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From: Keith Packard <keithp@keithp.com>
To: Andrew Lutomirski <luto@mit.edu>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: Revert i915.semaphore=1 default from 47ae63e0
Date: Tue, 24 May 2011 11:46:07 -0600
Message-ID: <yun8vtwq9eo.fsf@aiko.keithp.com> (raw)
In-Reply-To: <BANLkTim6hVTes8GJiPm4rZVxu4fy1L5CCA@mail.gmail.com>

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On Tue, 24 May 2011 13:10:27 -0400, Andrew Lutomirski <luto@mit.edu> wrote:

> I'm getting hangs on my X220 Core i7 laptop as well with 2.6.39 and
> i915.semaphores=1.  They're not as reliable -- sometimes the system
> hangs on log in, sometimes after a few seconds, and sometimes it
> doesn't hang.

That's consistent with our theory at least -- lockups caused by GPU/CPU
interactions, which occur far more often with semaphores disabled, but
still occur with semaphores enabled.

We're working on it...

-- 
keith.packard@intel.com

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Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-13  5:38 [2.6.39 regression] hard lock when GNOME starts Andrew Lutomirski
2011-05-13 16:07 ` Andrew Lutomirski
2011-05-13 16:14   ` [PATCH] drm/i915: Revert i915.semaphore=1 default from 47ae63e0 Andy Lutomirski
2011-05-15 23:09     ` Keith Packard
2011-05-19 19:56     ` Keith Packard
2011-05-19 20:50       ` Andrew Lutomirski
2011-05-24 17:10         ` Andrew Lutomirski
2011-05-24 17:46           ` Keith Packard [this message]
2011-05-24 20:05           ` Ivan Bulatovic
2011-06-07  7:12         ` Eric Anholt
2011-06-10 14:06           ` Andrew Lutomirski
2011-08-22 16:53             ` Jesse Barnes
2011-08-31 18:24               ` Ben Widawsky
2011-08-31 18:30               ` Andrew Lutomirski
2011-08-31 19:07                 ` Keith Packard
2011-08-31 19:37                   ` Andrew Lutomirski
2011-09-26 17:59                     ` [PATCH] drm/i915: kicking rings considered harmful Daniel Vetter
2011-09-26 19:07                       ` Andrew Lutomirski
2011-09-27  9:57                         ` Daniel Vetter
2011-09-27  5:22                       ` Ben Widawsky
2011-09-27 10:03                         ` Daniel Vetter
2011-09-27 16:46                           ` Ben Widawsky
2011-09-27 17:31                             ` Chris Wilson
2011-09-27 18:03                               ` Daniel Vetter
2011-09-27 19:38                                 ` Ben Widawsky
2011-09-27 21:54                                   ` Chris Wilson
2011-09-28  1:34                                     ` Ben Widawsky
2011-09-28  8:47                                       ` Chris Wilson
2011-09-28  8:53                                         ` Daniel Vetter
2011-10-03 20:21                                           ` Andrew Lutomirski
2011-10-03 21:02                                             ` Daniel Vetter

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