Same problem here. Reproducable by switching virtual terminals a few times with <ctrl><alt><F#>. The only thing the system responds to is a ping (but no ssh) and a <sysrq>REISUB. This only happens to me on kernel 5.4.0-56-generic. If I revert to the previous kernel, 5.4.0-54-generic, the freeze does not happen.
After every freeze journalctl always shows a SIMD error that seems to cause the freeze. Below are two examples: dec 03 17:23:05 zen kernel: simd exception: 0000 [#1] SMP NOPTI dec 03 17:23:05 zen kernel: CPU: 5 PID: 1195 Comm: Xorg Tainted: G OE 5.4.0-56-generic #62-Ubuntu dec 03 17:23:05 zen kernel: Hardware name: Micro-Star International Co., Ltd. MS-7C52/B450M-A PRO MAX (MS-7C52), BIOS 3.40 01/22/2020 dec 03 17:23:05 zen kernel: RIP: 0010:CalculateDelayAfterScaler.constprop.0+0xb2/0x320 [amdgpu] dec 03 17:23:05 zen kernel: Code: 10 45 b0 f2 45 0f 59 84 24 08 0d 00 00 f2 44 0f 5e 45 d0 f2 48 0f 2a c8 f2 0f 59 c8 66 0f ef c0 f2 41 0f 5a 84 24 60 17 00 00 <f2> 41 0f 5e c8 f2 0f 5c 4d c8 f2 0f 5a c9 e8 7b df f7 ff f2 0f 10 dec 03 17:23:05 zen kernel: RSP: 0018:ffffa135419cf708 EFLAGS: 00010202 dec 03 17:23:05 zen kernel: RAX: 0000000000003c00 RBX: 0000000000000002 RCX: 0000000000000000 dec 03 17:23:05 zen kernel: RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8e2cb16c1f38 dec 03 17:23:05 zen kernel: RBP: ffffa135419cf780 R08: 0000000000000002 R09: 0000000000000f00 dec 03 17:23:05 zen kernel: R10: 0000000000000001 R11: ffff8e2cb16c53b8 R12: ffff8e2cb16c1f38 dec 03 17:23:05 zen kernel: R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 dec 03 17:23:05 zen kernel: FS: 00007f43ee050a80(0000) GS:ffff8e2d6e940000(0000) knlGS:0000000000000000 dec 03 17:23:05 zen kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 dec 03 17:23:05 zen kernel: CR2: 00007fc926c8b3e0 CR3: 00000007e6050000 CR4: 0000000000340ee0 dec 03 17:23:05 zen kernel: Call Trace: and dec 04 06:53:51 zen kernel: simd exception: 0000 [#1] SMP NOPTI dec 04 06:53:51 zen kernel: CPU: 0 PID: 5889 Comm: kworker/0:2 Tainted: G OE 5.4.0-56-generic #62-Ubuntu dec 04 06:53:51 zen kernel: Hardware name: Micro-Star International Co., Ltd. MS-7C52/B450M-A PRO MAX (MS-7C52), BIOS 3.40 01/22/2020 dec 04 06:53:51 zen kernel: Workqueue: events console_callback dec 04 06:53:51 zen kernel: RIP: 0010:CalculateDelayAfterScaler.constprop.0+0xb2/0x320 [amdgpu] dec 04 06:53:51 zen kernel: Code: 10 45 b0 f2 45 0f 59 84 24 08 0d 00 00 f2 44 0f 5e 45 d0 f2 48 0f 2a c8 f2 0f 59 c8 66 0f ef c0 f2 41 0f 5a 84 24 60 17 00 00 <f2> 41 0f 5e c8 f2 0f 5c 4d c8 f2 0f 5a c9 e8 7b df f7 ff f2 0f 10 dec 04 06:53:51 zen kernel: RSP: 0018:ffffad2c42a77618 EFLAGS: 00010202 dec 04 06:53:51 zen kernel: RAX: 0000000000000f00 RBX: 0000000000000002 RCX: 0000000000000000 dec 04 06:53:51 zen kernel: RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9e845b851f38 dec 04 06:53:51 zen kernel: RBP: ffffad2c42a77690 R08: 0000000000000002 R09: 0000000000000f00 dec 04 06:53:51 zen kernel: R10: 0000000000000001 R11: ffff9e845b8553b8 R12: ffff9e845b851f38 dec 04 06:53:51 zen kernel: R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 dec 04 06:53:51 zen kernel: FS: 0000000000000000(0000) GS:ffff9e852e800000(0000) knlGS:0000000000000000 dec 04 06:53:51 zen kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 dec 04 06:53:51 zen kernel: CR2: 000055d78231afd0 CR3: 0000000724648000 CR4: 0000000000340ef0 dec 04 06:53:51 zen kernel: Call Trace: dec 04 06:53:51 zen kernel: dml20v2_ModeSupportAndSystemConfigurationFull+0x403f/0x5d60 [amdgpu] dec 04 06:53:51 zen kernel: dml_get_voltage_level+0x127/0x200 [amdgpu] dec 04 06:53:51 zen kernel: dcn20_fast_validate_bw+0x376/0xaf0 [amdgpu] dec 04 06:53:51 zen kernel: dcn20_validate_bandwidth_internal+0xaf/0x290 [amdgpu] dec 04 06:53:51 zen kernel: ? resource_build_scaling_params+0x709/0x9c0 [amdgpu] dec 04 06:53:51 zen kernel: dcn20_validate_bandwidth+0x31/0x100 [amdgpu] dec 04 06:53:51 zen kernel: dc_validate_global_state+0x260/0x2d0 [amdgpu] dec 04 06:53:51 zen kernel: ? drm_modeset_lock_all_ctx+0xd9/0xe0 [drm] dec 04 06:53:51 zen kernel: amdgpu_dm_atomic_check+0x60c/0x860 [amdgpu] dec 04 06:53:51 zen kernel: drm_atomic_check_only+0x2b1/0x450 [drm] dec 04 06:53:51 zen kernel: drm_atomic_commit+0x18/0x50 [drm] dec 04 06:53:51 zen kernel: drm_client_modeset_commit_atomic+0x1d0/0x1f0 [drm] dec 04 06:53:51 zen kernel: drm_client_modeset_commit_force+0x55/0x160 [drm] dec 04 06:53:51 zen kernel: drm_fb_helper_pan_display+0xcf/0x230 [drm_kms_helper] dec 04 06:53:51 zen kernel: fb_pan_display+0x8c/0x110 dec 04 06:53:51 zen kernel: bit_update_start+0x20/0x50 dec 04 06:53:51 zen kernel: fbcon_switch+0x380/0x550 dec 04 06:53:51 zen kernel: redraw_screen+0xfe/0x270 dec 04 06:53:51 zen kernel: complete_change_console+0x3f/0xe0 dec 04 06:53:51 zen kernel: change_console+0x55/0x90 dec 04 06:53:51 zen kernel: console_callback+0x178/0x190 dec 04 06:53:51 zen kernel: ? pwq_dec_nr_in_flight+0x4e/0xa0 dec 04 06:53:51 zen kernel: process_one_work+0x1eb/0x3b0 dec 04 06:53:51 zen kernel: worker_thread+0x4d/0x400 dec 04 06:53:51 zen kernel: kthread+0x104/0x140 dec 04 06:53:51 zen kernel: ? process_one_work+0x3b0/0x3b0 dec 04 06:53:51 zen kernel: ? kthread_park+0x90/0x90 dec 04 06:53:51 zen kernel: ret_from_fork+0x22/0x40 dec 04 06:53:51 zen kernel: Modules linked in: dm_crypt vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) xt_recent xt_CHECKSUM xt_MASQUERADE ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_tables nfnetlink bridge stp llc snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi amdgpu joydev input_leds snd_seq edac_mce_amd amd_iommu_v2 snd_seq_device kvm_amd snd_timer gpu_sched crct10dif_pclmul ghash_clmulni_intel nls_iso8859_1 snd ttm drm_kms_helper aesni_intel crypto_simd i2c_algo_bit cryptd fb_sys_fops glue_helper syscopyarea sysfillrect soundcore wmi_bmof sysimgblt ccp k10temp mac_hid nf_log_ipv6 ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt nf_log_ipv4 nf_log_common ipt_REJECT nf_reject_ipv4 xt_LOG xt_limit xt_addrtype sch_fq_codel xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter bpfilter kvm nct6775 dec 04 06:53:51 zen kernel: hwmon_vid parport_pc ppdev lp parport drm nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c hid_generic usbhid hid uas usb_storage crc32_pclmul i2c_piix4 r8169 ahci realtek nvme libahci nvme_core wmi gpio_amdpt gpio_generic dec 04 06:53:51 zen kernel: ---[ end trace 140e97c87a208340 ]--- dec 04 06:53:51 zen kernel: RIP: 0010:CalculateDelayAfterScaler.constprop.0+0xb2/0x320 [amdgpu] dec 04 06:53:51 zen kernel: Code: 10 45 b0 f2 45 0f 59 84 24 08 0d 00 00 f2 44 0f 5e 45 d0 f2 48 0f 2a c8 f2 0f 59 c8 66 0f ef c0 f2 41 0f 5a 84 24 60 17 00 00 <f2> 41 0f 5e c8 f2 0f 5c 4d c8 f2 0f 5a c9 e8 7b df f7 ff f2 0f 10 dec 04 06:53:51 zen kernel: RSP: 0018:ffffad2c42a77618 EFLAGS: 00010202 dec 04 06:53:51 zen kernel: RAX: 0000000000000f00 RBX: 0000000000000002 RCX: 0000000000000000 dec 04 06:53:51 zen kernel: RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9e845b851f38 dec 04 06:53:51 zen kernel: RBP: ffffad2c42a77690 R08: 0000000000000002 R09: 0000000000000f00 dec 04 06:53:51 zen kernel: R10: 0000000000000001 R11: ffff9e845b8553b8 R12: ffff9e845b851f38 dec 04 06:53:51 zen kernel: R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 dec 