Public bug reported:

With kernel

Linux version 5.4.0-77-lowlatency (buildd@lgw01-amd64-028) (gcc version
9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #86-Ubuntu SMP PREEMPT Thu Jun 17
03:26:36 UTC 2021 (Ubuntu 5.4.0-77.86-lowlatency 5.4.119)

in Ubuntustudio I got two system freezes (video frozen, mouse and
keyboard without function) some seconds after login in the last days.

In the journal I see in both cases a kernel error referring to drm_kms:

---------------------------------------------------------------------------------
Jul 26 20:26:21 marco-MS-7817 kernel: [drm:drm_atomic_helper_wait_for_flip_done 
[drm_kms_helper]] *ERROR* [CRTC:42:pipe A] flip_done timed out
Jul 26 20:26:22 marco-MS-7817 systemd[1]: systemd-fsckd.service: Succeeded.
Jul 26 20:26:21 marco-MS-7817 systemd-timesyncd[667]: Initial synchronization 
to time server 91.189.94.4:123 (ntp.ubuntu.com).
Jul 26 20:26:21 marco-MS-7817 systemd[1]: Starting Daily apt upgrade and clean 
activities...
Jul 26 20:26:21 marco-MS-7817 systemd[1]: systemd-hostnamed.service: Succeeded.
Jul 26 20:26:22 marco-MS-7817 systemd[1]: blueman-mechanism.service: Succeeded.
Jul 26 20:26:23 marco-MS-7817 systemd[1]: apt-daily-upgrade.service: Succeeded.
Jul 26 20:26:23 marco-MS-7817 systemd[1]: Finished Daily apt upgrade and clean 
activities.
Jul 26 20:26:27 marco-MS-7817 autojack[2631]: JACK MIDI <-> ALSA sequencer MIDI 
bridge, version 9 built on Sun Oct 13 18:36:50 2019
Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Copyright 2006,2007 Dmitry S. 
Baikov
Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Copyright 
2007,2008,2009,2011,2012 Nedko Arnaudov
Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Bridge starting...
Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Using JACK server 'default'
Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Hardware ports will be exported.
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: Cannot read socket fd = 6 err = 
Success
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: CheckRes error
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: JackSocketClientChannel read fail
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: Cannot open a2j client
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: 
JackShmReadWritePtr1::~JackShmReadWritePtr1 - Init not done for -1, skipping 
unlock
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: 
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping 
unlock
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: 
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping 
unlock
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: ERROR: a2j_jack_client_create: 
Cannot create jack client
Jul 26 20:26:32 marco-MS-7817 autojack[2631]: ERROR: a2j_start: a2j_new() 
failed.
Jul 26 20:27:04 marco-MS-7817 kernel: rcu: INFO: rcu_preempt self-detected 
stall on CPU
Jul 26 20:27:04 marco-MS-7817 kernel: rcu:         0-....: (60004 ticks this 
GP) idle=7ca/1/0x4000000000000002 softirq=23094/23094 fqs=14881
Jul 26 20:27:04 marco-MS-7817 kernel:         (t=60000 jiffies g=11765 q=87882)
Jul 26 20:27:04 marco-MS-7817 kernel: NMI backtrace for cpu 0
Jul 26 20:27:04 marco-MS-7817 kernel: CPU: 0 PID: 2446 Comm: jackdbus Tainted: 
G           OE     5.4.0-77-lowlatency #86-Ubuntu
Jul 26 20:27:04 marco-MS-7817 kernel: Hardware name: MSI MS-7817/H81M-E34 
(MS-7817), BIOS V17.5 03/30/2015
Jul 26 20:27:04 marco-MS-7817 kernel: Call Trace:
Jul 26 20:27:04 marco-MS-7817 kernel:  <IRQ>
Jul 26 20:27:04 marco-MS-7817 kernel:  dump_stack+0x6d/0x8b
Jul 26 20:27:04 marco-MS-7817 kernel:  ? lapic_can_unplug_cpu+0x80/0x80
