Nouveau - Jul 2014 - [Bug 80769] New: [NVD9] GF119M boot hang with 3.15.2

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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--- Comment #1 from sven <sven.pilz+freedesktop at gmail.com> ---
Created attachment 102096
  --> https://bugs.freedesktop.org/attachment.cgi?id=102096&action=edit
xorg log

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--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
The xorg backtrace has intel_drv.so in it. What makes you say this is a nouveau
bug?

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--- Comment #3 from sven <sven.pilz+freedesktop at gmail.com> ---
(In reply to comment #2)
> The xorg backtrace has intel_drv.so in it. What makes you say this is a
> nouveau bug?
I don't know if nouveau crashes the xserver. Should have stated that more
clearly, sorry. This may be more a symptom that started to appear with the boot
hangs and the error messages from the kernel driver.

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--- Comment #4 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #3)
> (In reply to comment #2)
> > The xorg backtrace has intel_drv.so in it. What makes you say this is
a
> > nouveau bug?
> 
> I don't know if nouveau crashes the xserver. Should have stated that
more
> clearly, sorry. This may be more a symptom that started to appear with the
> boot hangs and the error messages from the kernel driver.
Ah. So the dmesg is from a perfectly-fine boot, yes? (Other than the error
messages, which are probably not a big deal.)

Can you bisect the boot hang? (Or at least get a dmesg from it, e.g. with
netconsole)

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--- Comment #5 from sven <sven.pilz+freedesktop at gmail.com> ---
(In reply to comment #4)
> (In reply to comment #3)
> > (In reply to comment #2)
> > > The xorg backtrace has intel_drv.so in it. What makes you say
this is a
> > > nouveau bug?
> > 
> > I don't know if nouveau crashes the xserver. Should have stated
that more
> > clearly, sorry. This may be more a symptom that started to appear with
the
> > boot hangs and the error messages from the kernel driver.
> 
> Ah. So the dmesg is from a perfectly-fine boot, yes? (Other than the error
> messages, which are probably not a big deal.)
Yes.

> Can you bisect the boot hang? (Or at least get a dmesg from it, e.g. with
> netconsole)
I now tried a couple of boots in a row and one of them actually succeeded (with
glxgears and own OpenGL applications). But the other times it got stuck during
boot, though not always before the switch to native resolution. One hanged with
some systemd error (rfkill stuff). I will try to get more information. But it
looks like there may be a couple of problems or everything is just a symptom of
some deeper one. Which still is strange is that the symptoms disappear when I
switch to the Intel card or Optimus in the BIOS. Maybe some ACPI problems and
nothing directly related to nouveau.

Sorry for bothering you with that :-). I guess you should close the bug and if
I find something related to nouveau I'll open a new one.

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--- Comment #6 from sven <sven.pilz+freedesktop at gmail.com> ---
(In reply to comment #2)
> The xorg backtrace has intel_drv.so in it. What makes you say this is a
> nouveau bug?
The bug (DRI_PRIME=1 ...) was indeed to the Intel driver (see Bug #80001) and
is fixed in version 2.99.914.

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

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

--- Comment #7 from Ilia Mirkin <imirkin at alum.mit.edu>
---
>From the latest comments, doesn't sound like there was any nouveau issue
at all
in the first place.

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