Dell XPS 13 (9360)
The Dell XPS 13 Late 2016 (9360) is the fourth-generation model of the XPS 13 line. The laptop is available since October (pre-2017 model) in both a standard edition with Windows installed as well as a pre-2017 model and a 2017 model (with insignificant hardware differences) Developer Edition with Ubuntu installed.
Content Adaptive Brightness Control
In the XPS 13 the display panels (both FHD and QHD+) come with Content Adaptive Brightness Control (usually referred to as CABC or DBC) embedded in the panel firmware - it adjusts the screen brightness depending on the content displayed on the screen. While it saves a bit of power, it is generally undesirable, especially for Linux users who are likely to be switching between dark and light screen content. Dell has issued a fix for this, however it is only available to run in Windows. The fix is available directly from Dell.
To test if your XPS 13 is affected by the CABC, go to this test page. It is possible to apply Dell's firmware update using a portable Windows 10 on a USB device:
- Install (for example) woeusbAUR
- Download a Windows 10 ISO from Microsoft's website
- Create a portable Windows 10 installation using woeusb
- Boot the XPS 13 from your Windows 10 USB device (F12)
- In Windows, download and install the latest driver for the Intel Graphics controller
- Then download and install this tool to update the panel firmware. The tool gives you the option to disable CABC
- Reboot (from USB)
- Reboot to Arch Linux and rerun the test
Power saving
It is possible to save around ~10/20% energy with some tricks.
- The SD card adapter can be disabled in BIOS settings to save ~0.5W.
Undervolting (and fanless)
- It is possible to undervolt the CPU and GPU with intel-undervolt. Each individual CPU requires manual tweaking - no well-known good values exist for any models, even for the same CPU model. It only work with 2.13.0 and previous bios update, because Dell has disabled it for security reasons. If you downgrade from 2.14.2 and next updates, you have to factory reset your BIOS settings or you will continue to get "CPU (0): Values do not equal / GPU (1): Values do not equal / CPU Cache (2): Values do not equal".
- Example I5-7200U base stable value (tolerance to undervolting could be a little different for your same CPU):
/etc/intel-undervolt.conf
undervolt 0 'CPU' -153 undervolt 1 'GPU' -115 undervolt 2 'CPU Cache' -80 undervolt 3 'System Agent' 0 undervolt 4 'Analog I/O' 0
- The GPU can consume less power with the
i915.enable_fbc=1kernel module parameter (see Intel graphics#Module-based options for more details). Other known good options are enabled by default on 5.3+ kernel versions.
- When the laptop is undervolted, it is almost fanless most of time, excepted with high CPU/GPU usage (encoding, games...).
NVM Express SSD
Like Thunderbolt, Dell have limited in hidden bios settings NVME PCIE Bus to 2x instead of 4x (unofficially for energy saving reasons). There is actually not know tricks to bypass this setting. This setting limit bus speed to 1,4GB/s instead of 3,8GB/s.
For some devices it might be necessary to set a higher value for the nvme_core.default_ps_max_latency_us parameter to enable all power saving states. This parameter has to be set on the kernel command line.
For the Toshiba 512GB SSD used in some models of the XPS 13 the value to enable all states is 170000 (the combined latency of entering and leaving the highest power state, add nvme_core.default_ps_max_latency_us=170000 to your kernel command line). For the 1TB SSD this valued should be increased to 180000 instead. To check if all states are enabled you can use the nvme-cli package, which provides the nvme-cli command:
# nvme get-feature -f 0x0c -H /dev/nvme0 get-feature:0xc (Autonomous Power State Transition), Current value:0x000001 Autonomous Power State Transition Enable (APSTE): Enabled Auto PST Entries ................. Entry[ 0] ................. Idle Time Prior to Transition (ITPT): 1500 ms Idle Transition Power State (ITPS): 3 ................. Entry[ 1] ................. Idle Time Prior to Transition (ITPT): 1500 ms Idle Transition Power State (ITPS): 3 ................. Entry[ 2] ................. Idle Time Prior to Transition (ITPT): 1500 ms Idle Transition Power State (ITPS): 3 ................. Entry[ 3] ................. Idle Time Prior to Transition (ITPT): 8500 ms Idle Transition Power State (ITPS): 4 .................
