[Nouveau] [Bug 70972] New: Nouveau fails with broken screen on nv40 with kernel 3.12

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70972

          Priority: medium
            Bug ID: 70972
          Assignee: nouveau at lists.freedesktop.org
           Summary: Nouveau fails with broken screen on nv40 with kernel
                    3.12
        QA Contact: xorg-team at lists.x.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: larry.finger at lwfinger.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 88259
  --> https://bugs.freedesktop.org/attachment.cgi?id=88259&action=edit
Output of dmesg

With nouveau on the graphics adapter on an HP dv2815nr laptop, both console and
X displays show an incorrect scan length with a resulting garbled screen.

The 'lspci -nnv' for this adapter is

00:12.0 VGA compatible controller [0300]: NVIDIA Corporation C67 [GeForce 7150M
/ nForce 630M] [10de:0531] (rev a2) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Device [103c:30d6]
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
        Memory at f4000000 (32-bit, non-prefetchable) [size=16M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Memory at f0000000 (64-bit, non-prefetchable) [size=16M]
        [virtual] Expansion ROM at c0000000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel modules: nouveau

This device has never worked with nouveau on any kernel. I am trying to make it
work now as the nv driver is failing in certain cases, and fbdev cannot use the
optimum resolution (1600 x 800) for this laptop.

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