I am having a problem I have elaborated on different forms without resolution. In summary, under a high CPU load, a process I see on “top” irq/139-nvidia that goes up to 100% CPU load (on a 12 core system). As a consequence, the system becomes totally unresponsive. I cannot even get to console mode (alt-cntrl-f7). I am not sure how to properly reproduce it - although it occurs on a daily basis. It occurs most reproducibly when I run scientific software over many cores (Phenix for crystallography for example) and switch between different apps (Brave/Zoom/Skype).
For more details I have written about this problem here:
System: Host: medsciradhoping Kernel: 5.4.0-37-generic x86_64 bits: 64 Desktop: Gnome 3.36.2
Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine: Type: Desktop System: Gigabyte product: X570 AORUS PRO WIFI v: -CF
Mobo: Gigabyte model: X570 AORUS PRO WIFI
UEFI [Legacy]: American Megatrends v: F11 date: 12/06/2019
CPU: Topology: 12-Core model: AMD Ryzen 9 3900X bits: 64 type: MT MCP L2 cache: 6144 KiB
Speed: 2201 MHz min/max: 2200/3800 MHz Core speeds (MHz): 1: 2192 2: 2190 3: 2196
4: 2194 5: 2190 6: 2187 7: 2195 8: 2196 9: 2195 10: 2185 11: 2192 12: 2189 13: 2194
14: 2195 15: 2196 16: 2194 17: 2186 18: 2196 19: 2195 20: 2196 21: 2197 22: 2197
23: 2197 24: 2191
Graphics: Device-1: NVIDIA TU106 [GeForce RTX 2060 SUPER] driver: nvidia v: 440.64
Display: x11 server: X.Org 1.20.8 driver: nvidia
unloaded: fbdev,modesetting,nouveau,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: GeForce RTX 2060 SUPER/PCIe/SSE2 v: 4.6.0 NVIDIA 440.64
Audio: Device-1: NVIDIA TU106 High Definition Audio driver: snd_hda_intel
Device-2: AMD Starship/Matisse HD Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.4.0-37-generic
Network: Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi
IF: wlp4s0 state
Device-2: Intel I211 Gigabit Network driver: igb
IF: enp5s0 state: up speed: 1000 Mbps duplex
Drives: Local Storage: total: 931.51 GiB used: 191.63 GiB (20.6%)
ID-1: /dev/nvme0n1 vendor: Sabrent model: Rocket 4.0 1TB size: 931.51 GiB
Partition: ID-1: / size: 915.40 GiB used: 191.63 GiB (20.9%) fs: ext4 dev: /dev/nvme0n1p5
Sensors: System Temperatures: cpu: 53.2 C mobo: N/A gpu: nvidia temp: 31 C
Fan Speeds (RPM): N/A gpu: nvidia fan: 41%
Info: Processes: 548 Uptime: 23m Memory: 31.37 GiB used: 4.29 GiB (13.7%) Shell: bash
inxi: 3.0.38
$ apt search nvidia-driver | fgrep 'installed'
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
nvidia-driver-440/focal,now 440.82+really.440.64-0ubuntu6 amd64 [installed]
xserver-xorg-video-nvidia-440/focal,now 440.82+really.440.64-0ubuntu6 amd64 [installed,automatic]