Op 19-11-15 om 10:05 schreef Jani Nikula: > On Thu, 19 Nov 2015, Jani Nikula <jani.nikula@xxxxxxxxx> wrote: >> This reverts >> >> commit 6764e9f8724f1231b4deac53b9a82286ac0830e7 >> Author: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> >> Date: Thu Aug 27 15:44:06 2015 +0200 >> >> drm/i915: skip modeset if compatible for everyone. >> >> Bring back the i915.fastboot module parameter, disabled by default, due >> to backlight regression on Chromebook Pixel 2015. >> >> Apparently the firmware of the Chromebook in question enables the panel >> but disables backlight to avoid a brief garbage scanout upon loading the >> kernel/module. With fastboot, we leave the backlight untouched, in this >> case disabled. The user would have to do a modeset (i.e. not just crank >> up the brightness) to enable the backlight. >> >> There is no clean fix readily available, so get back to the drawing >> board by reverting. >> >> [N.B. The reference below is for when the thread was included on public >> lists, and some of the context had already been dropped by then.] >> >> Reported-and-tested-by: Olof Johansson <olof@xxxxxxxxx> >> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> >> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> >> References: http://marc.info/?i=CAKMK7uES7xk05ki92oeX6gmvZWAh9f2vL7yz=6T+fGK9J3X7cQ@xxxxxxxxxxxxxx >> Fixes: 6764e9f8724f ("drm/i915: skip modeset if compatible for everyone.") >> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> > Pushed to drm-intel-fixes with IRC acks from Daniel and Maarten (*). I > took the liberty of adding Tested-by from Olof, as he reported reverting > the bad commit fixes the issue for him, and it's a clean revert. > I want to enable fast modeset again in the future, but that depends on chromebook pixel being fixed. How do you want to handle fixing up the backlight on this machine? _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
