[Bug 241685] graphics/drm-fbsd12.0-kmod in some cases makes X unusable

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241685

--- Comment #10 from Jan Beich <jbeich at FreeBSD.org> ---
Does disabling framebuffer compression help? Add either
compat.linuxkpi.enable_fbc=0 or compat.linuxkpi.i915_enable_fbc=0 to
/boot/loader.conf then reboot (or reload i915kms).
Does replacing TearFree with compton-yshui (aka picom) with --backend glx and
--vsync help? Add --use-damage to improve performance.

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