[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         QA Contact|                            |xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
            Product|DRI                         |xorg
           Assignee|dri-devel-PD4FTy7X32lNgt0PjOBp93gSJqDPrsil@public.gmane.org |nouveau-PD4FTy7X32lNgt0PjOBp93rCq3LdnpKM@public.gmane.org
                   |.org                        |rg
          Component|DRM/other                   |Driver/nouveau

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

--- Comment #8 from Ben Skeggs <skeggsb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I investigated an issue a while back that I believe is likely the same as what
you're experiencing.  I'm, unfortunately, not able to reproduce properly (long
story) on any hardware I own.

I've identified a few issues that could result in what you're seeing, however,
I have no idea why they've suddenly become a problem in 4.11.  There doesn't
seem to be an obvious commit that's the culprit here, so I can't be sure any of
the issues I found will actually resolve the problem.

If you would you be able to bisect between 4.10 and 4.11, and determine the
exact commit where this starts happening, that'd be a big help.  It's
potentially not even a nouveau commit that's triggered this.

Thanks,
Ben.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

--- Comment #9 from wilrikerDE+freedesktop-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org ---
I have the same issue on an Asus PL80Jt which has the same Nvidia Chip built
in. Using modprobe.blacklist=nouveau let's me but just fine (except that PRIME
won't be enabled and the card will not be disabled by vgaswitcheroo). Otherwise
I experience what has been described here.

I compiled kernel 4.12-rc6 this morning and it boots fine again. So this will
be fixed in 4.12. My machine is too slow to do a bisect (kernel compiles
several hours) so I cannot provide you with the information what broke it
originally.

Best regards
Manuel

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

--- Comment #10 from Ben Steel <bhs_suse-cB/ihCqopeGiRCDHeDlHb1HQbgUU0Jf+@public.gmane.org> ---
Thank you Mr. Coenen. I agree. Kernel 4.12.0-rc6 does not exhibit the problem
on a Lenovo T510 either.
Between a fix already in the pipeline and a modeset workaround in the meantime,
I'm happy. Does anyone still need the bisection completed?

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

Ben Steel <bhs_suse-cB/ihCqopeGiRCDHeDlHb1HQbgUU0Jf+@public.gmane.org> changed:

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

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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--- Comment #11 from Ben Skeggs <skeggsb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Ben Steel from comment #10)
> Thank you Mr. Coenen. I agree. Kernel 4.12.0-rc6 does not exhibit the
> problem on a Lenovo T510 either.
> Between a fix already in the pipeline and a modeset workaround in the
> meantime, I'm happy. Does anyone still need the bisection completed?

I, personally, wouldn't mind knowing what the cause was exactly, and what fixed
it.  It could be important down the line if it ever reappears.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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--- Comment #12 from Ben Steel <bhs_suse-cB/ihCqopeGiRCDHeDlHb1HQbgUU0Jf+@public.gmane.org> ---
Yikes. I only waited about 28 hours before completely restoring that machine
from backup and putting it back in service. Food for thought: my greatest fear
is that the problem may have been illuminated by the change to GCC 7, which
doesn't like compiling 4.10 kernels.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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Daniel Otero <otero.o.daniel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=101587

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         QA Contact|                            |xorg-team@lists.x.org
            Product|DRI                         |xorg
           Assignee|dri-devel@lists.freedesktop |nouveau@lists.freedesktop.o
                   |.org                        |rg
          Component|DRM/other                   |Driver/nouveau

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

--- Comment #7 from Ilia Mirkin <imirkin@alum.mit.edu> ---
Interesting. Dies in PMU preinit somewhere, which in turn calls nkvm_pmu_reset.
I don't see an obvious reason for that to die except ... if PTIMER is somehow
off?

The only difference is from 1e2115d8c0c0da62405400316f5499d909e479bc which
makes it so that nvkm_falcon_v1_new is now being called, although I can't
imagine what would go wrong there.

