Hi, As discussed in the past, the i915 opregion code does not do the right thing wrt the CADL field when there are more then 8 outputs, this is causing issues on many different types of Asus laptops.
This thread has details and a number of attempts to fix this: https://lkml.org/lkml/2014/2/11/1032 This is impacting many users, here is an incomplete list of bug reports: https://bugzilla.kernel.org/show_bug.cgi?id=70241 https://bugzilla.kernel.org/show_bug.cgi?id=88941 https://bugzilla.redhat.com/show_bug.cgi?id=1144866 https://bugzilla.redhat.com/show_bug.cgi?id=1277785 And I'm pretty sure that is just the tip of the iceberg, some users have even analyzed their BIOS AML code and come up with an AML hack in an attempt to fix this: http://blog.yjwong.name/fixing-display-backlight-hotkeys-on-asus-n550jk/ It would be really great of someone from Intel could step up and start working on a proper fix for this. Regards, Hans _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
