https://bugs.freedesktop.org/show_bug.cgi?id=95520

--- Comment #2 from r...@wi.rr.com ---
Created attachment 127330
  --> https://bugs.freedesktop.org/attachment.cgi?id=127330&action=edit
ps -el output

Linux kernel 4.7.5
desktop  kde plasma 5
xorg-x11-server 7.6
libdrm_nouveau2  2.4.70
xf86-video-nouveau  1.0.13

System was coming out of suspend, and I typed in my password to the unlock
screen.  The mouse would move but the system locked up.  I couldn't switch to
another virtual terminal.

I remote logged in but I couldn't exit several processes including Xorg.
Many processes were waiting on 'SyS_po' or 'SyS_ep'.
I don't know if the nouveau fifo read fault error is valid as it does often.

2016-10-16T07:00:35.743887-05:00 mothra kernel: [470577.068256] nouveau
0000:01:00.0: DRM: suspending console...
2016-10-16T07:00:35.743889-05:00 mothra kernel: [470577.068260] nouveau
0000:01:00.0: DRM: suspending display...
2016-10-16T07:00:35.743890-05:00 mothra kernel: [470577.068357] nouveau
0000:01:00.0: DRM: evicting buffers...
2016-10-16T07:00:35.743893-05:00 mothra kernel: [470577.458254] nouveau
0000:01:00.0: DRM: waiting for kernel channels to go idle...
2016-10-16T07:00:35.743895-05:00 mothra kernel: [470577.458284] nouveau
0000:01:00.0: DRM: suspending client object trees...
2016-10-16T07:00:35.743896-05:00 mothra kernel: [470577.458794] nouveau
0000:01:00.0: DRM: suspending kernel object tree...
2016-10-16T07:00:35.743967-05:00 mothra kernel: [470581.707062] nouveau
0000:01:00.0: DRM: resuming kernel object tree...
2016-10-16T07:00:35.743972-05:00 mothra kernel: [470581.998697] nouveau
0000:01:00.0: DRM: resuming client object trees...
2016-10-16T07:00:35.743974-05:00 mothra kernel: [470581.999113] nouveau
0000:01:00.0: DRM: resuming display...
2016-10-16T07:00:35.743992-05:00 mothra kernel: [470582.315418] nouveau
0000:01:00.0: DRM: resuming console...
2016-10-16T07:00:35.856377-05:00 mothra kernel: [470583.307500] nouveau
0000:01:00.0: fifo: read fault at 0001234000 engine 15 [PCE0] client 01
[PCOPY0] reason 02 [PAGE_NOT_PRESENT] on channel 0 [003fe12000 DRM]
2016-10-16T07:00:35.856387-05:00 mothra kernel: [470583.307504] nouveau
0000:01:00.0: fifo: ce0 engine fault on channel 0, recovering...