This will require someone who knows what they're doing to figure out ... i.e.
not me. Hopefully Ben can take a look.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

--- Comment #6 from Ben Steel <bhs_suse@precisionforesight.com> ---
Created attachment 131935
  --> https://bugs.freedesktop.org/attachment.cgi?id=131935&action=edit
dmesg with debug=trace

Thanks for your efforts. Boot with patched driver unsuccessful. Dmesg from
rmmod and insmod with debug trace attached. Thanks also to Takashi Iwai for the
build of the patched kernel.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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--- Comment #5 from Ilia Mirkin <imirkin@alum.mit.edu> ---
Can you see if this patch helps any?

https://github.com/skeggsb/linux/commit/a7cb78bab3671dbad08e5b2f5fd83a6dbda90fe5

If not, please boot with nouveau.debug=trace as well.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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--- Comment #4 from Ben Steel <bhs_suse@precisionforesight.com> ---
Created attachment 131881
  --> https://bugs.freedesktop.org/attachment.cgi?id=131881&action=edit
dmesg after rmmod and insmod of nouveau

Tried the command 
  sudo rmmod -v nouveau 
followed by
  sudo insmod
/lib/modules/4.11.3-1-default/kernel/drivers/gpu/drm/nouveau/nouveau.ko 

X was not running and I was on console. In each case stdout and stderr were
redirected, but results were zero-length, so omitted for clarity.
Results of insmod:
Visibly, the four dmesg items from 1763.415095 to 1763.417364 were shown, the
dispay froze up and the fan turned on, blowing very warm air. SSH was very
slow, taking around a minute to get a prompt. Each command typed could take a
similar amount of time. A shutdown command was never able to complete. Dmesg
output during the ssh session after insmod is attached. Hope this helps.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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--- Comment #3 from Ilia Mirkin <imirkin@alum.mit.edu> ---
OK, so after booting with nouveau.modeset=0, rmmod nouveau, and reinsert it
without that option. As your system should be fully up, you should get the
relevant info of what fails.

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--- Comment #2 from Ben Steel <bhs_suse@precisionforesight.com> ---
Thanks for the prompt response.

nouveau.modeset=0 allows it to successfully boot all the way into the GUI.

In successful 4.10 kernel boots, nouveau console messages are present. In
unsuccessful 4.11 boots with console logging, the console messages would stop
and the screen would experience bad scrolling (redraw problems) at
unpredictable points in the list but never mentioning nouveau. I know that it
didn't complete booting without the screen because the ssh daemon never came
up, dashing my hopes for better logging.

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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--- Comment #1 from Ilia Mirkin <imirkin@alum.mit.edu> ---
Any particular reason you're blaming nouveau?

>From the 4.10 log, it appears that i915 is the primary drm driver.

What does "won't boot" mean?

What happens if you specify 'nouveau.modeset=0' (which has the effect of
disabling nouveau entirely but leaving i915 as it was)?

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[Bug 101368] Nouveau regression GT218M in Kernel 4.11 Won't Boot

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https://bugs.freedesktop.org/show_bug.cgi?id=101368

            Bug ID: 101368
           Summary: Nouveau regression GT218M in Kernel 4.11 Won't Boot
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: medium
         Component: DRM/other
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bhs_suse@precisionforesight.com
                CC: tiwai@suse.de

Created attachment 131838
  --> https://bugs.freedesktop.org/attachment.cgi?id=131838&action=edit
dmesg output from the earlier 4.10 kernel showing correct functioning

Kernel 4.11.3-1 on a Lenovo Thinkpad T510 requires nomodeset to boot. Kernel
4.10.13-1 was fine. The T510 uses an NVIDIA Quadro NVS 3100M with 512MB. The OS
is OpenSUSE Tumbleweed (a semi-tested rolling release for the brave). A dmesg
from the working 4.10 kernel is attached.
Downstream bug report is bugzilla.opensuse.org #1043280.

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