Nouveau - Jul 2016 - [Bug 96876] New: system freeze "fifo: gr engine fault on channel 6" NVIDIA

https://bugs.freedesktop.org/show_bug.cgi?id=96876

            Bug ID: 96876
           Summary: system freeze "fifo: gr engine fault on channel 6"
                    NVIDIA
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: dashesy at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 124976
  --> https://bugs.freedesktop.org/attachment.cgi?id=124976&action=edit
acpidump

I saw some similarity with bug #93629, but this is not related to any
SCHED_ERROR. Also it is very often, usually chrome triggering it. 
I had problem with this GC, turning off the monitors on startup, but that
problem is now fixed in the latest kernel.

$ journalctl --no-pager -b -2 -p err
-- Logs begin at Thu 2016-05-05 05:39:48 PDT, end at Sat 2016-07-09 16:10:13
PDT. --
Jul 04 02:15:01 dashesy.wavelet kernel: nouveau 0000:01:00.0: priv: HUB0:
086014 ffffffff (1f70820c)
Jul 04 09:15:32 dashesy.wavelet mcelog[877]: Family 6 Model 5e CPU: only
decoding architectural errors
Jul 04 09:15:33 dashesy.wavelet bluetoothd[873]: Failed to obtain handles for
"Service Changed" characteristic
Jul 04 09:16:01 dashesy.wavelet spice-vdagent[1546]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jul 04 09:17:36 dashesy.wavelet spice-vdagent[2064]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jul 04 12:24:41 dashesy.wavelet kernel: nouveau 0000:01:00.0: Invalid PCI ROM
header signature: expecting 0xaa55, got 0xffff
Jul 09 09:59:48 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: read fault
at 0000260000 engine 00 [GR] client 01 [GPC0/T1_0] reason 02 [PTE] on channel 6
[007fb61000 systemd-logind[859]]
Jul 09 09:59:48 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: gr engine
fault on channel 6, recovering...
Jul 09 09:59:48 dashesy.wavelet kernel: nouveau 0000:01:00.0: gr: TRAP ch 6
[007fb61000 systemd-logind[859]]
Jul 09 09:59:48 dashesy.wavelet kernel: nouveau 0000:01:00.0: gr:
GPC0/TPC0/TEX: 80000049
Jul 09 09:59:48 dashesy.wavelet kernel: nouveau 0000:01:00.0: gr:
GPC0/TPC1/TEX: 80000049


$ lspci -v
01:00.0 VGA compatible controller: NVIDIA Corporation GK208 [GeForce GT 730]
(rev a1) (prog-if 00 [VGA controller])
        Subsystem: Dell Device 1083
        Flags: bus master, fast devsel, latency 0, IRQ 126
        Memory at de000000 (32-bit, non-prefetchable) [size=16M]
        Memory at d0000000 (64-bit, prefetchable) [size=128M]
        Memory at d8000000 (64-bit, prefetchable) [size=32M]
        I/O ports at e000 [size=128]
        Expansion ROM at df000000 [disabled] [size=512K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Legacy Endpoint, MSI 00
        Capabilities: [100] Virtual Channel
        Capabilities: [128] Power Budgeting <?>
        Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024
<?>
        Kernel driver in use: nouveau
        Kernel modules: nouveau

$ uname -a
Linux dashesy.wavelet 4.5.7-202.fc23.x86_64 #1 SMP Tue Jun 28 18:22:51 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux


This is a complete hang, and seems to happen quite enough, I will gladly run
any kernel/driver combination to sort this out.

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Could you include a full dmesg? Also are you using modesetting or nouveau ddx?
If modesetting, please switch to nouveau.

Also, kernel 4.6 received a number of "various" fixes which could
affect your
situation. Or they might not, unfortunately it's incredibly hard to
diagnose,
but it's definitely an easy thing to try.

