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Created February 3, 2018 22:27
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  1. greigdp created this gist Feb 3, 2018.
    22 changes: 22 additions & 0 deletions xps-9370.md
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    # Install Notes - Dell XPS 13 (9370) 2018

    The laptop works well on Archlinux. A few notes based on the [installation guide for the previous version](https://wiki.archlinux.org/index.php/Dell_XPS_13_(9360)).

    ## Intel GPU Power Saving

    Per the Arch wiki, more power can be saved by creating `/etc/modprobe.d/i915.conf`with the following content:

    ```
    options i915 modeset=1 enable_rc6=1 enable_fbc=1 enable_guc_loading=1 enable_guc_submission=1 enable_psr=1
    ```
    (some of these options might be redundant; specifically PSR appears to be enabled by default, and modesetting is probably already in use)

    ## Sleep Mode Power Usage

    After initial installation, sleep mode appeared to be fairly inefficient, consuming not much less power than would be used in normal use with the screen off. Investigation revealed that Linux was trying to use the old `s2idle` means of sleep. This is not true S3 ACPI sleep. Check the sleep mode by doing `cat /sys/power/mem_sleep` and see whether the selected sleep mode (surrounded by square brackts) is `s2idle` or `deep`.

    If it is not `deep`, add `mem_sleep_default=deep` to your kernel cmdline variable (for grub, edit `/etc/default/grub` and re-generate the grub configuration. Temporarily test this by echo'ing `deep` to `/sys/power/mem_sleep` and then put the laptop to sleep - it should take slightly longer to wake than before, and will consume much less power!

    Of interest, the reported issue on the 9360 (2017 model) where leaving Thunderbolt boot enabled results in higher power usage after resuming from sleep appears to be resolved.

    Expect power consumption of around 2 Watts when idle, with screen on low brightness, connected to Wi-Fi. Low power consumption continues after resuming from sleep.