linux-kernel - Re: [Nouveau] 4.16-rc1: UBSAN warning in nouveau/nvkm/subdev/therm/base.c + oops in nvkm_therm_clkgate

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Message-ID: <CAKb7Uvj3MKGzNNcrc=-JA5GN4jt9+TU7ZjWDZpccmYJLDo76WQ@mail.gmail.com>
Date:   Wed, 14 Feb 2018 09:35:04 -0500
From:   Ilia Mirkin <imirkin@...m.mit.edu>
To:     Meelis Roos <mroos@...ux.ee>
Cc:     nouveau <nouveau@...ts.freedesktop.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Ben Skeggs <bskeggs@...hat.com>,
        Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [Nouveau] 4.16-rc1: UBSAN warning in nouveau/nvkm/subdev/therm/base.c
 + oops in nvkm_therm_clkgate_fini

On Wed, Feb 14, 2018 at 9:29 AM, Meelis Roos <mroos@...ux.ee> wrote:
>> This is 4.16-rc1+todays git on a lowly P4 with NV5, worked fine in 4.15:
>
> NV5 in another PC (secondary card in x86-64) made the systrem crash on
> boot, in nvkm_therm_clkgate_fini.

Mind booting with nouveau.debug=trace? That should hopefully tell us
more exactly which thing is dying. If you have a cross-compile/distcc
setup handy, a bisect may be even more useful.

It's funny, I had a NV5 plugged into my desktop for testing, and
*just* took it out (because the box wouldn't even get to BIOS anymore
... although it was unrelated to the NV5, probably just something
mis-seated.)

  -ilia