Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: network-manager (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1771188

Title:
  Ubuntu 18.04 System hangs when logging in or rebooting.  Shutdown
  reboots instead.  Suspend wakes after suspending.

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Originally I thought the system had crashed when logging in or
  shutdown.  But it turns out it's hanging for about 60-90 seconds.
  When shutting down system will reboot instead.

  lsb_release -rd
  Description:  Ubuntu 18.04 LTS
  Release:      18.04

  uname -a
  Linux bridge 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 
x86_64 x86_64 x86_64 GNU/Linux

  Clean install.
  Shutting down system reboots instead.
  Suspends does not stay suspended.
  Login and shutdown hangs for a long time (60-90 seconds)

  
  Seeing these in logs.

  [  197.300273] ------------[ cut here ]------------
  [  197.300274] nouveau 0000:01:00.0: timeout
  [  197.300336] WARNING: CPU: 5 PID: 1938 at 
/build/linux-5s7Xkn/linux-4.15.0/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgf100.c:207
 gf100_vmm_flush_+0x15c/0x1a0 [nouveau]
  [  197.300336] Modules linked in: msr thunderbolt cmac bnep nouveau ttm arc4 
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core 
videodev btusb btrtl media btbcm btintel bluetooth ecdh_generic nls_iso8859_1 
ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 
nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG 
xt_limit xt_tcpudp xt_addrtype snd_hda_codec_hdmi hid_multitouch 
snd_hda_codec_realtek dell_smbios_wmi snd_hda_codec_generic dell_wmi 
dell_wmi_descriptor intel_wmi_thunderbolt wmi_bmof mxm_wmi dell_laptop 
dell_smbios_smm dell_smbios dcdbas nf_conntrack_ipv4 nf_defrag_ipv4 
snd_hda_intel xt_conntrack dell_smm_hwmon snd_hda_codec snd_hda_core intel_rapl 
snd_hwdep x86_pkg_temp_thermal intel_powerclamp coretemp snd_pcm kvm_intel kvm 
snd_seq_midi
  [  197.300373]  snd_seq_midi_event irqbypass crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel pcbc snd_rawmidi ath10k_pci snd_seq ath10k_core aesni_intel 
snd_seq_device ath aes_x86_64 snd_timer crypto_simd glue_helper cryptd 
intel_cstate intel_rapl_perf ip6table_filter mac80211 ip6_tables snd 
nf_conntrack_netbios_ns nf_conntrack_broadcast input_leds joydev nf_nat_ftp 
nf_nat serio_raw cfg80211 idma64 rtsx_pci_ms virt_dma nf_conntrack_ftp memstick 
soundcore nf_conntrack mei_me intel_lpss_pci processor_thermal_device 
intel_pch_thermal shpchp mei intel_lpss intel_soc_dts_iosf libcrc32c wmi 
mac_hid int3403_thermal int340x_thermal_zone int3400_thermal intel_hid 
acpi_thermal_rel acpi_pad tpm_crb sparse_keymap sch_fq_codel parport_pc ppdev 
lp parport iptable_filter ip_tables x_tables autofs4 i915 rtsx_pci_sdmmc
  [  197.300397]  i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt 
nvme fb_sys_fops psmouse drm nvme_core rtsx_pci ahci libahci i2c_hid hid video
  [  197.300403] CPU: 5 PID: 1938 Comm: Xorg Tainted: G        W        
4.15.0-20-generic #21-Ubuntu
  [  197.300404] Hardware name: Dell Inc. XPS 15 9560/05FFDN, BIOS 1.9.4 
04/23/2018
  [  197.300420] RIP: 0010:gf100_vmm_flush_+0x15c/0x1a0 [nouveau]
  [  197.300420] RSP: 0000:ffffb8c0847e7750 EFLAGS: 00010286
