Nouveau - Jan 2017 - [Bug 99372] New: Nvidia 640M devinit fails

https://bugs.freedesktop.org/show_bug.cgi?id=99372

            Bug ID: 99372
           Summary: Nvidia 640M devinit fails
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: me at marcel-sander.eu
        QA Contact: xorg-team at lists.x.org

Created attachment 128904
  --> https://bugs.freedesktop.org/attachment.cgi?id=128904&action=edit
vbios.rom

I have a VAIO SVS1511C5E laptop and the nouveau driver is not working in kernel
versions > 3.16 . (3.19 does not work for me)
>From my understanding the ACPI loading of the bios rom fails. I tried other
methods as suggested in many other threads (PROM, PRAMIN), but they also fail.
ACPI loading worked in kernel 3.16.

I attach the vbios.rom copied from a booted 3.16 kernel from
/sys/kernel/debug/dri/1/vbios.rom and a dmesg log showing the error from kernel
4.10rc3.

As a workaround I am able to load nouveau manually in all kernels by providing
the copied vbios.rom as a parameter to the nouveau module.

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--- Comment #1 from ralala <me at marcel-sander.eu> ---
Created attachment 128905
  --> https://bugs.freedesktop.org/attachment.cgi?id=128905&action=edit
dmesg.log

4.10rc3

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https://bugs.freedesktop.org/show_bug.cgi?id=99372

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Please include an acpidump of your system.

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Oh, and separately, please include the dmesg of a boot of 4.10-rcN with
nouveau.debug=debug when not specifying the "fixed" vbios.rom
explicitly.

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--- Comment #4 from ralala <me at marcel-sander.eu> ---
Created attachment 128906
  --> https://bugs.freedesktop.org/attachment.cgi?id=128906&action=edit
acpidump

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ralala <me at marcel-sander.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #128905|0                           |1
        is obsolete|                            |

--- Comment #5 from ralala <me at marcel-sander.eu> ---
Created attachment 128907
  --> https://bugs.freedesktop.org/attachment.cgi?id=128907&action=edit
dmesg.log

4.10rc3

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--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
OK, so ... similar issue as before - it creates a temporary buffer sized to the
incoming argument's size, and THEN truncates the size argument. Great.... so
we
just get the first 4K back with the "fast acpi" method. However at
that point,
the checksum really oughtn't match. But I don't see the "checksum
failed"
message. So it does match? Or somehow the second bogus image increases the
score to 4? Not sure...

Method (_ROM, 2, NotSerialized)  // _ROM: Read-Only Memory
{
    Local0 = Arg0
    Local1 = Arg1
    Name (VROM, Buffer (Local1)
    {
         0x00                                             /* . */
    })
    If (Local1 > 0x1000)
    {
        Local1 = 0x1000
    }

    If (Arg0 > RVBS)
    {
        Return (VROM) /* \_SB_.PCI0.PEG0.PEGP._ROM.VROM */
    }

    Local2 = (Arg0 + Arg1)
    If (Local2 > RVBS)
    {
        Local1 = (RVBS - Local0)
    }

    If (Local0 < 0x8000)
    {
        Mid (VBS1, Local0, Local1, VROM) /* \_SB_.PCI0.PEG0.PEGP._ROM.VROM */
    }
    Else
    {
        Local0 -= 0x8000
        If (Local0 < 0x8000)
        {
            Mid (VBS2, Local0, Local1, VROM) /* \_SB_.PCI0.PEG0.PEGP._ROM.VROM
*/
        }
        Else
        {
            Local0 -= 0x8000
            If (Local0 < 0x8000)
            {
                Mid (VBS3, Local0, Local1, VROM) /*
\_SB_.PCI0.PEG0.PEGP._ROM.VROM */
            }
            Else
            {
                Local0 -= 0x8000
                If (Local0 < 0x8000)
                {
                    Mid (VBS4, Local0, Local1, VROM) /*
\_SB_.PCI0.PEG0.PEGP._ROM.VROM */
                }
            }
        }
    }

    Return (VROM) /* \_SB_.PCI0.PEG0.PEGP._ROM.VROM */
}

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--- Comment #7 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Looking through the code, the checksum must be passing. This is surprising.

(a) The returned data is not all 0's, e.g. the bios version is there, etc.
[All
0's *would* pass the checksum test.]
(b) The checksum fails for the first 0x1000 bytes being returned.

Something even more nefarious must be going on...

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Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #8 from Martin Peres <martin.peres at free.fr> ---
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