Jul 26 20:27:04 marco-MS-7817 kernel:  nmi_cpu_backtrace.cold+0x14/0x53
Jul 26 20:27:04 marco-MS-7817 kernel:  nmi_trigger_cpumask_backtrace+0xfa/0x110
Jul 26 20:27:04 marco-MS-7817 kernel:  arch_trigger_cpumask_backtrace+0x19/0x20
Jul 26 20:27:04 marco-MS-7817 kernel:  rcu_dump_cpu_stacks+0x99/0xcb
Jul 26 20:27:04 marco-MS-7817 kernel:  rcu_sched_clock_irq.cold+0x25e/0x4f0
Jul 26 20:27:04 marco-MS-7817 kernel:  update_process_times+0x2c/0x60
Jul 26 20:27:04 marco-MS-7817 kernel:  tick_sched_handle+0x29/0x60
Jul 26 20:27:04 marco-MS-7817 kernel:  tick_sched_timer+0x3d/0x80
Jul 26 20:27:04 marco-MS-7817 kernel:  __hrtimer_run_queues+0xf7/0x2c0
Jul 26 20:27:04 marco-MS-7817 kernel:  ? tick_sched_do_timer+0x60/0x60
Jul 26 20:27:04 marco-MS-7817 kernel:  hrtimer_interrupt+0x109/0x220
Jul 26 20:27:04 marco-MS-7817 kernel:  smp_apic_timer_interrupt+0x71/0x170
Jul 26 20:27:04 marco-MS-7817 kernel:  apic_timer_interrupt+0xf/0x20
Jul 26 20:27:04 marco-MS-7817 kernel:  </IRQ>
Jul 26 20:27:04 marco-MS-7817 kernel: RIP: 0010:read_tsc+0x3/0x10
Jul 26 20:27:04 marco-MS-7817 kernel: Code: 5d c3 90 90 90 90 90 8b 05 66 e0 80 
01 c3 66 0f 1f 84 00 00 00 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 
00 0f 01 f9 <66> 90 48 c1 e2 20 48 09 d0 c.3 0f 1f 00 8b 0d ea 83 ae 01 48 89 f8
Jul 26 20:27:04 marco-MS-7817 kernel: RSP: 0018:ffffb32e40e5bea8 EFLAGS: 
00000246 ORIG_RAX: ffffffffffffff13
Jul 26 20:27:04 marco-MS-7817 kernel: RAX: 00000000068f6570 RBX: 
ffffb32e40e5bf00 RCX: 0000000000000000
Jul 26 20:27:04 marco-MS-7817 kernel: RDX: 0000000000000044 RSI: 
000000000000001f RDI: ffffffffaf030ca0
Jul 26 20:27:04 marco-MS-7817 kernel: RBP: ffffb32e40e5bec8 R08: 
0000000000000000 R09: 0000000000000000
Jul 26 20:27:04 marco-MS-7817 kernel: R10: 0000000000000000 R11: 
0000000000000000 R12: 0000000000000000
Jul 26 20:27:04 marco-MS-7817 kernel: R13: 00000000000248f4 R14: 
0000000000000000 R15: 0000000000000000
Jul 26 20:27:04 marco-MS-7817 kernel:  ? recalibrate_cpu_khz+0x10/0x10
Jul 26 20:27:04 marco-MS-7817 kernel:  ? ktime_get_ts64+0x4c/0xe0
Jul 26 20:27:04 marco-MS-7817 kernel:  poll_select_set_timeout+0x50/0x80
Jul 26 20:27:04 marco-MS-7817 kernel:  __x64_sys_poll+0x97/0x150
Jul 26 20:27:04 marco-MS-7817 kernel:  do_syscall_64+0x57/0x190
Jul 26 20:27:04 marco-MS-7817 kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xa9
Jul 26 20:27:04 marco-MS-7817 kernel: RIP: 0033:0x7f8d053a4aff
Jul 26 20:27:04 marco-MS-7817 kernel: Code: 54 24 1c 48 89 74 24 10 48 89 7c 24 
08 e8 79 1c f8 ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 48 8b 7c 24 08 b8 07 00 
00 00 0f 05 <48> 3d 00 f0 ff ff 77 2b 44 89 c7 89 44 24 08 e8 ad 1c f8 ff 8b 44
Jul 26 20:27:04 marco-MS-7817 kernel: RSP: 002b:00007f8d04626d50 EFLAGS: 
00000246 ORIG_RAX: 0000000000000007
Jul 26 20:27:04 marco-MS-7817 kernel: RAX: ffffffffffffffda RBX: 
0000000000000002 RCX: 00007f8d053a4aff
Jul 26 20:27:04 marco-MS-7817 kernel: RDX: 0000000000007cff RSI: 
0000000000000002 RDI: 000055a45ca1eec0
Jul 26 20:27:04 marco-MS-7817 kernel: RBP: 000000000484ea79 R08: 
0000000000000002 R09: 00007f8d04626d58
Jul 26 20:27:04 marco-MS-7817 kernel: R10: 00007f8d04626d50 R11: 
0000000000000246 R12: 0000000000000001
Jul 26 20:27:04 marco-MS-7817 kernel: R13: 0000000000000001 R14: 
00000000ffffffff R15: 000055a45ca86070
Jul 26 20:27:56 marco-MS-7817 systemd[1]: Starting Ubuntu Advantage APT and 
MOTD Messages...
Jul 26 20:27:56 marco-MS-7817 systemd[1]: ua-messaging.service: Succeeded.
Jul 26 20:27:56 marco-MS-7817 systemd[1]: Finished Ubuntu Advantage APT and 
MOTD Messages.
Jul 26 20:28:00 marco-MS-7817 kernel: usb 5-1.3.4: USB disconnect, device 
number 8

