Comment 2 for bug 1042903

I have added a Bugzilla at kernel.org and here is the bugzilla details.

*Bug 46591* <https://bugzilla.kernel.org/show_bug.cgi?id=46591> - Matrox
g200 driver mgag200 hangs on HP ProLiant Gen8 Platform (edit
<https://bugzilla.kernel.org/post_bug.cgi#>)

On 08/28/2012 02:28 PM, Leann Ogasawara wrote:
> After an extensive series of tests, we've determined that the following
> kernel config change is the root cause of the issue:
>
> commit 682f607fd4a57d273db9ecc360589a8fa9cec8e6
> Author: Andy Whitcroft <email address hidden>
> Date: Fri Jul 20 21:33:43 2012 +0100
>
> UBUNTU: [Config] Enable CONFIG_DRM_AST/_CIRRUS_QEMU/_MGAG200
>
> The above config change enabled the mgag200 driver which is described as
> follows:
>
> config DRM_MGAG200
> tristate "Kernel modesetting driver for MGA G200 server engines"
> depends on DRM && PCI && EXPERIMENTAL
> select FB_SYS_FILLRECT
> select FB_SYS_COPYAREA
> select FB_SYS_IMAGEBLIT
> select DRM_KMS_HELPER
> select DRM_TTM
> help
> This is a KMS driver for the MGA G200 server chips, it
> does not support the original MGA G200 or any of the desktop
> chips. It requires 0.3.0 of the modesetting userspace driver,
> and a version of mga driver that will fail on KMS enabled
> devices.
>
> This driver is marked as EXPERIMENTAL. Our default config policy is to
> enable device specific experimental options to promote testing and
> feedback. However, should any experimental option produce adverse
> affects, we will disable them. As such, I've built a test kernel with
> CONFIG_DRM_MGAG200 disabled and we have confirmed this resolves the
> issue [1]. I've committed this change to the Quantal kernel git
> repository. It should be included in the subsequent 3.5.0-13.14 or newer
> upload. This however may unfortunately not land in time for the Quantal
> Beta-1 release. However, it will land well in advance of 12.10 being
> final. A temporary workaround aside from running the test kernel [1] is
> to blacklist the mgag200 driver.
>
> [1] http://people.canonical.com/~ogasawara/lp1039178/
>
> ** Project changed: linux => linux (Ubuntu)
>
> ** Changed in: linux (Ubuntu)
> Status: In Progress => Fix Committed
>

--
Thanks and Regards,
Narinder Gupta (PMP) <email address hidden>
Technical Account Manager
Canonical, Ltd. narindergupta [irc.freenode.net]
+1.281.736.5150 narindergupta2007[skype]

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