The Google Pixel Slate/Nocturne device uses a DPCD backlight which requires Aux Backlight Control to be enabled. This is enabled in the ChromeOS kernel trees via disabling the PWM_PIN check and also an extended heuristic, which was upstreamed in 2017, but reverted shortly thereafter due to a regression on a Thinkpad X1 Carbon 4th Gen as per https://bugs.freedesktop.org/show_bug.cgi?id=101619 I'm hoping that there is a way to remove that check and not cause problems for other machines, as otherwise the backlight is nonfunctional for nocturne, (and possibly for other related machines such as the eve Pixelbook as well.) Satadru Pramanik (1): Remove DPCD Aux Backlight Control PWM_PIN check drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) -- 2.27.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
