HI guys .
The Bug  is similar with my graphics panic , so I add related logs here .
When I boot up system ,system will hang at nouveau driver panic , repeat print
nouveau driver  panic info , I must force down the system . 
If i add nouveau.runpm=0  ,system  can boot up normally  without panic .

My graphics : NVIDIA  GM107 

And the panic info is related to pci op.
---------------------------------------------------
[   21.303467] Bluetooth: RFCOMM socket layer initialized
[   21.303471] Bluetooth: RFCOMM ver 1.11
[   22.095603] nouveau 0000:01:00.0: DRM: evicting buffers...
[   22.095605] nouveau 0000:01:00.0: DRM: waiting for kernel channels to go
idle...
[   22.095622] nouveau 0000:01:00.0: DRM: suspending client object trees...
[   22.098407] nouveau 0000:01:00.0: DRM: suspending kernel object tree...
[   22.220120] FAT-fs (sdb1): Volume was not properly unmounted. Some data may
be corrupt. Please run fsck.
[   23.669052] Non-volatile memory driver v1.3
[   24.083662] pci_raw_set_power_state: 48 callbacks suppressed
[   24.083665] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   24.159560] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   24.179571] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   24.179575] nouveau 0000:01:00.0: DRM: resuming kernel object tree...
[   24.179617] nouveau 0000:01:00.0: pci: failed to adjust cap speed
[   24.179618] nouveau 0000:01:00.0: pci: failed to adjust lnkctl speed
[   24.317867] wlp2s0: authenticate with f0:b4:29:87:9e:e4
---------------------------------------------------
and the frequently panic is :

ul 21 18:38:50 localhost kernel: [<ffffffffa03c463b>] ?
nv04_timer_read+0x2b/0x70 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa03c41af>] nvkm_timer_read+0xf/0x20
[nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa03bc598>] nvkm_pmu_init+0x58/0x480
[nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa0374e8e>]
nvkm_subdev_init+0xee/0x230 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa03c84df>]
nvkm_device_init+0x18f/0x280 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa03cc138>]
nvkm_udevice_init+0x48/0x60 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa03736c0>]
nvkm_object_init+0x50/0x1c0 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa0373705>]
nvkm_object_init+0x95/0x1c0 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa037062e>]
nvkm_client_init+0xe/0x10 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa04125fe>]
nvkm_client_resume+0xe/0x10 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa036f7b4>]
nvif_client_resume+0x14/0x20 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa040fbed>]
nouveau_do_resume+0x4d/0x130 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffffa041000c>]
nouveau_pmops_runtime_resume+0x7c/0x120 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffff81350c8b>]
pci_pm_runtime_resume+0x7b/0xc0
Jul 21 18:38:50 localhost kernel: [<ffffffff81350c10>] ?
pci_restore_standard_config+0x40/0x40
Jul 21 18:38:50 localhost kernel: [<ffffffff8142ddb6>] __rpm_callback+0x36/0xc0
Jul 21 18:38:50 localhost kernel: [<ffffffff8142de64>] rpm_callback+0x24/0x80
Jul 21 18:38:50 localhost kernel: [<ffffffff8142ee39>] rpm_resume+0x4e9/0x670
Jul 21 18:38:50 localhost kernel: [<ffffffff812a7ffb>] ?
cred_has_capability+0x6b/0x120
Jul 21 18:38:50 localhost kernel: [<ffffffff8142f00f>]
__pm_runtime_resume+0x4f/0x80
Jul 21 18:38:50 localhost kernel: [<ffffffffa04107bb>]
nouveau_drm_open+0x3b/0x1b0 [nouveau]
Jul 21 18:38:50 localhost kernel: [<ffffffff812a80de>] ?
selinux_capable+0x2e/0x40
Jul 21 18:38:50 localhost kernel: [<ffffffff812a1cc8>] ?
security_capable+0x18/0x20
Jul 21 18:38:50 localhost kernel: [<ffffffffa008add6>] drm_open+0x1f6/0x470
[drm]
Jul 21 18:38:50 localhost kernel: [<ffffffffa0091759>] drm_stub_open+0xa9/0x120
[drm]
Jul 21 18:38:50 localhost kernel: [<ffffffff811fc4b1>] chrdev_open+0xa1/0x1e0
Jul 21 18:38:50 localhost kernel: [<ffffffff811f5567>]
do_dentry_open+0x1a7/0x2e0
Jul 21 18:38:50 localhost kernel: [<ffffffff812a21ac>] ?
security_inode_permission+0x1c/0x30
Jul 21 18:38:50 localhost kernel: [<ffffffff811fc410>] ? cdev_put+0x30/0x30
Jul 21 18:38:50 localhost kernel: [<ffffffff811f573d>] vfs_open+0x5d/0xd0
Jul 21 18:38:50 localhost kernel: [<ffffffff81203058>] ? may_open+0x68/0x110
Jul 21 18:38:50 localhost kernel: [<ffffffff81206b3d>] do_last+0x1ed/0x12a0
Jul 21 18:38:50 localhost kernel: [<ffffffff811d9c96>] ?
kmem_cache_alloc_trace+0x1d6/0x200
Jul 21 18:38:50 localhost kernel: [<ffffffff81207cb2>] path_openat+0xc2/0x490
Jul 21 18:38:50 localhost kernel: [<ffffffff8120947b>] do_filp_open+0x4b/0xb0
Jul 21 18:38:50 localhost kernel: [<ffffffff812160a7>] ? __alloc_fd+0xa7/0x130
Jul 21 18:38:50 localhost kernel: [<ffffffff811f6a93>] do_sys_open+0xf3/0x1f0
Jul 21 18:38:50 localhost kernel: [<ffffffff811f6bae>] SyS_open+0x1e/0x20
Jul 21 18:38:50 localhost kernel: [<ffffffff816956c9>]
system_call_fastpath+0x16/0x1b