If the power states are enabled there should be values for ITPT and ITPS in the first entries. Also the ITPS-value of the last filled entry should be the highest power saving-state of the SSD (which can be viewed using smartctl -a /dev/nvme0 or nvme id-ctrl /dev/nvme0).
Video
The Intel GPU works fine using the i915 driver. Consult Intel graphics for a detailed installation and configuration guide as well as for Intel graphics#Troubleshooting.
If you have the QHD+ (3200x1800) model, also check out HiDPI for UI scaling configurations.
Wireless
The Killer 1535 Wireless Adapter is functional and the required ath10k firmware is included in linux-firmware but the hardware/firmware/driver is unstable and buggy on Linux. The connection speed reported by iw is limited to 1-6Mbits/s. However this is just the output being wrong. The real connection speed is not limited to this value. Some users are experiencing issues, regardless of the OS, where the connection is dropped under heavy load but reconnects after a moment. This might not be noticed during browsing at all but becomes apparent in online games. Signs of this problem seems to be two kinds of messages in dmesg:
pcieport 0000:00:1c.4: AER: Corrected error received: id=00e4 pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e4(Transmitter ID) pcieport 0000:00:1c.4: device [8086:9d14] error status/mask=00001000/00002000 pcieport 0000:00:1c.4: [12] Replay Timer Timeout
And also:
CPU: 3 PID: 1410 Comm: irq/133-ath10k_ Not tainted Hardware name: Dell Inc. XPS 13 9360/0839Y6, BIOS 2.1.0 08/02/2017 Call Trace: <IRQ> dump_stack+0x63/0x82 __warn+0xcb/0xf0 warn_slowpath_null+0x1d/0x20 net_rx_action+0x274/0x3a0 ? irq_finalize_oneshot.part.35+0xe0/0xe0
As of February 2018, Dell support suggests to update the firmware of the network adapter in the following way:
- Confirm that you have QCA6174 checking the output of
# lspci
- Download the latest firmware and extract the archive contents
- Substitute the
QCA6174folder in/lib/firmware/ath10k/with the one downloaded - Inside the new folder, rename
firmware-4.bin_WLAN.RM.2.0-00180-QCARMSWPZ-1tofirmware-4.bin - Reboot and test the new Killer Wi-Fi firmware
This solution may not fix the issue: Some users reported that the connection dropped even with the updated firmware. You can also try using the newer firmware firmware-6.bin_WLAN.RM.4.4.1-00102-QCARMSWP-1 by downloading that file from https://github.com/kvalo/ath10k-firmware/blob/master/QCA6174/hw3.0/4.4.1.c1/firmware-6.bin_RM.4.4.1.c1-00042-QCARMSWP-1, copying it to /usr/lib/firmware/ath10k/QCA6174/hw3.0/ and renaming it to firmware-6.bin.
Reboot and verify that this newer firmware is used by running
# dmesg | grep ath
ath10k_pci 0000:3a:00.0: firmware ver RM.4.4.1.c1-00042-QCARMSWP-1 api 6 features wowlan,ignore-otp crc32 40fb7bdd
Bluetooth
After following the instructions given at Bluetooth tethering of internet connections via phone works immediately.
See Troubleshooting when having issues with Bluetooth and suspend (blinking CapsLock).
Thunderbolt 3 / USB 3.1
The USB-C port supports Thunderbolt 3, Displayport-over-USB-C and USB power delivery as well as USB 3.1.
Dell have limited in hidden bios settings Thunderbolt PCIE Bus to 2x instead of 4x (unofficially for energy saving reasons). There is actually not know tricks to bypass this setting.
