[Nouveau] [Bug 93629] [NVE6] complete system freeze, PGRAPH engine fault on channel 2, SCHED_ERROR [ CTXSW_TIMEOUT ]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93629

--- Comment #32 from Ehsan Azar <dashesy at gmail.com> ---
I have the same issue:
$ uname -a
Linux dashesy.wavelet 4.5.7-200.fc23.x86_64 #1 SMP Wed Jun 8 17:41:50 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux

$ lspci

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: <access denied>
        Kernel driver in use: nouveau
        Kernel modules: nouveau


I get complete system hang:
$ journalctl --no-pager -b -1 -p err
Jul 03 05:37:30 dashesy.wavelet kernel: nouveau 0000:01:00.0: priv: HUB0:
086014 ffffffff (1c70820c)
Jul 03 12:37:58 dashesy.wavelet bluetoothd[881]: Failed to obtain handles for
"Service Changed" characteristic
Jul 03 12:37:59 dashesy.wavelet mcelog[923]: Family 6 Model 5e CPU: only
decoding architectural errors
Jul 03 12:38:29 dashesy.wavelet spice-vdagent[1552]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jul 03 12:38:42 dashesy.wavelet spice-vdagent[2068]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jul 03 12:38:43 dashesy.wavelet pulseaudio[2190]: [pulseaudio] pid.c: Daemon
already running.
Jul 04 09:12:02 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: read fault
at 0000260000 engine 00 [GR] client 04 [GPC0/T1_1] reason 02 [PTE] on channel 6
[007fb61000 systemd-logind[917]]
Jul 04 09:12:02 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: gr engine
fault on channel 6, recovering...
Jul 04 09:12:02 dashesy.wavelet kernel: nouveau 0000:01:00.0: gr: TRAP ch 6
[007fb61000 systemd-logind[917]]
Jul 04 09:12:02 dashesy.wavelet kernel: nouveau 0000:01:00.0: gr:
GPC0/TPC0/TEX: 80000049
Jul 04 09:12:02 dashesy.wavelet kernel: nouveau 0000:01:00.0: gr:
GPC0/TPC1/TEX: 80000049


Here from another boot:
$ journalctl --no-pager -b -2 -p err
-- Logs begin at Thu 2016-05-05 05:39:48 PDT, end at Mon 2016-07-04 10:53:42
PDT. --
Jun 29 13:43:01 dashesy.wavelet kernel: nouveau 0000:01:00.0: priv: HUB0:
086014 ffffffff (1b70820c)
Jun 29 20:43:16 dashesy.wavelet mcelog[895]: Family 6 Model 5e CPU: only
decoding architectural errors
Jun 29 20:43:17 dashesy.wavelet bluetoothd[885]: Failed to obtain handles for
"Service Changed" characteristic
Jun 29 20:44:06 dashesy.wavelet spice-vdagent[1550]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jun 29 20:44:40 dashesy.wavelet spice-vdagent[2053]: Cannot access vdagent
virtio channel /dev/virtio-ports/com.redhat.spice.0
Jun 29 20:44:41 dashesy.wavelet pulseaudio[2181]: [pulseaudio] pid.c: Daemon
already running.
Jun 30 18:12:09 dashesy.wavelet systemd[1]: Failed to start dnf makecache.
Jul 03 08:56:52 dashesy.wavelet cinnamon-screensaver-dialog[14887]: gkr-pam:
the password for the login keyring was invalid.
Jul 03 12:35:23 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 [007fb61000 systemd-logind[939]]
Jul 03 12:35:23 dashesy.wavelet kernel: nouveau 0000:01:00.0: fifo: gr engine
fault on channel 6, recovering...
dashesy at dashesy ~


Needless to say, recovering does not help, X hangs completely.

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