[Nouveau] [Bug 80769] New: [NVD9] GF119M boot hang with 3.15.2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80769

          Priority: medium
            Bug ID: 80769
          Assignee: nouveau at lists.freedesktop.org
           Summary: [NVD9] GF119M boot hang with 3.15.2
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: sven.pilz+freedesktop at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 102095
  --> https://bugs.freedesktop.org/attachment.cgi?id=102095&action=edit
dmesg

Hello everybody.

I'm using a ThinkPad T420 with Optimus. Since 3.15 the boot hangs during KMS,
when I use the discrete card (GF119M [Quadro NVS 4200M]). With the Intel card
or Optimus, the system boots. Though I see those message from the kernel, also
after standby:
  nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x002140 [
!ENGINE ]

When I try to use the Nvidia card via PRIME with, the xserver crashes.

I tested the PRIME way with:
  xrandr --setprovideroffloadsink nouveau Intel
  DRI_PRIME=1 glxgears

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