Ethernet repeatedly disconnects/reconnects with Dell USB-C adapter (DA200)
Use of a power management package (such as TLP) may cause the ethernet adapter to repeatedly disconnect and reconnect. If this happens, disable/blacklist USB autosuspend for the ethernet adapter. (On my laptop, this is the device Bus 004 Device 007: ID 0bda:8153 Realtek Semiconductor Corp in the output of lsusb.)
USB-C compatibility chart
Thunderbolt firmware updates
The thunderbolt controller in the laptop has an embedded firmware. The laptop ships with firmware version NVM 18, and the most recent available version from Dell's website is NVM 26. If encountering compatibility problems with Thunderbolt accessories (such as the DA-200), the firmware may need to be updated. If you have fwupd (see: #Firmware updates) set up then you should receive this update automatically. Otherwise, you can install it manually as follows.
Dell maintained a github repository with the firmware, but abandoned it now that the firmware is on LVFS. The current version is available as 0x075B_secure.bin (or 0x082A for newer model, see instructions below) inside the Windows package. This can be extracted with p7zip.
Here is a short list of steps to update the Thunderbolt-Firmware on linux 4.13+ (use at your own risk):
- Force enable the thunderbolt controller (or plug in a device to enable it)
# echo 1 > /sys/bus/wmi/devices/86CCFD48-205E-4A77-9C48-2021CBEDE341/force_power
- Check your model ID. If it is 0x082A, use the 0x082A firmware instead of the 0x075B one.
# cat /sys/bus/thunderbolt/devices/0-0/device
- Flash the 9360 firmware from the thunderbolt-nvm-linux repository to a non active NVME memory spot
# dd if=payloads/0x075B.bin of=/sys/bus/thunderbolt/devices/0-0/nvm_non_active0/nvmem
- Trigger the update process
# echo 1 > /sys/bus/thunderbolt/devices/0-0/nvm_authenticate
- At this point, your screen should flick a couple of time. Verify that the update is done by checking that authenticate returns 0
# cat /sys/bus/thunderbolt/devices/0-0/nvm_authenticate
- Verify the new nvme version (it should return 26.1)
# cat /sys/bus/thunderbolt/devices/0-0/nvm_version
- Put the controller back in normal mode
# echo 0 > /sys/bus/wmi/devices/86CCFD48-205E-4A77-9C48-2021CBEDE341/force_power
SATA controller
When the SATA-controller is set to RAID On in BIOS, the SSD is not recognized, because the kernel does not support remapped AHCI device, see [1]. Set to AHCI before attempting to install Arch.
Touchpad
The touchpad has no explicit buttons. The button is built into the pad's surface. There is a small line printed on the pad separating left/right click areas, and libinput does the same separation in software.
Libinput also provides a middle button – to issue a middle click, simply press on the middle area right between the virtual left and right buttons (i.e. on the small printed separator line).
Remove psmouse errors from dmesg
If running dmesg | grep -i psmouse as root returns an error, but your touchpad still works, then it might be a good idea to disable psmouse. First create a config file:
/etc/modprobe.d/modprobe.conf
blacklist psmouse
Then add this file to /etc/mkinitcpio.conf:
... FILES=(/etc/modprobe.d/modprobe.conf) ...
Rebuild your initial ramdisk image (see Mkinitcpio#Image creation and activation).
Touchscreen
Gestures
Refer to libinput#Gestures for information about the current development state and available methods.
Scrolling in Firefox
See Firefox/Tweaks#Pixel-perfect trackpad scrolling. This enables both touchscreen scrolling and high-res trackpad scrolling.
