From: Christoph Hellwig <hch@infradead.org>
To: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: joro@8bytes.org, Alex Deucher <alexander.deucher@amd.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems
Date: Mon, 2 Dec 2019 09:00:11 -0800 [thread overview]
Message-ID: <20191202170011.GC30032@infradead.org> (raw)
In-Reply-To: <20191129142154.29658-1-kai.heng.feng@canonical.com>
On Fri, Nov 29, 2019 at 10:21:54PM +0800, Kai-Heng Feng wrote:
> Serious screen flickering when Stoney Ridge outputs to a 4K monitor.
>
> According to Alex Deucher, IOMMU isn't enabled on Windows, so let's do
> the same here to avoid screen flickering on 4K monitor.
Disabling the IOMMU entirely seem pretty severe. Isn't it enough to
identity map the GPU device?
next prev parent reply other threads:[~2019-12-02 17:00 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 14:21 [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems Kai-Heng Feng
2019-12-01 12:42 ` Lucas Stach
2019-12-02 16:36 ` Deucher, Alexander
2019-12-04 16:08 ` Deucher, Alexander
2019-12-06 5:59 ` Kai-Heng Feng
2019-12-06 8:57 ` Christian König
2019-12-02 17:00 ` Christoph Hellwig [this message]
2019-12-06 5:57 ` Kai-Heng Feng
2019-12-17 9:53 ` Joerg Roedel
2019-12-18 17:45 ` Kai-Heng Feng
2019-12-19 19:15 ` Deucher, Alexander
2019-12-20 2:13 ` Kai-Heng Feng
2020-01-06 8:37 ` Kai-Heng Feng
2020-02-05 10:10 ` Kai-Heng Feng
2020-02-05 13:24 ` Joerg Roedel
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