---------------------------------------------------------------------------------

My system:

System:    Host: marco-MS-7817 Kernel: 5.4.0-80-lowlatency x86_64 bits: 64 
Desktop: Xfce 4.14.2
           Distro: Ubuntu 20.04.2 LTS (Focal Fossa)
Machine:   Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 serial: 
<superuser/root required>
           BIOS: American Megatrends v: 17.5 date: 03/30/2015
CPU:       Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP L2 
cache: 6144 KiB
           Speed: 3200 MHz min/max: 800/3200 MHz Core speeds (MHz): 1: 3200 2: 
3200 3: 3201 4: 3201
Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated 
Graphics driver: i915 v: kernel
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: 
fbdev,vesa resolution: 1920x1080~60Hz
           OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 
Mesa 20.2.6
Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
driver: snd_hda_intel
           Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio
           Device-3: AKAI Professional M.I. type: USB driver: 
hid-generic,snd-usb-audio,usbhid
           Sound Server: ALSA v: k5.4.0-80-lowlatency
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
driver: r8168
           IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: 
d8:cb:8a:e8:e9:99
Drives:    Local Storage: total: 538.03 GiB used: 219.96 GiB (40.9%)
           ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 
GiB
           ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 
size: 232.89 GiB
           ID-3: /dev/sdc type: USB vendor: SanDisk model: Ultra size: 57.30 GiB
           ID-4: /dev/sdd type: USB vendor: SanDisk model: U3 Cruzer Micro 
size: 14.95 GiB
Partition: ID-1: / size: 36.41 GiB used: 14.84 GiB (40.8%) fs: ext4 dev: 
/dev/sda1
           ID-2: /home size: 184.23 GiB used: 116.46 GiB (63.2%) fs: ext4 dev: 
/dev/sda6
           ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: 
/dev/sda5
Sensors:   System Temperatures: cpu: 36.0 C mobo: N/A
           Fan Speeds (RPM): N/A
Info:      Processes: 227 Uptime: 15m Memory: 7.23 GiB used: 1.39 GiB (19.2%) 
Shell: bash inxi: 3.0.38