Keyboard backlight
By default, the keyboard backlight turns off after 10 seconds of inactivity. Some users might find this too short and annoying. The delay can be increased (or decreased) by editing this file:
/sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/stop_timeout
You can also change the brightness (0-2) by editing the following file. This is identical to pressing F10 on your keyboard:
/sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/brightness
Hidden keyboard keys
There are additional Fn+<Key> (sequences) that are not marked at all on the keyboard but underlying hardware generates them anyway. Here they are (if you find more add them to the table below):
| Fn+<Key> | Resulting key (sequence) |
|---|---|
| Fn+Ins | XF86Sleep |
| Fn+Super_L | Super_R |
| Fn+B | Pause |
| Fn+R | |
| Fn+S | Scroll_Lock |
| Fn+A / D / E / F / G / T / Q / W | XF86Launch3 |
Unobtrusive mode
If enabled in BIOS, pressing Fn+F7 will disable sound, keyboard and screen backlight, the charging LED and the LED on the power button. Unfortunately there seems to be no way to disable just the LEDs- some users recommend black electrical tape. The output of `smbios-token-ctl -d` only list changes related to screen, keyboard and sound when unobtrusive mode is active.
Firmware updates
Dell provides firmware updates via fwupd. In order to update the BIOS make sure to also install the optional dependency tpm2-tss. Please note if you have used a bind mount partition for /boot or are booting via legacy BIOS/CSM instead of UEFI, you will not be able to use the fwupd utility - instead use the method below.
Alternatively, the BIOS update can be downloaded from the Dell website (filter by "BIOS") and placed in a location accessible to the firmware. This could be the '/boot' folder, or a FAT32 formatted USB stick. Then restart your laptop and hit F12 while starting. In the boot menu choose firmware update and select the downloaded file.
Sleep to idle (s2idle, S0ix)
According to the method described in an Intel article, this device supports Low Power S0 Idle (S0ix).
To try S0ix, write freeze to /sys/power/state (see Power management/Suspend and hibernate). The system should behave like it is sleeping, except the power button light is on. Press power button to wake up.
S0ix can be used as an alternative to "Sleep to RAM", by changing the following systemd configuration:
/etc/systemd/sleep.conf
[Sleep] SuspendState=freeze mem standby
You may need to prevent the xHCI controller from waking up the system. Write XHC to /proc/acpi/wakeup, or write disabled to /sys/devices/pci0000:00/0000:00:14.0/power/wakeup. Different models may have different PCI ID for the xHCI controller, see the 4th column of grep XHC /proc/acpi/wakeup.
To make the change permanent, put a file to /etc/tmpfiles.d:
/etc/tmpfiles.d/disable-xhci-wakeup.conf
w /sys/devices/pci0000:00/0000:00:14.0/power/wakeup - - - - disabled
If you want to enable waking up by key press:
/etc/tmpfiles.d/enable-key-press-wakeup.conf
# Enable key press to wakeup w /sys/devices/platform/i8042/serio0/power/wakeup - - - - enabled
Troubleshooting
EFISTUB does not boot
The BIOS does not pass any boot parameters to the kernel. Use a UEFI boot loader instead.
It is possible to work around this issue by building single file EFI images containing the parameters. See [2].
Not waking from suspend
Update the BIOS to 1.0.7 to patch this issue.
Power drain after waking from standby
Some users recognised ~2W more power consumption after waking up from standby. Go to the UEFI Firmware Settings (tap the F2 key when the Dell logo appears) and uncheck the 'Enable Thunderbolt Boot Support'. You may use powertop or powerstat-gitAUR to reproduce and check this behaviour yourself.
Popping sound on headphones/external speakers
Power saving being enabled on the audio chip will cause the hissing and popping to appear.
Have a look at ALSA troubleshooting#Pops when starting and stopping playback and ALSA troubleshooting#Popping sound after resuming from suspension.
If you are using tlp, it will activate power saving by default when on battery. Edit /etc/default/tlp and disable it.
Crackling sound with screen changes
Some users experienced a weird crackling, white noise sound when the display is changing its contents after waking the computer from S3 sleep..