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--- Comment #2 from Ehsan Azar <dashesy at gmail.com> ---
I use vanilla Fedora 23 with nouveau. Thanks, will try 4.6 from rawhide.

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--- Comment #3 from Ehsan Azar <dashesy at gmail.com> ---
Created attachment 124977
  --> https://bugs.freedesktop.org/attachment.cgi?id=124977&action=edit
dmesg

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--- Comment #4 from Ehsan Azar <dashesy at gmail.com> ---
I finally have time today to try new kernel. But I just got this (no freeze,
just chrome got broken) and thought might be helpful.

[  685.293359] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293368] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 128, format = 0, storage type = 0
[  685.293401] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293408] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 136, format = 0, storage type = 0
[  685.293488] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293494] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 144, format = 0, storage type = 0
[  685.293501] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293506] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 152, format = 0, storage type = 0
[  685.293521] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293526] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 160, format = 0, storage type = 0
[  685.293540] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293545] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 168, format = 0, storage type = 0
[  685.293557] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293563] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 176, format = 0, storage type = 0
[  685.293575] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293581] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 184, format = 0, storage type = 0
[  685.293594] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293620] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 192, format = 0, storage type = 0
[  685.293638] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293645] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 208, format = 0, storage type = 0
[  685.293660] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293666] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 216, format = 0, storage type = 0
[  685.293701] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293707] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 224, format = 0, storage type = 0
[  685.293720] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293726] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 232, format = 0, storage type = 0
[  685.293735] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293741] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 240, format = 0, storage type = 0
[  685.293753] nouveau 0000:01:00.0: gr: TRAP ch 6 [007fb61000
systemd-logind[904]]
[  685.293758] nouveau 0000:01:00.0: gr: GPC0/PROP trap: 00000200 [] x = 896, y
= 248, format = 0, storage type = 0
[127998.748786] perf interrupt took too long (2501 > 2500), lowering
kernel.perf_event_max_sample_rate to 50000

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--- Comment #5 from Ehsan Azar <dashesy at gmail.com> ---
Ok I am now running:

$ uname -a
Linux dashesy.wavelet 4.6.4-301.fc24.x86_64 #1 SMP Tue Jul 12 11:50:00 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux


Is this latest enough?
I am waiting to see if lockup happens again, but I am afraid I still see the
same kind of precursor:

$ journalctl --no-pager -b -p err
-- Logs begin at Thu 2016-05-05 05:39:48 PDT, end at Sat 2016-07-23 10:26:44
PDT. --
Jul 23 03:23:01 dashesy.wavelet kernel: nouveau 0000:01:00.0: priv: HUB0:
085014 ffffffff (1a70820b)
Jul 23 10:23:12 dashesy.wavelet kernel: tpm_crb MSFT0101:00: can't request
region for resource [mem 0xfed40040-0xfed4103f]
Jul 23 10:23:13 dashesy.wavelet mcelog[865]: Family 6 Model 5e CPU: only
decoding architectural errors
Jul 23 10:23:15 dashesy.wavelet bluetoothd[869]: Failed to obtain handles for
"Service Changed" characteristic
Jul 23 10:23:41 dashesy.wavelet spice-vdagent[1493]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jul 23 10:23:56 dashesy.wavelet spice-vdagent[1985]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jul 23 10:23:58 dashesy.wavelet pulseaudio[2107]: [pulseaudio] pid.c: Daemon
already running.

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--- Comment #6 from Ehsan Azar <dashesy at gmail.com> ---
Same lockup happens with 4.6.4, should I try some newer kernel?


Jul 23 21:50:16 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: write fault
at 0000260000 engine 00 [GR] client 0f [GPC0/PROP_0] reason 02 [PTE] on channel
6 [007fb71000 systemd-logind[867]]
Jul 23 21:50:16 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: gr engine
fault on channel 6, recovering...

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

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

--- Comment #7 from Martin Peres <martin.peres at free.fr> ---
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