Description:    Ubuntu 20.04.2 LTS
Release:        20.04

** Affects: ubuntu
     Importance: Undecided
         Status: New

** Description changed:

  With kernel
  
  Linux version 5.4.0-77-lowlatency (buildd@lgw01-amd64-028) (gcc version
  9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #86-Ubuntu SMP PREEMPT Thu Jun 17
  03:26:36 UTC 2021 (Ubuntu 5.4.0-77.86-lowlatency 5.4.119)
  
- in Ubuntustudio I got twice system freezes (video frozen, mouse and
- keyboard without function) some seconds after login.
+ in Ubuntustudio I got two system freezes (video frozen, mouse and
+ keyboard without function) some seconds after login in the last days.
  
  In the journal I see in both cases a kernel error referring to drm_kms:
  
  
---------------------------------------------------------------------------------
  Jul 26 20:26:21 marco-MS-7817 kernel: 
[drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* 
[CRTC:42:pipe A] flip_done timed out
  Jul 26 20:26:22 marco-MS-7817 systemd[1]: systemd-fsckd.service: Succeeded.
  Jul 26 20:26:21 marco-MS-7817 systemd-timesyncd[667]: Initial synchronization 
to time server 91.189.94.4:123 (ntp.ubuntu.com).
  Jul 26 20:26:21 marco-MS-7817 systemd[1]: Starting Daily apt upgrade and 
clean activities...
  Jul 26 20:26:21 marco-MS-7817 systemd[1]: systemd-hostnamed.service: 
Succeeded.
  Jul 26 20:26:22 marco-MS-7817 systemd[1]: blueman-mechanism.service: 
Succeeded.
  Jul 26 20:26:23 marco-MS-7817 systemd[1]: apt-daily-upgrade.service: 
Succeeded.
  Jul 26 20:26:23 marco-MS-7817 systemd[1]: Finished Daily apt upgrade and 
clean activities.
  Jul 26 20:26:27 marco-MS-7817 autojack[2631]: JACK MIDI <-> ALSA sequencer 
MIDI bridge, version 9 built on Sun Oct 13 18:36:50 2019
  Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Copyright 2006,2007 Dmitry S. 
Baikov
  Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Copyright 
2007,2008,2009,2011,2012 Nedko Arnaudov
  Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Bridge starting...
  Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Using JACK server 'default'
  Jul 26 20:26:27 marco-MS-7817 autojack[2631]: Hardware ports will be exported.
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: Cannot read socket fd = 6 err = 
Success
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: CheckRes error
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: JackSocketClientChannel read 
fail
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: Cannot open a2j client
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: 
JackShmReadWritePtr1::~JackShmReadWritePtr1 - Init not done for -1, skipping 
unlock
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: 
