There is an interesting (to me, anyway) change of behaviour with the -17 kernel: while earlier kernels would appear to be locked solid for 30-60 seconds before the screen could update, -17 allows screen updates every six seconds or so.
I have an always-running mosh session to a remote host running irssi. This session has a clock that updates every second. When this problem strikes I can glance at this clock and by watching the time jumps, gauge how long the hangs are. When the -17 kernel hangs during these events, this clock updates roughly every six seconds: eg on seconds 36, 42, 48, 54, 00, 06, 13, 19, 25, 31, 37, 43, 50, 56.. The system is by no means usable during this time, but it is interesting that enough userspace ran for mosh to accept packets and redraw the urxvt terminal, and xorg to update the screen. My most recent hang happened while firefox loaded https://www.google.com/maps/place/20%C2%B054'35.7%22S+55%C2%B035'05.0%22E/@-20.9099167,55.5826253,2281m/data=!3m2!1e3!4b1!4m5!3m4!1s0x0:0x0!8m2!3d-20.90991!4d55.58471 but it might be the case that this is just what pushed my browser over the edge, after loading several pages of google docs content and a PDF. Thanks -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1861359 Title: swap storms kills interactive use Status in linux package in Ubuntu: Confirmed Bug description: Hello, several times since upgrading to focal from 19.04 I've found my computer entirely unresponsive for periods of twenty or thirty seconds. No mouse movement, no keyboard input, the screen output does not change. My computer was using swap space and despite very slow writeout speeds well below what the NVME drive can handle, the computer was unusable. I've captured some vmstat 1 output and top output that I started collecting during the event. (Normally one very long painful period is followed by several shorter periods of uselessness.) Thanks ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-12-generic 5.4.0-12.15 ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8 Uname: Linux 5.4.0-12-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu15 Architecture: amd64 Date: Wed Jan 29 23:44:05 2020 ProcEnviron: TERM=rxvt-unicode-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed-5.4 UpgradeStatus: Upgraded to focal on 2020-01-24 (5 days ago) --- ProblemType: Bug AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-12-generic. ApportVersion: 2.20.11-0ubuntu16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sarnold 2734 F.... pulseaudio /dev/snd/controlC1: sarnold 2734 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0x2fe1028000 irq 145' Mixer name : 'Realtek ALC285' Components : 'HDA:10ec0285,17aa225c,00100002 HDA:8086280b,80860101,00100000' Controls : 53 Simple ctrls : 15 Card1.Amixer.info: Card hw:1 'Audio'/'Generic ThinkPad Dock USB Audio at usb-0000:00:14.0-4.2.4, high speed' Mixer name : 'USB Mixer' Components : 'USB17ef:306f' Controls : 9 Simple ctrls : 4 DistroRelease: Ubuntu 20.04 HibernationDevice: RESUME=none IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: LENOVO 20KHCTO1WW NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair Package: linux (not installed) ProcEnviron: TERM=rxvt-unicode-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu@/vmlinuz-5.4.0-12-generic root=ZFS=rpool/ROOT/ubuntu ro root=ZFS=rpool/ROOT/ubuntu quiet splash acpi_osi=! "acpi_osi=Windows 2015" vt.handoff=1 ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8 RelatedPackageVersions: linux-restricted-modules-5.4.0-12-generic N/A linux-backports-modules-5.4.0-12-generic N/A linux-firmware 1.185 Tags: focal Uname: Linux 5.4.0-12-generic x86_64 UpgradeStatus: Upgraded to focal on 2020-01-24 (5 days ago) UserGroups: adm cdrom libvirt lpadmin plugdev sambashare sbuild sudo _MarkForUpload: True dmi.bios.date: 11/25/2019 dmi.bios.vendor: LENOVO dmi.bios.version: N23ET69W (1.44 ) dmi.board.asset.tag: Not Available dmi.board.name: 20KHCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN23ET69W(1.44):bd11/25/2019:svnLENOVO:pn20KHCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KHCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 6th dmi.product.name: 20KHCTO1WW dmi.product.sku: LENOVO_MT_20KH_BU_Think_FM_ThinkPad X1 Carbon 6th dmi.product.version: ThinkPad X1 Carbon 6th dmi.sys.vendor: LENOVO --- ProblemType: Bug AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-12-generic. ApportVersion: 2.20.11-0ubuntu16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sarnold 2734 F.... pulseaudio /dev/snd/controlC1: sarnold 2734 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0x2fe1028000 irq 145' Mixer name : 'Realtek ALC285' Components : 'HDA:10ec0285,17aa225c,00100002 HDA:8086280b,80860101,00100000' Controls : 53 Simple ctrls : 15 Card1.Amixer.info: Card hw:1 'Audio'/'Generic ThinkPad Dock USB Audio at usb-0000:00:14.0-4.2.4, high speed' Mixer name : 'USB Mixer' Components : 'USB17ef:306f' Controls : 9 Simple ctrls : 4 DistroRelease: Ubuntu 20.04 HibernationDevice: RESUME=none IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: LENOVO 20KHCTO1WW NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair Package: linux (not installed) ProcEnviron: TERM=rxvt-unicode-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu@/vmlinuz-5.4.0-12-generic root=ZFS=rpool/ROOT/ubuntu ro root=ZFS=rpool/ROOT/ubuntu quiet splash acpi_osi=! "acpi_osi=Windows 2015" vt.handoff=1 ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8 RelatedPackageVersions: linux-restricted-modules-5.4.0-12-generic N/A linux-backports-modules-5.4.0-12-generic N/A linux-firmware 1.185 Tags: focal Uname: Linux 5.4.0-12-generic x86_64 UpgradeStatus: Upgraded to focal on 2020-01-24 (5 days ago) UserGroups: adm cdrom libvirt lpadmin plugdev sambashare sbuild sudo _MarkForUpload: True dmi.bios.date: 11/25/2019 dmi.bios.vendor: LENOVO dmi.bios.version: N23ET69W (1.44 ) dmi.board.asset.tag: Not Available dmi.board.name: 20KHCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN23ET69W(1.44):bd11/25/2019:svnLENOVO:pn20KHCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KHCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 6th dmi.product.name: 20KHCTO1WW dmi.product.sku: LENOVO_MT_20KH_BU_Think_FM_ThinkPad X1 Carbon 6th dmi.product.version: ThinkPad X1 Carbon 6th dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861359/+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
