modeset:Use kernel modesetting [KMS] (0=disable, 1=on, -1=force vga console preference [default]) (int) panel_ignore_lid:Override lid status (0=autodetect, 1=autodetect disabled [default], -1=force lid closed, -2=force lid open) (int) semaphores:Use semaphores for inter-ring sync (default: -1 (use per-chip defaults)) (int) enable_rc6:Enable power-saving render C-state 6. Different stages can be selected via bitmask values (0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. default: -1 (use per-chip default) (int) enable_fbc:Enable frame buffer compression for power savings (default: -1 (use per-chip default)) (int) lvds_channel_mode:Specify LVDS channel mode (0=probe BIOS [default], 1=single-channel, 2=dual-channel) (int) lvds_use_ssc:Use Spread Spectrum Clock with panels [LVDS/eDP] (default: auto from VBT) (int) vbt_sdvo_panel_type:Override/Ignore selection of SDVO panel mode in the VBT (-2=ignore, -1=auto [default], index in VBT BIOS table) (int) reset:Attempt GPU resets (default: true) (bool) enable_hangcheck:Periodically check GPU activity for detecting hangs. WARNING: Disabling this can cause system wide hangs. (default: true) (bool) enable_ppgtt:Override PPGTT usage. (-1=auto [default], 0=disabled, 1=aliasing, 2=full) (int) enable_execlists:Override execlists usage. (-1=auto [default], 0=disabled, 1=enabled) (int) enable_psr:Enable PSR (default: false) (int) preliminary_hw_support:Enable preliminary hardware support. (int) disable_power_well:Disable display power wells when possible (-1=auto [default], 0=power wells always on, 1=power wells disabled when possible) (int) enable_ips:Enable IPS (default: true) (int) fastboot:Try to skip unnecessary mode sets at boot time (default: false) (bool) prefault_disable:Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only. (bool) load_detect_test:Force-enable the VGA load detect code for testing (default:false). For developers only. (bool) invert_brightness:Invert backlight brightness (-1 force normal, 0 machine defaults, 1 force inversion), please report PCI device ID, subsystem vendor and subsystem device ID to dri-devel@lists.freedesktop.org, if your machine needs it. It will then be included in an upcoming module version. (int) disable_display:Disable display (default: false) (bool) disable_vtd_wa:Disable all VT-d workarounds (default: false) (bool) enable_cmd_parser:Enable command parsing (1=enabled [default], 0=disabled) (int) use_mmio_flip:use MMIO flips (-1=never, 0=driver discretion [default], 1=always) (int) mmio_debug:Enable the MMIO debug code for the first N failures (default: off). This may negatively affect performance. (int) verbose_state_checks:Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions. (bool) nuclear_pageflip:Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false). (bool) edp_vswing:Ignore/Override vswing pre-emph table selection from VBT (0=use value from vbt [default], 1=low power swing(200mV),2=default swing(400mV)) (int) enable_guc_submission:Enable GuC submission (default:false) (bool) guc_log_level:GuC firmware logging level (-1:disabled (default), 0-3:enabled) (int)