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping 
unlock
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: 
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping 
unlock
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: ERROR: a2j_jack_client_create: 
Cannot create jack client
  Jul 26 20:26:32 marco-MS-7817 autojack[2631]: ERROR: a2j_start: a2j_new() 
failed.
  Jul 26 20:27:04 marco-MS-7817 kernel: rcu: INFO: rcu_preempt self-detected 
stall on CPU
- Jul 26 20:27:04 marco-MS-7817 kernel: rcu:         0-....: (60004 ticks this 
GP) idle=7ca/1/0x4000000000000002 softirq=23094/23094 fqs=14881 
+ Jul 26 20:27:04 marco-MS-7817 kernel: rcu:         0-....: (60004 ticks this 
GP) idle=7ca/1/0x4000000000000002 softirq=23094/23094 fqs=14881
  Jul 26 20:27:04 marco-MS-7817 kernel:         (t=60000 jiffies g=11765 
q=87882)
  Jul 26 20:27:04 marco-MS-7817 kernel: NMI backtrace for cpu 0
  Jul 26 20:27:04 marco-MS-7817 kernel: CPU: 0 PID: 2446 Comm: jackdbus 
Tainted: G           OE     5.4.0-77-lowlatency #86-Ubuntu
  Jul 26 20:27:04 marco-MS-7817 kernel: Hardware name: MSI MS-7817/H81M-E34 
(MS-7817), BIOS V17.5 03/30/2015
  Jul 26 20:27:04 marco-MS-7817 kernel: Call Trace:
  Jul 26 20:27:04 marco-MS-7817 kernel:  <IRQ>
  Jul 26 20:27:04 marco-MS-7817 kernel:  dump_stack+0x6d/0x8b
  Jul 26 20:27:04 marco-MS-7817 kernel:  ? lapic_can_unplug_cpu+0x80/0x80
  Jul 26 20:27:04 marco-MS-7817 kernel:  nmi_cpu_backtrace.cold+0x14/0x53
  Jul 26 20:27:04 marco-MS-7817 kernel:  
nmi_trigger_cpumask_backtrace+0xfa/0x110
  Jul 26 20:27:04 marco-MS-7817 kernel:  
arch_trigger_cpumask_backtrace+0x19/0x20
  Jul 26 20:27:04 marco-MS-7817 kernel:  rcu_dump_cpu_stacks+0x99/0xcb
  Jul 26 20:27:04 marco-MS-7817 kernel:  rcu_sched_clock_irq.cold+0x25e/0x4f0
  Jul 26 20:27:04 marco-MS-7817 kernel:  update_process_times+0x2c/0x60
  Jul 26 20:27:04 marco-MS-7817 kernel:  tick_sched_handle+0x29/0x60
  Jul 26 20:27:04 marco-MS-7817 kernel:  tick_sched_timer+0x3d/0x80
  Jul 26 20:27:04 marco-MS-7817 kernel:  __hrtimer_run_queues+0xf7/0x2c0
  Jul 26 20:27:04 marco-MS-7817 kernel:  ? tick_sched_do_timer+0x60/0x60
  Jul 26 20:27:04 marco-MS-7817 kernel:  hrtimer_interrupt+0x109/0x220
  Jul 26 20:27:04 marco-MS-7817 kernel:  smp_apic_timer_interrupt+0x71/0x170
  Jul 26 20:27:04 marco-MS-7817 kernel:  apic_timer_interrupt+0xf/0x20
  Jul 26 20:27:04 marco-MS-7817 kernel:  </IRQ>
  Jul 26 20:27:04 marco-MS-7817 kernel: RIP: 0010:read_tsc+0x3/0x10
- Jul 26 20:27:04 marco-MS-7817 kernel: Code: 5d c3 90 90 90 90 90 8b 05 66 e0 
80 01 c3 66 0f 1f 84 00 00 00 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 
40 00 0f 01 f9 <66> 90 48 c1 e2 20 48 09 d0 c3 0f 1f 00 8b 0d ea 83 ae 01 48 89 
