[Nouveau] [Bug 70208] Nouveau driver doesn't find vbios for Geforce GT 750M on Asus N750JV laptop

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70208

--- Comment #3 from Emil Velikov <emil.l.velikov at gmail.com> ---
>From the MMIO trace - the binary driver seems to be retrying in a very unusual
manner to retrieve the vbios from ACPI.
[mem 0x00000000c9e25000-0x00000000cab27fff] ACPI NVS


acpi_vbios() {
  W 0x088050 0x00000000 PPCI.ROM_SHADOW_ENABLE <= 0

  origin = 0xc9eca000;
  size = 0x1000;

  MAP $origin $size
  UNMAP

  base = origin;

  for (i = 0; i < ??; i++) {
    for (j = 0; j < 8; j++) {
      for (k = 1; k <= 8; k++) {
        MAP $base+(k*$size) $size
        UNMAP
      }
      MAP $base $size
      SLEEP 0.182000ms
      UNMAP
    }
    base += 8*$size;
  }
}

Not entirely sure if it succeeds though, but after this sequence it seems to be
doing all sorts of stupid stuff as init script tables do.
  R 0x000000 0x0e7240a2 PMC.ID
  W 0x000000 0x0e7240a2 
etc.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/nouveau/attachments/20131006/9e974cdc/attachment.html>