04 06:53:51 zen kernel: FS: 0000000000000000(0000) GS:ffff9e852e800000(0000) knlGS:0000000000000000 dec 04 06:53:51 zen kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 dec 04 06:53:51 zen kernel: CR2: 000055d78231afd0 CR3: 0000000724648000 CR4: 0000000000340ef0 dec 04 06:54:16 zen kernel: usb 1-2: USB disconnect, device number 2 dec 04 06:54:16 zen kernel: usb 1-2.3: USB disconnect, device number 3 dec 04 06:54:16 zen kernel: usb 1-2.4: USB disconnect, device number 4 dec 04 06:54:16 zen acpid[859]: input device has been disconnected, fd 14 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-graphics-drivers-440 in Ubuntu. https://bugs.launchpad.net/bugs/1906449 Title: [nvidia] [amdgpu] Xorg randomly freezes Status in nvidia-graphics-drivers-440 package in Ubuntu: New Status in xfce4 package in Ubuntu: New Status in xorg-server package in Ubuntu: New Status in xserver-xorg-video-amdgpu package in Ubuntu: New Bug description: Initially, I thought it only happened during file transfers (because that's when it happens most often), but I later found that it can happen at any time, because I just turned my computer on, went to go make a coffee, have a cigarette, and when I came back, the entire screen, desktop, system, etc had frozen again. I always need to hold the power button down to do an emergency restart, because I can't even use Alt+F# to get into the TTY. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73 Uname: Linux 5.4.0-56-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.suspend: suspend hibernate resume .proc.driver.nvidia.suspend_depth: default modeset uvm .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.95.01 Thu May 28 07:03:08 UTC 2020 GCC version: gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04) ApportVersion: 2.20.11-0ubuntu27.13 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: XFCE Date: Tue Dec 1 12:28:44 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu DkmsStatus: nvidia, 440.95.01, 5.4.0-56-generic, x86_64: installed ExtraDebuggingInterest: Yes GpuHangFrequency: Continuously GpuHangReproducibility: Seems to happen randomly GpuHangStarted: Immediately after installing this version of Ubuntu GraphicsCard: NVIDIA Corporation TU106 [GeForce RTX 2060] [10de:1f15] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:1e21] Advanced Micro Devices, Inc. [AMD/ATI] Renoir [1002:1636] (rev f0) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Renoir [1043:1e21] InstallationDate: Installed on 2020-12-01 (0 days ago) InstallationMedia: Xubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) MachineType: ASUSTeK COMPUTER INC. TUF Gaming FA506IV_TUF506IV ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-56-generic root=UUID=11577769-570c-4297-a9b2-35fb3a30f6bf ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/02/2020 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: FA506IV.309 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: FA506IV dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrFA506IV.309:bd07/02/2020:svnASUSTeKCOMPUTERINC.:pnTUFGamingFA506IV_TUF506IV:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnFA506IV:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.family: TUF Gaming FA506IV dmi.product.name: TUF Gaming FA506IV_TUF506IV dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. nvidia-settings: ERROR: Unable to load info from any available system ERROR: Unable to load info from any available system version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.6 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-440/+bug/1906449/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp