[Bug 91091] New: 3.19 kernels hang during boot for an NV28 based card

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=91091

            Bug ID: 91091
           Summary: 3.19 kernels hang during boot for an NV28 based card
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.19-rc3+
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: bruno at wolff.to
        Regression: Yes

Created attachment 163071
  --> https://bugzilla.kernel.org/attachment.cgi?id=163071&action=edit
dmesg output from a successful 3.18 boot

3.19 kernels having been hanging for me during boot for one of my machines. 
This is still happening as of commit dc9319f5a3e1f67d2a2fbf190e30f6d03f569fed
(post rc3). The problem first happens with commit
ad4a362635353f7ceb66f4038269770fee1025fa. I tried reverting
ad4a362635353f7ceb66f4038269770fee1025fa from
dc9319f5a3e1f67d2a2fbf190e30f6d03f569fed, but there were conflicts and I don't
know enough to properly resolve them.
The hang is early enough that I can't get logging output from the boot.
I have filed a bug at freedesktop.org for this as well:
https://bugs.freedesktop.org/show_bug.cgi?id=88262

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