[Bug 106192] 4.16.2+ lightdm logon screen will not unblank after monitors fall asleep

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106192

--- Comment #2 from Joel Sass <sass.joel at gmail.com> ---
Created attachment 139010
  --> https://bugs.freedesktop.org/attachment.cgi?id=139010&action=edit
Dmesg shows kernel error after freezing. Had to acquire with ssh.

Looks like a kernel bug issue. This 

[  966.373770] BUG: unable to handle kernel paging request at ffffb419820f3c60
[  966.373776] IP: __ww_mutex_lock.isra.3+0x283/0x670
[  966.373777] PGD 46ed48067 P4D 46ed48067 PUD 46ed49067 PMD 461fc5067 PTE 0
[  966.373780] Oops: 0000 [#2] SMP PTI
[  966.373781] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp
bridge stp llc rfcomm ebtable_filter ebtables ip6table_filter ip6_tables
iptable_filter ip_tables x_tables bnep binfmt_misc btusb btrtl btbcm btintel
bluetooth snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi
snd_hda_intel ecdh_generic snd_hda_codec applesmc input_leds input_polldev
intel_powerclamp coretemp snd_seq_midi snd_hda_core intel_cstate
snd_seq_midi_event snd_hwdep snd_rawmidi snd_pcm snd_seq snd_seq_device
snd_timer snd lpc_ich kvm_intel kvm irqbypass soundcore shpchp i5500_temp
mac_hid ioatdma i7core_edac dca parport_pc ppdev lp parport autofs4 raid10
raid456
[  966.373810]  async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 raid0 multipath linear amdkfd amd_iommu_v2 amdgpu
chash i2c_algo_bit gpu_sched ttm hid_generic drm_kms_helper e1000e
firewire_ohci syscopyarea sysfillrect usbhid sysimgblt ptp fb_sys_fops
pata_acpi firewire_core crc_itu_t hid pps_core drm
[  966.373825] CPU: 4 PID: 3205 Comm: Xorg Tainted: G      D W I      4.16.2+
#1
[  966.373826] Hardware name: Apple Inc. MacPro4,1/Mac-F221BEC8, BIOS    
MP41.88Z.0081.B07.0910130729 10/13/09
[  966.373828] RIP: 0010:__ww_mutex_lock.isra.3+0x283/0x670
[  966.373828] RSP: 0018:ffffb41982473870 EFLAGS: 00010282
[  966.373829] RAX: ffffb419820f3c58 RBX: ffff9735a1096830 RCX:
00000000000000e7
[  966.373830] RDX: ffff9735a530be81 RSI: ffff97357cbbbe80 RDI:
ffffb41982473890
[  966.373831] RBP: ffffb419824738f0 R08: ffff9735a34ab080 R09:
ffff9735a3ab0b80
[  966.373831] R10: ffffb41982473908 R11: 0000000000002800 R12:
0000000000000002
[  966.373832] R13: ffff9735a1096828 R14: ffffb419824739c8 R15:
0000000000000000
[  966.373833] FS:  00007faa1e832a00(0000) GS:ffff9735af300000(0000)
knlGS:0000000000000000
[  966.373834] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  966.373835] CR2: ffffb419820f3c60 CR3: 0000000443164000 CR4:
00000000000006e0
[  966.373836] Call Trace:
[  966.373839]  __ww_mutex_lock_slowpath+0x16/0x20
[  966.373840]  ? __ww_mutex_lock_slowpath+0x16/0x20
[  966.373841]  ww_mutex_lock+0x5a/0x70
[  966.373852]  drm_modeset_lock+0x35/0xb0 [drm]
[  966.373858]  drm_atomic_get_crtc_state+0x5b/0x110 [drm]
[  966.373865]  drm_atomic_get_plane_state+0xec/0x110 [drm]
[  966.373870]  restore_fbdev_mode_atomic+0xd5/0x200 [drm_kms_helper]
[  966.373873]  restore_fbdev_mode+0x31/0x140 [drm_kms_helper]
[  966.373875]  ? _cond_resched+0x19/0x40
[  966.373878]  drm_fb_helper_restore_fbdev_mode_unlocked+0x4e/0xa0
[drm_kms_helper]
[  966.373881]  drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[  966.373883]  fb_set_var+0x19f/0x440
[  966.373885]  ? mem_cgroup_uncharge_list+0x69/0x90
[  966.373888]  fbcon_blank+0x2b7/0x3a0
[  966.373891]  do_unblank_screen+0xba/0x1b0
[  966.373892]  vt_ioctl+0x4e1/0x1150
[  966.373894]  ? jbd2_journal_stop+0xf6/0x3f0
[  966.373896]  tty_ioctl+0xf6/0x8c0
[  966.373898]  ? fsnotify_grab_connector+0x43/0x70
[  966.373900]  ? call_rcu_sched+0x17/0x20
[  966.373901]  do_vfs_ioctl+0xa8/0x630
[  966.373903]  ? __fput+0x193/0x220
[  966.373904]  SyS_ioctl+0x79/0x90
[  966.373907]  do_syscall_64+0x73/0x130
[  966.373908]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[  966.373909] RIP: 0033:0x7faa1c69bf47
[  966.373910] RSP: 002b:00007ffd3892b788 EFLAGS: 00003246 ORIG_RAX:
0000000000000010
[  966.373911] RAX: ffffffffffffffda RBX: 000055aa519db820 RCX:
00007faa1c69bf47
[  966.373912] RDX: 0000000000000000 RSI: 0000000000004b3a RDI:
000000000000000a
[  966.373912] RBP: 00007ffd3892b800 R08: 000055aa5257a420 R09:
000055aa5257a100
[  966.373913] R10: 000000000000003a R11: 0000000000003246 R12:
00007ffd3892b970
[  966.373914] R13: 0000000000000001 R14: 0000000000000005 R15:
000055aa519e5360
[  966.373915] Code: cd 03 00 00 45 84 ff 0f 85 43 02 00 00 48 89 df e8 03 34
00 00 e9 39 ff ff ff 49 8b 45 20 48 85 c0 0f 84 38 03 00 00 49 8b 4e 08 <48> 8b
50 08 48 39 d1 0f 88 27 03 00 00 48 39 d1 75 09 49 39 c6 
[  966.373934] RIP: __ww_mutex_lock.isra.3+0x283/0x670 RSP: ffffb41982473870
[  966.373935] CR2: ffffb419820f3c60
[  966.373936] ---[ end trace 57a9c31f2648be5f ]---

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