Ross Green changed bug 1137067
What Removed Added
Status NEW RESOLVED
Resolution --- NORESPONSE

Comment # 9 on bug 1137067 from 
Just looked at the Stack Trace unwind and it does look similar to bug 1136978.

In particular to the calls from drm_kms_helper.

While setting nomodeset might make some of the driver work.
It really is just hiding the problem considering that the earlier release
kernel functioned better, i.e booted cleanly.

As mentioned before the stack trace should help work exactly what the problem
is.

I understand this later kernel has drawn heavily from 5.0 kernel driver,
it may pay to check further with both 5.1 and 5.2 updates to see if there is
already an upstream fix. It may also be that there are other things missing
from upstream kernels that might be required

Ross

2019-05-31T11:08:23.970542+02:00 linux-ilj4 kernel: [    3.574019] BUG: unable
to handle kernel NULL pointer dereference at         
  (null)
2019-05-31T11:08:23.970543+02:00 linux-ilj4 kernel: [    3.574023] IP:         
 (null)
2019-05-31T11:08:23.970543+02:00 linux-ilj4 kernel: [    3.574025] PGD 0 P4D 0 
2019-05-31T11:08:23.970544+02:00 linux-ilj4 kernel: [    3.574027] Oops: 0010
[#1] SMP PTI
2019-05-31T11:08:23.970546+02:00 linux-ilj4 kernel: [    3.574030] CPU: 1 PID:
312 Comm: systemd-udevd Not tainted 4.12.14-lp151.28.
4-default #1 openSUSE Leap 15.1
2019-05-31T11:08:23.970546+02:00 linux-ilj4 kernel: [    3.574032] Hardware
name: Hewlett-Packard HP Z420 Workstation/1589, BIOS J61
 v03.15 05/09/2013
2019-05-31T11:08:23.970547+02:00 linux-ilj4 kernel: [    3.574033] task:
ffff880808c04040 task.stack: ffffc90004090000
2019-05-31T11:08:23.970547+02:00 linux-ilj4 kernel: [    3.574035] RIP: 0010:  
       (null)
2019-05-31T11:08:23.970547+02:00 linux-ilj4 kernel: [    3.574036] RSP:
0018:ffffc900040937d8 EFLAGS: 00010246
2019-05-31T11:08:23.970548+02:00 linux-ilj4 kernel: [    3.574038] RAX:
0000000000000000 RBX: 0000000000000020 RCX: ffffc9000409386f
2019-05-31T11:08:23.970548+02:00 linux-ilj4 kernel: [    3.574040] RDX:
ffff880808c04040 RSI: ffffc900040937e8 RDI: ffff88080766b490
2019-05-31T11:08:23.970550+02:00 linux-ilj4 kernel: [    3.574042] RBP:
0000000000000001 R08: 0000000000000001 R09: ffff88080f223980
2019-05-31T11:08:23.970551+02:00 linux-ilj4 kernel: [    3.574043] R10:
0000000000000000 R11: 0000000000000040 R12: 00000000fffffffb
2019-05-31T11:08:23.970551+02:00 linux-ilj4 kernel: [    3.574045] R13:
ffff88080766b490 R14: 0000000000000000 R15: ffff880808b5b218
2019-05-31T11:08:23.970552+02:00 linux-ilj4 kernel: [    3.574047] FS: 
00007f2be4dfed40(0000) GS:ffff88080f240000(0000) knlGS:00000
00000000000
2019-05-31T11:08:23.970552+02:00 linux-ilj4 kernel: [    3.574049] CS:  0010
DS: 0000 ES: 0000 CR0: 0000000080050033
2019-05-31T11:08:23.970552+02:00 linux-ilj4 kernel: [    3.574050] CR2:
0000000000000000 CR3: 0000000808aa4001 CR4: 00000000000606e0
2019-05-31T11:08:23.970554+02:00 linux-ilj4 kernel: [    3.574052] Call Trace:
2019-05-31T11:08:23.970555+02:00 linux-ilj4 kernel: [    3.574063]  ?
drm_dp_dpcd_access+0x69/0xf0 [drm_kms_helper]
2019-05-31T11:08:23.970555+02:00 linux-ilj4 kernel: [    3.574067]  ?
drm_dp_dpcd_read+0x2e/0xc0 [drm_kms_helper]
2019-05-31T11:08:23.970556+02:00 linux-ilj4 kernel: [    3.574072]  ?
