From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keith Packard <keithp@keithp.com>
Subject: Re: Major 2.6.38 / 2.6.39 / 3.0 regression ignored?
Date: Fri, 22 Jul 2011 13:50:04 -0700
Message-ID: <yunsjpyrqf7.fsf@aiko.keithp.com>
References: <201105201306.31204.luke@dashjr.org> <BANLkTimOqhNEsBEg6f=nMiMJqYGNyFJmeQ@mail.gmail.com> <013811$4lfs6@fmsmga002.fm.intel.com> <201105211123.56053.luke@dashjr.org> <aefc95$1usaq@orsmga001.jf.intel.com> <20110528131920.GA10467@tugrik.mns.mnsspb.ru> <20110712171706.GA18414@tugrik.mns.mnsspb.ru> <CAOJsxLEz-fPnb9oYnLMk9UbGqgsfm-g1d2yH=TrEiEk7HvyQzA@mail.gmail.com> <20110722110806.GA29757@tugrik.mns.mnsspb.ru> <yun7h7atcty.fsf@aiko.keithp.com> <20110722202336.GA14375@tugrik.mns.mnsspb.ru>
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To: Kirill Smelkov <kirr@mns.spb.ru>
Cc: Pekka Enberg <penberg@kernel.org>, Chris Wilson <chris@chris-wilson.co.uk>, Luke-Jr <luke@dashjr.org>, intel-gfx@lists.freedesktop.org, LKML <linux-kernel@vger.kernel.org>, dri-devel@lists.freedesktop.org, "Rafael J. Wysocki" <rjw@sisk.pl>, Ray Lee <ray-lk@madrabbit.org>, Herbert Xu <herbert@gondor.apana.org.au>, Linus Torvalds <torvalds@linux-foundation.org>, Andrew Morton <akpm@linux-foundation.org>, Florian Mickler <florian@mickler.org>
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On Sat, 23 Jul 2011 00:23:36 +0400, Kirill Smelkov <kirr@mns.spb.ru> wrote:

> What kind of a workaround are you talking about?

Just reverting the commit -- that makes your machine work, even if it's
wrong for other machines.

> Sorry, to me it all looked like "UMS is being ignored forever".

You're right, of course -- UMS is a huge wart on the kernel driver at
this point, keeping it working while also adding new functionality
continues to cause challenges. We tend to expect that most people will
run reasonably contemporaneous kernel and user space code, and so three
years after the switch, it continues to surprise us when someone
actually tries UMS.

> I'm out of office till ~ next week's tuesday, and on return I'll try
> to test it on the hardware in question.

Let me know; I've pushed this patch to my drm-intel-fixes tree on
kernel.org in the meantime; if it does solve the problem, I'd like to
add your Tested-by: line.

=2D-=20
keith.packard@intel.com

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