Dell Latitude 5495

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The Dell Latitude 5495 is a 14" laptop with Ryzen Pro 2500U or 2700U processor.

Hardware

Components

Device Make/model Status Vendor ID / Product ID Kernel driver(s) Kernel version Notes
CPU AMD Ryzen PRO 2500U / 2700U Works N/A N/A 4.19.1
GPIO AMD GPIO Pin Controller Works pinctrl_amd 4.19.2
I2C/SMBus Controller AMD MP2 I2C Controller Works PCI 1022:15e6 i2c_amd_mp2 Driver is currently not mainlined. Get it from [1] or [2]
I2C/SMBus Controller AMD FCH SMBus Controller Works PCI 1022:790b piix4_smbus 4.19.1
TPM TPM 2.0 Works tcg_crb, tpm_tis 4.19.7
SATA AMD FCH SATA Controller Works PCI 1022:7901 ahci 4.19.1
Video AMD Radeon Vega graphics Works PCI 1002:15dd amdgpu 4.19.1
Audio AMD HD Audio Works PCI 1002:15de snd_hda_intel, snd_hda_codec_realtek 4.19.1
Ethernet Broadcom NetXtreme BCM5762 Gigabit Ethernet Works PCI 14e4:1687 tg3 4.19.1
Wireless LAN Qualcomm Atheros QCA6174 802.11ac Works PCI 168c:003e ath10k_pci 4.19.1
Wireless WAN Sierra Wireless EM7455 Not tested USB 413c:81b6 cdc_mbim, qcserial
Touchpad Alps U1 Dual Button Works I2C 044e:120a i2c_hid 4.19.1 Touchpad gestures require i2c_amd_mp2 to work. See #Touchpad
SD Card reader Realtek RTS525A PCI Express Card Reader Works PCI 10ec:525a rtsx_pci, mmc_realtek_pci 4.19.1
Bluetooth Qualcomm Atheros Bluetooth controller Works USB 0cf3:e010 btusb 4.19.1
Webcam Sunplus Innovation Technology Webcam HD Works USB 1bcf:2b96 uvcvideo 4.19.1
Smartcard Reader Broadcom 5880 Not tested USB 0a5c:5833 N/A
Fingerprint Reader Broadcom 5880 Unsupported USB 0a5c:5833 N/A sys-auth/libfprint does not support this, see [3] [4] [5] and others
Hardware Monitoring Works amdgpu, ath10k_pci, k10temp 4.19.1
Hotkeys Works dell_wmi, wmi_bmof, dell_smbios, dell_smo8800, dell_rbtn 4.19.1

ACPI / Power management

Function Status Kernel driver(s) Kernel version BIOS version Notes
CPU frequency scaling Yes intel_pstate 4.19.1 1.2.3
GPU Powersaving (PowerPlay) Yes amdgpu 4.19.1 1.2.3
SATA Power Management (ALPM) Yes 4.19.2 1.2.3
PCIe Power Management (ASPM) Partial 4.19.1 1.2.3 PCIe errors may spam the kernel log unless you disable ASPM through kernel config or with pcie_aspm=off
USB Type C Power Delivery Not tested
Suspend to RAM Yes 4.19.7 1.2.3 See #Suspend
Suspend to disk (hibernate) Yes 4.19.1 1.2.3 See #Suspend
Display backlight control Yes acpi_video 4.19.1 1.2.3
Keyboard backlight control Not tested

