[Nouveau] [Bug 87361] [NV4C] GPU lock-up after booting to desktop in Fedora 20 & 21 (Nvidia Geforce 6100 IGP)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87361

--- Comment #6 from Jan Jasper de Kroon <jajadekroon at gmail.com> ---
A quick search around the freedesktop.org bugzilla with search criteria NV4C
revealed some similar bugs like:
https://bugs.freedesktop.org/show_bug.cgi?id=61321
When I did a quick search on nv4c_mc_oclass I found on the website:
http://lxr.free-electrons.com/ident?v=3.14;i=nv4c_mc_oclass that this
nv4c_mc_oclass is first mentioned in kernel 3.14.
But if you look at the bug report I linked in this comment I found out that
this person also experienced the same problem with the transition of kernel 3.6
to 3.7.
While browsing the kernel source from 3.7 I found out that the value for
device->oclass[NVDEV_SUBDEV_MC still was nv44_mc_oclass.
When you enter this search value 'nv44_mc_oclass' in the free-electrons.com
website and you look at kernel version 3.6 and 3.7 you'll find the
nv44_mc_oclass was first introduced in kernel version 3.7 (where the above
mentioned bug report applies to).
So indeed I think you're thought to disable the MSI in the kernel source will
be the correct decision. But of course that's just my humble opinion.
As said earlier I will report this evening about the change from nv4c_mc_oclass
to nv44_mc_oclass, but given the above bug report I suppose this will
eventually lead to the same result.
Hope I have given you a lot of usefull information about this problem.

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