f8
+ Jul 26 20:27:04 marco-MS-7817 kernel: Code: 5d c3 90 90 90 90 90 8b 05 66 e0 
80 01 c3 66 0f 1f 84 00 00 00 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 
40 00 0f 01 f9 <66> 90 48 c1 e2 20 48 09 d0 c.3 0f 1f 00 8b 0d ea 83 ae 01 48 
89 f8
  Jul 26 20:27:04 marco-MS-7817 kernel: RSP: 0018:ffffb32e40e5bea8 EFLAGS: 
00000246 ORIG_RAX: ffffffffffffff13
  Jul 26 20:27:04 marco-MS-7817 kernel: RAX: 00000000068f6570 RBX: 
ffffb32e40e5bf00 RCX: 0000000000000000
  Jul 26 20:27:04 marco-MS-7817 kernel: RDX: 0000000000000044 RSI: 
000000000000001f RDI: ffffffffaf030ca0
  Jul 26 20:27:04 marco-MS-7817 kernel: RBP: ffffb32e40e5bec8 R08: 
0000000000000000 R09: 0000000000000000
  Jul 26 20:27:04 marco-MS-7817 kernel: R10: 0000000000000000 R11: 
0000000000000000 R12: 0000000000000000
  Jul 26 20:27:04 marco-MS-7817 kernel: R13: 00000000000248f4 R14: 
0000000000000000 R15: 0000000000000000
  Jul 26 20:27:04 marco-MS-7817 kernel:  ? recalibrate_cpu_khz+0x10/0x10
  Jul 26 20:27:04 marco-MS-7817 kernel:  ? ktime_get_ts64+0x4c/0xe0
  Jul 26 20:27:04 marco-MS-7817 kernel:  poll_select_set_timeout+0x50/0x80
  Jul 26 20:27:04 marco-MS-7817 kernel:  __x64_sys_poll+0x97/0x150
  Jul 26 20:27:04 marco-MS-7817 kernel:  do_syscall_64+0x57/0x190
  Jul 26 20:27:04 marco-MS-7817 kernel:  
entry_SYSCALL_64_after_hwframe+0x44/0xa9
  Jul 26 20:27:04 marco-MS-7817 kernel: RIP: 0033:0x7f8d053a4aff
  Jul 26 20:27:04 marco-MS-7817 kernel: Code: 54 24 1c 48 89 74 24 10 48 89 7c 
24 08 e8 79 1c f8 ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 48 8b 7c 24 08 b8 07 
00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2b 44 89 c7 89 44 24 08 e8 ad 1c f8 ff 8b 
44
  Jul 26 20:27:04 marco-MS-7817 kernel: RSP: 002b:00007f8d04626d50 EFLAGS: 
00000246 ORIG_RAX: 0000000000000007
  Jul 26 20:27:04 marco-MS-7817 kernel: RAX: ffffffffffffffda RBX: 
0000000000000002 RCX: 00007f8d053a4aff
  Jul 26 20:27:04 marco-MS-7817 kernel: RDX: 0000000000007cff RSI: 
0000000000000002 RDI: 000055a45ca1eec0
  Jul 26 20:27:04 marco-MS-7817 kernel: RBP: 000000000484ea79 R08: 
0000000000000002 R09: 00007f8d04626d58
  Jul 26 20:27:04 marco-MS-7817 kernel: R10: 00007f8d04626d50 R11: 
0000000000000246 R12: 0000000000000001
  Jul 26 20:27:04 marco-MS-7817 kernel: R13: 0000000000000001 R14: 
00000000ffffffff R15: 000055a45ca86070
  Jul 26 20:27:56 marco-MS-7817 systemd[1]: Starting Ubuntu Advantage APT and 
MOTD Messages...
  Jul 26 20:27:56 marco-MS-7817 systemd[1]: ua-messaging.service: Succeeded.
  Jul 26 20:27:56 marco-MS-7817 systemd[1]: Finished Ubuntu Advantage APT and 
MOTD Messages.
  Jul 26 20:28:00 marco-MS-7817 kernel: usb 5-1.3.4: USB disconnect, device 
number 8
  
