38 Linux hardware status
I2C controllers Intel Corporation Cannon Lake PCH Serial IO I2C Controller Works intel-lpss 5.4.38 Twice
SMBus Intel Corporation Cannon Lake PCH SMBus Controller Works i801_smbus 5.4.38

For hardware probes see https://linux-hardware.org/index.php?view=computers&vendor=Dell&model=Latitude+5491

Installation

Firmware

The Linux firmware package will have to be installed, for certain components to work properly

root #emerge --ask sys-kernel/linux-firmware
  • iwlwifi-9000-pu-b0-jf-b0-34.ucode
  • i915/skl_dmc_ver1_27.bin


And add them space-separated in the kernel firmware selection:

KERNEL Enable firmware
Device Drivers  --->
    Generic Driver Options  --->
        (iwlwifi-9000-pu-b0-jf-b0-34.ucode i915/skl_dmc_ver1_27.bin) External firmware blobs to build into the kernel binary
        (/lib/firmware) Firmware blobs root directory

Microcode

Be sure to follow the Wiki page on how to load the Intel microcode

Kernel

Touchpad

To set the touchpad and keyboard knob in the kernel, do the following.

KERNEL Enable support for touchpad and knob
Device Drivers  --->
     I2C support  ---> 
         I2C Hardware Bus support  --->
              <*> Synopsys DesignWare Platform
     Multifunction device drivers  --->
              <*> Intel Low Power Subsystem support in PCI mode
     HID support  --->
         I2C HID support  --->
             <*> HID over I2C transport layer

Do not forget to add the libinput in the INPUT_DEVICE variable of the /etc/portage/make.conf file:

FILE /etc/portage/make.conf
INPUT_DEVICES="libinput"

Here is what is excpected:

user $user ~ # dmesg
[    2.075357] mousedev: PS/2 mouse device common for all mice
[    2.190180] input: DELL0818:00 044E:121F Mouse as /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-9/i2c-DELL0818:00/0018:044E:121F.0001/input/input7
[    2.190347] hid-multitouch 0018:044E:121F.0001: input,hidraw0: I2C HID v1.00 Mouse [DELL0818:00 044E:121F] on i2c-DELL0818:00

SD card reader

KERNEL Enable support for the SD card reader
Device Drivers  --->
     Multifunction device drivers  --->
         <*> Realtek PCI-E card reader
     <*> MMC/SD/SDIO card support  --->
         <*>   Realtek PCI-E SD/MMC Card Interface Driver

Webcam

KERNEL Enable support for the webcam
Device Drivers  --->
    <*> Multimedia support  --->
        [*]   Media USB Adapters  --->.
            <*>   USB Video Class (UVC)

And add a user to the video group to access the /dev/video0.

root #gpassword -a <user> video