Extra hardware information

root #lspci -nnk
00:00.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15d0]
        Subsystem: Dell Device [1028:0814]
00:00.2 IOMMU [0806]: Advanced Micro Devices, Inc. [AMD] Device [1022:15d1]
        Subsystem: Dell Device [1028:0814]
00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:01.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:15d3]
        Kernel driver in use: pcieport
00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:15d3]
        Kernel driver in use: pcieport
00:01.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:15d3]
        Kernel driver in use: pcieport
00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:15db]
        Kernel driver in use: pcieport
00:08.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:15dc]
        Kernel driver in use: pcieport
00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 61)
        Subsystem: Dell FCH SMBus Controller [1028:0814]
        Kernel driver in use: piix4_smbus
        Kernel modules: i2c_piix4
00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
        Subsystem: Dell FCH LPC Bridge [1028:0814]
00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15e8]
00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15e9]
00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15ea]
00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15eb]
        Kernel driver in use: k10temp
        Kernel modules: k10temp
00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15ec]
00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15ed]
00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15ee]
00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:15ef]
01:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter [168c:003e] (rev 32)
        Subsystem: Dell QCA6174 802.11ac Wireless Network Adapter [1028:364a]
        Kernel driver in use: ath10k_pci
        Kernel modules: ath10k_pci
02:00.0 Ethernet controller [0200]: Broadcom Limited NetXtreme BCM5762 Gigabit Ethernet PCIe [14e4:1687] (rev 10)
        Subsystem: Dell NetXtreme BCM5762 Gigabit Ethernet PCIe [1028:0814]
        Kernel driver in use: tg3
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
        Subsystem: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a]
        Kernel driver in use: rtsx_pci
        Kernel modules: rtsx_pci
04:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:15dd] (rev d0)
        Subsystem: Dell Device [1028:0814]
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu
04:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:15de]
        Subsystem: Dell Device [1028:0814]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
04:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Device [1022:15df]
        Subsystem: Dell Device [1028:0814]
04:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15e0]
        Subsystem: Dell Device [1028:0814]
        Kernel driver in use: xhci_hcd
04:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:15e1]
        Subsystem: Dell Device [1028:0814]
        Kernel driver in use: xhci_hcd
04:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Device [1022:15e3]
        Subsystem: Dell Device [1028:0814]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
04:00.7 Non-VGA unclassified device [0000]: Advanced Micro Devices, Inc. [AMD] Device [1022:15e6]
        Subsystem: Advanced Micro Devices, Inc. [AMD] Device [1022:15e4]
05:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 61)
        Subsystem: Dell FCH SATA Controller [AHCI mode] [1028:0814]
        Kernel driver in use: ahci

Installation

EFI stub will boot fine, so you do not need any separate boot loader like GRUB or Syslinux.

After making hardware changes to the internal storage, such as replacing a SATA with M.2 NVMe drive or vice versa, the BIOS/UEFI will get confused on the first boot and mess up the boot order. Subsequent boots will be stable.

This is a common problem with Dell Laptops, cf. [6], step 11.

Configuration details

Compiler flags

See Safe CFLAGS

FILE /etc/portage/make.conf
CHOST="x86_64-pc-linux-gnu"
COMMON_FLAGS="-O2 -pipe -march=znver1"
CFLAGS="${COMMON_FLAGS}"

CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3"

Required packages

Troubleshooting

Suspend

  • After suspend to disk (hibernate), the computer will reboot instead of powering off. (Tested with BIOS version 1.2.3)

Solution: Set hibernation mode to "shutdown" instead of "platform".

root #echo shutdown > /sys/power/disk

For automating this during boot, see /etc/local.d.

  • After suspend to RAM, computer will hang on resume. Next boot, the BIOS will complain about TPM not responding.

Solution: Enable tcg_tis driver, or disable TPM function in the BIOS.

Touchpad

The Alps touchpad is recognized as PS/2 mouse and will provide only some functions. This is because the AMD MP2 I2C controller which it is connected to has no driver in the mainline kernel as of 4.19.

For installing the i2c_amd_mp2 out-of-tree driver, see the link in the table of hardware.

Otherwise, as a workaround, you can use button scrolling, pressing both buttons on the touchpad will cause finger movement to scroll:

FILE /etc/X11/xorg.conf.d/40-libinput.conf
# Match PS/2 Generic Mouse which is actually the touchpad
Section "InputClass"
        Identifier "PS/2 touchpad"
        MatchIsPointer "on"
        MatchProduct "PS/2 Generic Mouse"
        Driver "libinput"
        Option "MiddleEmulation" "true"
        Option "ScrollMethod" "button"
EndSection
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