https://bugs.freedesktop.org/show_bug.cgi?id=96737

--- Comment #17 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
DRM: GPU lockup ...

= HW:
G98

= SW:
Linux 4.8.2
libdrm 2.4.71
X.Org X Server 1.18.4
lightdm 1.20.0
lightdm-gtk-greeter 2.0.2
xfce4-session 4.12.1-20160822git7c13689
xfwm4 4.12.3-20160823git2b08627

This is so far the worst outcome using nouveau,
after this system is practically unusable as Desktop,
hardware reset is required after the first Log Out.

= dmesg:
nouveau 0000:02:00.0: disp: ERROR 5 [INVALID_STATE] 0b [] chid 1 mthd 0080 data
00000000
nouveau 0000:02:00.0: disp: Base 1:
nouveau 0000:02:00.0: disp:     0084: 00000000              
nouveau 0000:02:00.0: disp:     0088: 00000000              
nouveau 0000:02:00.0: disp:     008c: 00000000              
nouveau 0000:02:00.0: disp:     0090: 00000000              
nouveau 0000:02:00.0: disp:     0094: 00000000 -> f0000000
nouveau 0000:02:00.0: disp:     00a0: 00000000              
nouveau 0000:02:00.0: disp:     00a4: 00000000              
nouveau 0000:02:00.0: disp:     00c0: 00000000 -> ffff0000
nouveau 0000:02:00.0: disp:     00c4: 00000000              
nouveau 0000:02:00.0: disp:     00c8: 00000000              
nouveau 0000:02:00.0: disp:     00cc: 00000000              
nouveau 0000:02:00.0: disp:     00e0: 40000000              
nouveau 0000:02:00.0: disp:     00e4: 00000000              
nouveau 0000:02:00.0: disp:     00e8: 00000000              
nouveau 0000:02:00.0: disp:     00ec: 00000000              
nouveau 0000:02:00.0: disp:     00fc: 00000000              
nouveau 0000:02:00.0: disp:     0100: fffe0000              
nouveau 0000:02:00.0: disp:     0104: 00000000              
nouveau 0000:02:00.0: disp:     0110: 00000000              
nouveau 0000:02:00.0: disp:     0114: 00000000              
nouveau 0000:02:00.0: disp: Base 1 - Image 0:
nouveau 0000:02:00.0: disp:     0800: 0002e200 -> 00000500
nouveau 0000:02:00.0: disp:     0804: 00000000              
nouveau 0000:02:00.0: disp:     0808: 04380780 -> 03000400
nouveau 0000:02:00.0: disp:     080c: 00007804 -> 00100800
nouveau 0000:02:00.0: disp:     0810: 0000cf00 -> 0000e800
nouveau 0000:02:00.0: disp: Base 1 - Image 1:
nouveau 0000:02:00.0: disp:     0c00: 0002e200 -> 00000500
nouveau 0000:02:00.0: disp:     0c04: 00000000              
nouveau 0000:02:00.0: disp:     0c08: 04380780 -> 03000400
nouveau 0000:02:00.0: disp:     0c0c: 00007804 -> 00100800
nouveau 0000:02:00.0: disp:     0c10: 0000cf00 -> 0000e800
nouveau: evo channel stalled
nouveau 0000:02:00.0: DRM: GPU lockup - switching to software fbcon


= Xorg.log:
(EE) [mi] EQ overflowing.  Additional events will be discarded until existing
events are processed.
(EE) 
(EE) Backtrace:
(EE) 0: /usr/libexec/Xorg (mieqEnqueue+0x253) [0x57cd33]
(EE) 1: /usr/libexec/Xorg (QueueKeyboardEvents+0x52) [0x44f2c2]
(EE) 2: /usr/libexec/Xorg (xf86PostKeyboardEvent+0x3b) [0x488a8b]
(EE) 3: /usr/lib64/xorg/modules/input/evdev_drv.so (_init+0x2fb0)
[0x7fe3135e4a20]
(EE) 4: /usr/lib64/xorg/modules/input/evdev_drv.so (_init+0x3695)
[0x7fe3135e5d15]
(EE) 5: /usr/libexec/Xorg (DPMSSupported+0xe8) [0x478d98]
(EE) 6: /usr/libexec/Xorg (xf86SerialModemClearBits+0x2b2) [0x49e0b2]
(EE) 7: /lib64/libc.so.6 (__restore_rt+0x0) [0x7fe31ed2276f]
(EE) 8: /lib64/libc.so.6 (ioctl+0x5) [0x7fe31ede6b65]
(EE) 9: /lib64/libdrm.so.2 (drmIoctl+0x28) [0x7fe3200cf2b8]
(EE) 10: /lib64/libdrm.so.2 (drmCommandWrite+0x1b) [0x7fe3200d1e2b]
(EE) 11: /lib64/libdrm_nouveau.so.2 (nouveau_bo_wait+0xc2) [0x7fe3198b31f2]
(EE) 12: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (_init+0x20faa)
[0x7fe319aff17a]
(EE) 13: /usr/libexec/Xorg (xf86DetachAllCrtc+0xb3b) [0x4b21fb]
(EE) 14: /usr/libexec/Xorg (xf86DestroyCursorInfoRec+0xb6a) [0x4bc99a]
(EE) 15: /usr/libexec/Xorg (RamDacHandleColormaps+0x83a) [0x4bb1ea]
(EE) 16: /usr/libexec/Xorg (miPointerUpdateSprite+0x26b) [0x5862db]
(EE) 17: /usr/libexec/Xorg (miPointerUpdateSprite+0x4ba) [0x58697a]
(EE) 18: /usr/libexec/Xorg
(CompositeRegisterImplicitRedirectionException+0x42b9) [0x4cd289]
(EE) 19: /usr/libexec/Xorg (AddTraps+0x7810) [0x5205c0]
(EE) 20: /usr/libexec/Xorg (ConfineToShape+0x9a8) [0x440578]
(EE) 21: /usr/libexec/Xorg (WindowHasNewCursor+0x37) [0x441067]
(EE) 22: /usr/libexec/Xorg
(CompositeRegisterImplicitRedirectionException+0x3f20) [0x4ccc60]
(EE) 23: /usr/libexec/Xorg
(CompositeRegisterImplicitRedirectionException+0x4eda) [0x4cebda]
(EE) 24: /usr/libexec/Xorg (SendErrorToClient+0x2df) [0x436e2f]
(EE) 25: /usr/libexec/Xorg (remove_fs_handlers+0x463) [0x43ae63]
(EE) 26: /lib64/libc.so.6 (__libc_start_main+0xf1) [0x7fe31ed0e731]
(EE) 27: /usr/libexec/Xorg (_start+0x29) [0x424d59]
(EE) 28: ? (?+0x29) [0x29]
(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.

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