[Nouveau] [Bug 51157] New: GeForce GT 540M not working anymore

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=51157

             Bug #: 51157
           Summary: GeForce GT 540M not working anymore
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: aiguo.fernandez at gmail.com
         QAContact: xorg-team at lists.x.org


Created attachment 63117
  --> https://bugs.freedesktop.org/attachment.cgi?id=63117
dmesg from kernel 3.4

I have a Sager NP5160 with Nvidia GeForce GT 540M Optimus card and running Arch
Linux.

Bumblebee was working fine with previous kernels, but it stopped working since
around kernel 3.1.  I tried solving this with the Bumblebee team at
https://github.com/Bumblebee-Project/Bumblebee/issues/156 but no luck.  I'm
thinking it may be something with the DRM module in the kernel.

Fortunately, it still works with the current LTS kernel in Arch (3.0.34) which
may help get some insight.  I'm attaching my dmesg from both the lts kernel and
from the current kernel (3.4.2).  I'm also attaching my vbios.rom from
/sys/kernel/debug/dri/0/vbios.rom

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