  
---------------------------------------------------------------------------------
  
  My system:
  
- System:    Host: marco-MS-7817 Kernel: 5.4.0-80-lowlatency x86_64 bits: 64 
Desktop: Xfce 4.14.2 
-            Distro: Ubuntu 20.04.2 LTS (Focal Fossa) 
- Machine:   Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 serial: 
<superuser/root required> 
-            BIOS: American Megatrends v: 17.5 date: 03/30/2015 
- CPU:       Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP 
L2 cache: 6144 KiB 
-            Speed: 3200 MHz min/max: 800/3200 MHz Core speeds (MHz): 1: 3200 
2: 3200 3: 3201 4: 3201 
- Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated 
Graphics driver: i915 v: kernel 
-            Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: 
fbdev,vesa resolution: 1920x1080~60Hz 
-            OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 
Mesa 20.2.6 
- Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
driver: snd_hda_intel 
-            Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio 
-            Device-3: AKAI Professional M.I. type: USB driver: 
hid-generic,snd-usb-audio,usbhid 
-            Sound Server: ALSA v: k5.4.0-80-lowlatency 
- Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
driver: r8168 
-            IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: 
d8:cb:8a:e8:e9:99 
- Drives:    Local Storage: total: 538.03 GiB used: 219.96 GiB (40.9%) 
-            ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 
232.89 GiB 
-            ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 
size: 232.89 GiB 
-            ID-3: /dev/sdc type: USB vendor: SanDisk model: Ultra size: 57.30 
GiB 
-            ID-4: /dev/sdd type: USB vendor: SanDisk model: U3 Cruzer Micro 
size: 14.95 GiB 
- Partition: ID-1: / size: 36.41 GiB used: 14.84 GiB (40.8%) fs: ext4 dev: 
/dev/sda1 
-            ID-2: /home size: 184.23 GiB used: 116.46 GiB (63.2%) fs: ext4 
dev: /dev/sda6 
-            ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: 
/dev/sda5 
- Sensors:   System Temperatures: cpu: 36.0 C mobo: N/A 
-            Fan Speeds (RPM): N/A 
- Info:      Processes: 227 Uptime: 15m Memory: 7.23 GiB used: 1.39 GiB (19.2%) 
Shell: bash inxi: 3.0.38 
+ System:    Host: marco-MS-7817 Kernel: 5.4.0-80-lowlatency x86_64 bits: 64 
Desktop: Xfce 4.14.2
+            Distro: Ubuntu 20.04.2 LTS (Focal Fossa)
+ Machine:   Type: Desktop Mobo: MSI model: H81M-E34 (MS-7817) v: 3.0 serial: 
<superuser/root required>
+            BIOS: American Megatrends v: 17.5 date: 03/30/2015
+ CPU:       Topology: Quad Core model: Intel Core i5-4460 bits: 64 type: MCP 
L2 cache: 6144 KiB
+            Speed: 3200 MHz min/max: 800/3200 MHz Core speeds (MHz): 1: 3200 
2: 3200 3: 3201 4: 3201
+ Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated 
Graphics driver: i915 v: kernel
+            Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: 
fbdev,vesa resolution: 1920x1080~60Hz
+            OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 
Mesa 20.2.6
+ Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
driver: snd_hda_intel
+            Device-2: BEHRINGER UMC204HD 192k type: USB driver: snd-usb-audio
+            Device-3: AKAI Professional M.I. type: USB driver: 
hid-generic,snd-usb-audio,usbhid
+            Sound Server: ALSA v: k5.4.0-80-lowlatency
+ Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
driver: r8168
+            IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: 
d8:cb:8a:e8:e9:99
+ Drives:    Local Storage: total: 538.03 GiB used: 219.96 GiB (40.9%)
+            ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 
232.89 GiB
+            ID-2: /dev/sdb type: USB vendor: Samsung model: Portable SSD T5 
size: 232.89 GiB
+            ID-3: /dev/sdc type: USB vendor: SanDisk model: Ultra size: 57.30 
GiB
+            ID-4: /dev/sdd type: USB vendor: SanDisk model: U3 Cruzer Micro 
size: 14.95 GiB
+ Partition: ID-1: / size: 36.41 GiB used: 14.84 GiB (40.8%) fs: ext4 dev: 
/dev/sda1
+            ID-2: /home size: 184.23 GiB used: 116.46 GiB (63.2%) fs: ext4 
dev: /dev/sda6
+            ID-3: swap-1 size: 7.45 GiB used: 0 KiB (0.0%) fs: swap dev: 
/dev/sda5
+ Sensors:   System Temperatures: cpu: 36.0 C mobo: N/A
+            Fan Speeds (RPM): N/A
+ Info:      Processes: 227 Uptime: 15m Memory: 7.23 GiB used: 1.39 GiB (19.2%) 
Shell: bash inxi: 3.0.38
  
  Description:  Ubuntu 20.04.2 LTS
  Release:      20.04

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https://bugs.launchpad.net/bugs/1938076

Title:
  sporadic system freeze after log in

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