[Bug 73567] [915 Haswell ULT Asus UX302LA/LG] eDP bpp clamping results in blank screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73567

--- Comment #36 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to comment #35)
> I notice that the bug hasn't been updated in a while, a patch that fixes the
> issue exists and can be integrated in the same way as bug 71049 (quirk-based
> bpp clamping bypass).

The fix for bug 71049 is specifically *not* quirk based. 

> Can this patch be reviewed & integrated so that we can consider the issue
> fixed with this laptop and move on ?

Adding quirks instead of finding the root cause is problematic in a few ways.

Only the users of a specific laptop can "move on". There will be others, and
there will be no end to it. It's not likely that only a very specific machine
would suffer from this. We wouldn't be able to move on.

Working around this on a quirk by quirk basis as the bug reports slowly come
in, from a very select group of people, for a very limited selection of
machines, is actually counterproductive to making the driver work properly for
everybody.

With the quirks in, it's also quite hard to revert those and try to switch to a
real fix when one is found. The quirked machines must not regress, but at the
same time it's difficult to get testing feedback from the original reporters.

Thanks for your understanding and patience.

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