Dell Latitude 7490
==================

Graphics
--------

The kernel crashes frequently with graphical glitches. Add the following
to the kernel command line to prevent this:

    i915.enable_psr=0


Crashes when locking or sleeping
--------------------------------

Still working out the cause for this one. Current troubleshooting steps
have been:

  - Using X11 instead of Wayland: FAILED
  - Using KDE Plasma instead of Gnome: FAILED
  - Using XDM instead of GDM: FAILED
  - Masking rtkit-daemon.service: FAILED
  - Using newer kernel from Debian Backports: FAILED
  - Using Fedora instead of Debian: FAILED
  - Adding i915.modeset=0 to the boot line: TESTING
  - Adding i915.enable_dc=0 to the boot line: TESTING
  - Adding acpi=off to the boot line: TESTING
  - Adding MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0 to /etc/environment: TESTING
  - Adding MUTTER_DEBUG_FORCE_KMS_MODE=simple to /etc/environment: TESTING


i915 module options
-------------------

The following are available options for the i915 module:

    disable_display
    disable_power_well
    dmc_firmware_path
    edp_vswing
    enable_dc
    enable_dp_mst
    enable_dpcd_backlight
    enable_fbc
    enable_guc
    enable_gvt
    enable_hangcheck
    enable_ips
    enable_psr
    enable_psr2_sel_fetch
    error_capture
    fastboot
    force_probe:
    force_reset_modeset_test
    guc_firmware_path
    guc_log_level
    huc_firmware_path
    invert_brightness
    lmem_bar_size
    lmem_size
    load_detect_test
    lvds_channel_mode
    memtest
    mitigations
    mmio_debug
    modeset
    nuclear_pageflip
    panel_use_ssc
    psr_safest_params
    request_timeout_ms
    reset
    vbt_firmware
    vbt_sdvo_panel_type
    verbose_state_checks