drm_dp_cec_set_edid+0x4e/0x140 [drm_kms_helper]
2019-05-31T11:08:23.970556+02:00 linux-ilj4 kernel: [    3.574116]  ?
nouveau_connector_detect+0x1fd/0x440 [nouveau]
2019-05-31T11:08:23.970557+02:00 linux-ilj4 kernel: [    3.574123]  ?
drm_helper_probe_single_connector_modes+0xc3/0x6b0 [drm_kms_he
lper]
2019-05-31T11:08:23.970557+02:00 linux-ilj4 kernel: [    3.574152]  ?
nouveau_connector_force+0x80/0x80 [nouveau]
2019-05-31T11:08:23.970559+02:00 linux-ilj4 kernel: [    3.574158]  ?
drm_helper_probe_single_connector_modes+0xc3/0x6b0 [drm_kms_he
lper]
2019-05-31T11:08:23.970560+02:00 linux-ilj4 kernel: [    3.574164]  ?
dev_vprintk_emit+0x108/0x220
2019-05-31T11:08:23.970560+02:00 linux-ilj4 kernel: [    3.574170]  ?
drm_setup_crtcs+0x139/0xa80 [drm_kms_helper]
2019-05-31T11:08:23.970560+02:00 linux-ilj4 kernel: [    3.574176]  ?
__drm_fb_helper_initial_config_and_unlock+0x2d/0x400 [drm_kms_
helper]
2019-05-31T11:08:23.970561+02:00 linux-ilj4 kernel: [    3.574182]  ?
mutex_lock+0xe/0x30
2019-05-31T11:08:23.970561+02:00 linux-ilj4 kernel: [    3.574210]  ?
nouveau_fbcon_init+0x14f/0x1c0 [nouveau]
2019-05-31T11:08:23.970563+02:00 linux-ilj4 kernel: [    3.574236]  ?
nouveau_drm_device_init+0x184/0x7f0 [nouveau]
2019-05-31T11:08:23.970564+02:00 linux-ilj4 kernel: [    3.574263]  ?
nouveau_drm_probe+0x1eb/0x2b0 [nouveau]
2019-05-31T11:08:23.970564+02:00 linux-ilj4 kernel: [    3.574266]  ?
__pm_runtime_resume+0x54/0x70
2019-05-31T11:08:23.970565+02:00 linux-ilj4 kernel: [    3.574271]  ?
local_pci_probe+0x42/0xa0
2019-05-31T11:08:23.970565+02:00 linux-ilj4 kernel: [    3.574274]  ?
pci_device_probe+0x13c/0x160
2019-05-31T11:08:23.970566+02:00 linux-ilj4 kernel: [    3.574279]  ?
driver_probe_device+0x2f7/0x440
2019-05-31T11:08:23.970566+02:00 linux-ilj4 kernel: [    3.574282]  ?
__driver_attach+0xb8/0xe0
2019-05-31T11:08:23.970568+02:00 linux-ilj4 kernel: [    3.574285]  ?
driver_probe_device+0x440/0x440
2019-05-31T11:08:23.970568+02:00 linux-ilj4 kernel: [    3.574288]  ?
bus_for_each_dev+0x5e/0x90
2019-05-31T11:08:23.970569+02:00 linux-ilj4 kernel: [    3.574291]  ?
bus_add_driver+0x161/0x260
2019-05-31T11:08:23.970569+02:00 linux-ilj4 kernel: [    3.574293]  ?
0xffffffffa05cf000
2019-05-31T11:08:23.970570+02:00 linux-ilj4 kernel: [    3.574296]  ?
driver_register+0x57/0xc0
2019-05-31T11:08:23.970570+02:00 linux-ilj4 kernel: [    3.574299]  ?
0xffffffffa05cf000
2019-05-31T11:08:23.970570+02:00 linux-ilj4 kernel: [    3.574303]  ?
do_one_initcall+0x4e/0x190
2019-05-31T11:08:23.970573+02:00 linux-ilj4 kernel: [    3.574308]  ?
__vunmap+0x6d/0xb0
2019-05-31T11:08:23.970574+02:00 linux-ilj4 kernel: [    3.574310]  ?
__vunmap+0x6d/0xb0
2019-05-31T11:08:23.970574+02:00 linux-ilj4 kernel: [    3.574314]  ?
do_init_module+0x5b/0x1e4
2019-05-31T11:08:23.970575+02:00 linux-ilj4 kernel: [    3.574319]  ?
load_module+0x18ec/0x1f80
2019-05-31T11:08:23.970575+02:00 linux-ilj4 kernel: [    3.574324]  ?
SYSC_finit_module+0xb7/0xd0
2019-05-31T11:08:23.970575+02:00 linux-ilj4 kernel: [    3.574327]  ?
SYSC_finit_module+0xb7/0xd0
2019-05-31T11:08:23.970577+02:00 linux-ilj4 kernel: [    3.574330]  ?
do_syscall_64+0x7b/0x160
2019-05-31T11:08:23.970578+02:00 linux-ilj4 kernel: [    3.574334]  ?
entry_SYSCALL_64_after_hwframe+0x3d/0xa2

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