This issue should be patched as of the 4.14.15 kernel.
If you are still encountering this issue, try manually applying this patch[3]. Adding the kernel parameter i915 enable_guc=1 as described in Intel graphics might also help, however multiple people have reported that this does not fix the problem completely.
Coil whine
Unfortunately Dell still did not fix this issue and the sound for my model was very loud. The issue seems to be connected to the graphic card. For some users, it is possible to reduce it a lot by activating frame buffer compression "enable_fbc=1" Intel graphics#Framebuffer compression (enable_fbc). The coil whine will then start again under heavy graphic load. For the touchscreen model, this may be very often, due to the high resolution screen. In a similar vein, the display can be run at a lower resolution, again reducing the load on the graphics card.
Freezing after waking from suspend
Installing xf86-video-intel-gitAUR is reported to fix this.
When using a bluetooth device (confirmed for a Logitech MX Anywhere 2S and gnome), the computer frequently does not respond and the LED on CapsLock blinks. Using the solution from launchpad helps in this case.
Continuous hissing sound with headphones
Open alsamixer and set "Headphone Mic Boost" gain to 10 dB (See discussion on reddit). Note that this does reduce the volume slightly.
You may also run the equivalent command:
$ amixer -c PCH cset 'name=Headphone Mic Boost Volume' 1
PulseAudio will rewrite these ALSA settings on each boot. So if you use PulseAudio you may change its config to make the setting permanent:
/usr/share/alsa-card-profile/mixer/paths/analog-input-headphone-mic.conf
[Element Headphone Mic Boost] required-any = any switch = select # Replace "volume = merge" by: volume = 1 override-map.1 = all override-map.2 = all-left,all-right
/usr/share/alsa-card-profile/mixer/paths/analog-input-internal-mic.conf
[Element Headphone Mic Boost] switch = off # Replace "volume = off" by: volume = 1
This change will be overwritten by an upgrade of PulseAudio though. To make these changes persistent across upgrades you can use a pacman hook:
/etc/pacman.d/hooks/headphones_hissing.hook
[Trigger] Operation = Install Operation = Upgrade Type = Package Target = pulseaudio [Action] Description = Set default Headphone Mic Boost volume to 1... When = PostTransaction Exec = /usr/bin/sed -i '/\[Element Headphone Mic Boost\]/,/^$/s/volume = .*/volume = 1/' /usr/share/alsa-card-profile/mixer/paths/analog-input-internal-mic.conf /usr/share/alsa-card-profile/mixer/paths/analog-input-headphone-mic.conf
Alternatively, you can avoid these changes to files under /usr by calling amixer at startup. The first solution would be to add the command above to the profile of your shell (~/.bash_profile in case of bash). Or you set up a systemd user service that is pulled in by PulseAudio:
~/.config/systemd/user/headphones_hissing.service
[Unit] Description=Disable hissing sound with headphones After=pulseaudio.service PartOf=pulseaudio.service [Service] Type=oneshot ExecStart=amixer -c PCH cset 'name=Headphone Mic Boost Volume' 1 [Install] WantedBy=pulseaudio.service
To give these benefits to the other users on your system, you can set this globally, i.e. call amixer in /etc/profile and put the systemd unit in /etc/systemd/user/headphones_hissing.service and enable it globally by using the --global option respectively.
Blank screen issue after booting
If using "late start" KMS (the default) and the screen goes blank when loading modules, it may help to add i915 and intel_agp to the initramfs or using a special kernel parameter. Consult Intel graphics#Blank screen during boot, when "Loading modules" for more information about the kernel parameter way and have a look at Kernel mode setting#Early KMS start for a guide on how to setup the modules for the initramfs.
Fingerprint sensor
Dell officially does not support fingerprint reader functionality [4], however an effort on reverse engineering the protocol of Validity 138a:0090, 138a:0094, 138a:0097 fingerprint readers can be found at github [5].