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From: Mihai Moldovan <ionic@ionic.de>
To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: LKML <linux-kernel@vger.kernel.org>,
	David Woodhouse <dwmw2@infradead.org>,
	intel-gfx <intel-gfx@lists.freedesktop.org>,
	dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: i915-related and general system freezes with specific kernel config // IOMMU
Date: Sun, 20 Jan 2013 22:52:49 +0100	[thread overview]
Message-ID: <50FC6731.3020209@ionic.de> (raw)
In-Reply-To: <CAKMK7uExHc=PEBpn2vPrX+sQcv=U7VuvsJHRxc-SSOh=_G_1Dg@mail.gmail.com>

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Hi Daniel,

the patch does work, i.e., it turns off DMAR for the graphics card and
alleviates the freezes when loading i915/kms.

However, still seeing random machine freezes with it (being consistent with the
behavior I've experienced with intel_iommu=igfx_off).

The patch + forcing RWBF is working, too. Interestingly, this version didn't
randomly freeze yet, after more than 5 hours of uptime! I'll leave the box
running until tomorrow to make sure I did stick around long enough.

All those tested kernels were able to handle USB and PCI(e) devices.

I still have to test turning off IOMMU in general and Intel IOMMU specifically.
Will probably do this tomorrow.

Thank you so far! :)



Mihai






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  parent reply	other threads:[~2013-01-20 21:52 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-18 23:48 i915-related and general system freezes with specific kernel config // IOMMU Mihai Moldovan
2013-01-18 23:59 ` Mihai Moldovan
2013-01-19 13:27 ` Daniel Vetter
2013-01-19 16:13   ` Mihai Moldovan
2013-01-19 16:25     ` Daniel Vetter
2013-01-19 16:26     ` Mihai Moldovan
2013-01-19 16:30       ` Daniel Vetter
2013-01-19 16:30         ` Daniel Vetter
2013-01-20 21:52   ` Mihai Moldovan [this message]
2013-01-20 22:49     ` Daniel Vetter
2013-01-21 18:11       ` Mihai Moldovan
2013-01-22 18:15         ` Mihai Moldovan
2013-01-22 18:15           ` Mihai Moldovan
2013-01-22 18:52           ` Daniel Vetter

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