(EE) [mi] EQ overflowing.  Additional events will be discarded until existing
events are processed.
(EE) 
(EE) Backtrace:
(EE) 0: /usr/bin/Xorg (xorg_backtrace+0x4a) [0x59c85a]
(EE) 1: /usr/bin/Xorg (mieqEnqueue+0x253) [0x57e1e3]
(EE) 2: /usr/bin/Xorg (QueuePointerEvents+0x52) [0x4533d2]
(EE) 3: /usr/bin/Xorg (xf86PostMotionEvent+0xb9) [0x48c079]
(EE) 4: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7fbd0fd0a000+0x53c4)
[0x7fbd0fd0f3c4]
(EE) 5: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7fbd0fd0a000+0x78b2)
[0x7fbd0fd118b2]
(EE) 6: /usr/bin/Xorg (0x400000+0x7c708) [0x47c708]
(EE) 7: /usr/bin/Xorg (0x400000+0xa1d42) [0x4a1d42]
(EE) 8: /lib64/libc.so.6 (0x7fbd1dec6000+0x34650) [0x7fbd1defa650]
(EE) 9: /lib64/libc.so.6 (ioctl+0x5) [0x7fbd1dfa76e5]
(EE) 10: /usr/lib64/libdrm.so.2 (drmIoctl+0x28) [0x7fbd1f2e9bf8]
(EE) 11: /usr/lib64/libdrm.so.2 (drmCommandWrite+0x1b) [0x7fbd1f2ec90b]
(EE) 12: /usr/lib64/libdrm_nouveau.so.2 (nouveau_bo_wait+0xc2) [0x7fbd198825b2]
(EE) 13: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (0x7fbd19a88000+0x865a)
[0x7fbd19a9065a]
(EE) 14: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x5b9f)
[0x7fbd1966cb9f]
(EE) 15: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x8280)
[0x7fbd1966f280]
(EE) 16: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x1057d)
[0x7fbd1967757d]
(EE) 17: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x8ae4)
[0x7fbd1966fae4]
(EE) 18: /usr/bin/Xorg (0x400000+0x124f13) [0x524f13]
(EE) 19: /usr/bin/Xorg (0x400000+0xd90b0) [0x4d90b0]
(EE) 20: /usr/bin/Xorg (0x400000+0xda905) [0x4da905]
(EE) 21: /usr/bin/Xorg (0x400000+0x3a7af) [0x43a7af]
(EE) 22: /usr/bin/Xorg (0x400000+0x3e7b3) [0x43e7b3]
(EE) 23: /lib64/libc.so.6 (__libc_start_main+0xf1) [0x7fbd1dee6291]
(EE) 24: /usr/bin/Xorg (_start+0x29) [0x428759]
(EE) 
(EE) [mi] These backtraces from mieqEnqueue may point to a culprit higher up
the stack.
(EE) [mi] mieq is *NOT* the cause.  It is a victim.
(EE) [mi] EQ overflow continuing.  100 events have been dropped.
(EE) 
(EE) Backtrace:
(EE) 0: /usr/bin/Xorg (xorg_backtrace+0x4a) [0x59c85a]
(EE) 1: /usr/bin/Xorg (QueuePointerEvents+0x52) [0x4533d2]
(EE) 2: /usr/bin/Xorg (xf86PostMotionEvent+0xb9) [0x48c079]
(EE) 3: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7fbd0fd0a000+0x53c4)
[0x7fbd0fd0f3c4]
(EE) 4: /usr/lib64/xorg/modules/input/synaptics_drv.so (0x7fbd0fd0a000+0x78b2)
[0x7fbd0fd118b2]
(EE) 5: /usr/bin/Xorg (0x400000+0x7c708) [0x47c708]
(EE) 6: /usr/bin/Xorg (0x400000+0xa1d42) [0x4a1d42]
(EE) 7: /lib64/libc.so.6 (0x7fbd1dec6000+0x34650) [0x7fbd1defa650]
(EE) 8: /lib64/libc.so.6 (ioctl+0x5) [0x7fbd1dfa76e5]
(EE) 9: /usr/lib64/libdrm.so.2 (drmIoctl+0x28) [0x7fbd1f2e9bf8]
(EE) 10: /usr/lib64/libdrm.so.2 (drmCommandWrite+0x1b) [0x7fbd1f2ec90b]
(EE) 11: /usr/lib64/libdrm_nouveau.so.2 (nouveau_bo_wait+0xc2) [0x7fbd198825b2]
(EE) 12: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (0x7fbd19a88000+0x865a)
[0x7fbd19a9065a]
(EE) 13: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x5b9f)
[0x7fbd1966cb9f]
(EE) 14: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x8280)
[0x7fbd1966f280]
(EE) 15: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x1057d)
[0x7fbd1967757d]
(EE) 16: /usr/lib64/xorg/modules/libexa.so (0x7fbd19667000+0x8ae4)
[0x7fbd1966fae4]
(EE) 17: /usr/bin/Xorg (0x400000+0x124f13) [0x524f13]
(EE) 18: /usr/bin/Xorg (0x400000+0xd90b0) [0x4d90b0]
(EE) 19: /usr/bin/Xorg (0x400000+0xda905) [0x4da905]
(EE) 20: /usr/bin/Xorg (0x400000+0x3a7af) [0x43a7af]
(EE) 21: /usr/bin/Xorg (0x400000+0x3e7b3) [0x43e7b3]
(EE) 22: /lib64/libc.so.6 (__libc_start_main+0xf1) [0x7fbd1dee6291]
(EE) 23: /usr/bin/Xorg (_start+0x29) [0x428759]
(EE)

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