  [  197.300421] RAX: 0000000000000000 RBX: ffff980259b63e20 RCX: 
0000000000000006
  [  197.300422] RDX: 0000000000000007 RSI: 0000000000000086 RDI: 
ffff98027e556490
  [  197.300422] RBP: ffffb8c0847e7788 R08: 0000000000000001 R09: 
0000000000000b9f
  [  197.300423] R10: ffffffffc0c6c6d0 R11: 0000000000000000 R12: 
ffff980258b66c00
  [  197.300423] R13: ffff98024e9b8d80 R14: 0000002d78c6d8c0 R15: 
ffff980257106600
  [  197.300424] FS:  00007fcbd5229600(0000) GS:ffff98027e540000(0000) 
knlGS:0000000000000000
  [  197.300425] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [  197.300426] CR2: 00007fcbcb1ed000 CR3: 000000085a34c004 CR4: 
00000000003606e0
  [  197.300426] Call Trace:
  [  197.300442]  gp100_vmm_flush+0x17/0x20 [nouveau]
  [  197.300456]  nvkm_vmm_iter.constprop.13+0x2e5/0x880 [nouveau]
  [  197.300470]  ? gp100_vmm_pgt_dma+0x220/0x220 [nouveau]
  [  197.300483]  ? nvkm_vmm_map_choose+0xb0/0xb0 [nouveau]
  [  197.300496]  nvkm_vmm_map+0x21e/0x400 [nouveau]
  [  197.300508]  ? gp100_vmm_pgt_dma+0x220/0x220 [nouveau]
  [  197.300521]  nvkm_vram_map+0x57/0x80 [nouveau]
  [  197.300533]  gf100_mem_map+0xf8/0x180 [nouveau]
  [  197.300546]  nvkm_umem_map+0x6b/0x100 [nouveau]
  [  197.300556]  nvkm_object_map+0x1a/0x30 [nouveau]
  [  197.300565]  nvkm_ioctl_map+0x78/0xe0 [nouveau]
  [  197.300573]  nvkm_ioctl+0x11d/0x280 [nouveau]
  [  197.300590]  nvkm_client_ioctl+0x12/0x20 [nouveau]
  [  197.300597]  nvif_object_ioctl+0x47/0x50 [nouveau]
  [  197.300605]  nvif_object_map_handle+0x61/0xb0 [nouveau]
  [  197.300621]  nouveau_ttm_io_mem_reserve+0x15c/0x1b0 [nouveau]
  [  197.300624]  ttm_mem_io_reserve+0xb8/0xd0 [ttm]
  [  197.300626]  ttm_mem_io_reserve_vm+0x31/0x90 [ttm]
  [  197.300628]  ttm_bo_vm_fault+0x1b1/0x620 [ttm]
  [  197.300631]  ? current_time+0x32/0x70
  [  197.300632]  ? radix_tree_lookup+0xd/0x10
  [  197.300648]  ? nouveau_gem_ioctl_cpu_prep+0x77/0xa0 [nouveau]
  [  197.300663]  ? nouveau_gem_ioctl_pushbuf+0x1660/0x1660 [nouveau]
  [  197.300670]  ? drm_ioctl_kernel+0x5f/0xb0 [drm]
  [  197.300671]  __do_fault+0x24/0xf0
  [  197.300673]  handle_pte_fault+0x20c/0xdb0
  [  197.300674]  __handle_mm_fault+0x47b/0x5c0
  [  197.300675]  handle_mm_fault+0xb1/0x1f0
  [  197.300677]  __do_page_fault+0x250/0x4d0
  [  197.300678]  do_page_fault+0x2e/0xe0
  [  197.300680]  ? page_fault+0x2f/0x50
  [  197.300681]  page_fault+0x45/0x50
  [  197.300682] RIP: 0033:0x7fcbcf9db614
  [  197.300682] RSP: 002b:00007ffe5cdf3310 EFLAGS: 00010212
  [  197.300683] RAX: 0000000000400000 RBX: 000055bd049a5f60 RCX: 
00007fcbcb1ed000
  [  197.300683] RDX: 00007ffe5cdf32e0 RSI: 0000000040086482 RDI: 
00007fcbcb1ed008
  [  197.300684] RBP: 000055bd048132d0 R08: 000000000000000d R09: 
00000001004da000
  [  197.300684] R10: 0000000000000001 R11: 0000000000000246 R12: 
000055bd049a5f60
  [  197.300685] R13: 0000000000000000 R14: 000055bd02c446a8 R15: 
00007ffe5cdf34f8
  [  197.300686] Code: 41 5e 41 5f 5d c3 49 8b 7c 24 10 48 8b 5f 50 48 85 db 74 
47 e8 86 a9 3c e6 48 89 da 48 89 c6 48 c7 c7 28 d7 d6 c0 e8 a4 2b e1 e5 <0f> 0b 
eb bf 49 8b 7c 24 10 48 8b 5f 50 48 85 db 74 24 e8 5d a9 
  [  197.300704] ---[ end trace e828b07685da769a ]---

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