I915(4)

NAME
i915 - Driver for Intel i915 family integrated graphics chipsets

DESCRIPTION
The i915 driver provides support for integrated graphics chips by Intel. Please refer the Loader Tunables section in syscons(4) for more information about how to make the console work with i915.

LOADER TUNABLES
Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

drm.i915.enable_psr
    Enable PSR (panel self refresh), only relevant for Haswell and Broadwell CPUs. 1 = enable, 0 = disable (default). To maximize PSR usage, it can be beneficial to set hw.dri.vblank_offdelay (see drm(4)) to a sufficiently low value (or -1), to minimize vblank interrupt activity.

SYSCTL VARIABLES
If display backlight level can be controlled by the GPU (which is often the case in notebooks), the sysctl hw.backlight_level can be used to adjust the backlight level. Permitted values are from 0 to the value of hw.backlight_max.

SEE ALSO
drm(4), syscons(4)

HISTORY
The i915 driver was first available for Linux.