Add acpi_osi kernel option

docs/DellLatitude7490.txt

@@ -22,53 +22,8 @@ have been:
   - 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
+  - Adding i915.modeset=0 to the boot line: FAILED
+  - Adding acpi_osi='Windows 2019' to the boot line: 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
+Currently the "acpi_osi='Windows 2019'" kernel option seems to be
+working.