| 2021-02-25 10:28:10 |
Daniel J Blueman |
bug |
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added bug |
| 2021-02-25 10:30:10 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
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| 2021-02-25 10:53:29 |
Daniel J Blueman |
tags |
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apport-collected focal |
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| 2021-02-25 10:53:30 |
Daniel J Blueman |
description |
At present the Ubuntu 20.04 linux-image-kvm kernel package don't include the tcp_bbr, sch_cake and sch_fq_codel kernel modules. The latter has been default on desktop for a number of release cycles; cake improves on this.
These queueing disciplines are instrumental to reducing queueing latency [bufferbloat.net]; the TCP congestion control algo elevates bandwidth on lossy paths (think clients on radio networks).
Enabling these kernel modules will ensure Ubuntu has an optimally competitive network stack in cloud/VM systems. |
At present the Ubuntu 20.04 linux-image-kvm kernel package don't include the tcp_bbr, sch_cake and sch_fq_codel kernel modules. The latter has been default on desktop for a number of release cycles; cake improves on this.
These queueing disciplines are instrumental to reducing queueing latency [bufferbloat.net]; the TCP congestion control algo elevates bandwidth on lossy paths (think clients on radio networks).
Enabling these kernel modules will ensure Ubuntu has an optimally competitive network stack in cloud/VM systems.
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ProblemType: Bug
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: N/A
CasperMD5CheckResult: skip
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2018-05-18 (1013 days ago)
InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t: Error: command ['lsusb', '-t'] failed with exit code 1: /sys/bus/usb/devices: No such file or directory
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
Package: linux (not installed)
PciMultimedia:
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-1033-kvm root=/dev/sda ro console=ttyS0,19200n8 net.ifnames=0 cgroup_disable=cpuset,cpu,cpuacct,blkio,memory nmi_watchdog=0
ProcVersionSignature: Ubuntu 5.4.0-1033.34-kvm 5.4.86
RelatedPackageVersions:
linux-restricted-modules-5.4.0-1033-kvm N/A
linux-backports-modules-5.4.0-1033-kvm N/A
linux-firmware 1.187.9
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
Tags: focal
Uname: Linux 5.4.0-1033-kvm x86_64
UpgradeStatus: Upgraded to focal on 2020-05-03 (298 days ago)
UserGroups: N/A
_MarkForUpload: True
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-q35-3.1
dmi.modalias: dmi:bvnSeaBIOS:bvrrel-1.12.0-0-ga698c8995f-prebuilt.qemu.org:bd04/01/2014:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-3.1:cvnQEMU:ct1:cvrpc-q35-3.1:
dmi.product.name: Standard PC (Q35 + ICH9, 2009)
dmi.product.version: pc-q35-3.1
dmi.sys.vendor: QEMU |
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| 2021-02-25 10:53:31 |
Daniel J Blueman |
attachment added |
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AudioDevicesInUse.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466961/+files/AudioDevicesInUse.txt |
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| 2021-02-25 10:53:32 |
Daniel J Blueman |
attachment added |
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CurrentDmesg.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466962/+files/CurrentDmesg.txt |
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| 2021-02-25 10:53:33 |
Daniel J Blueman |
attachment added |
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Lspci.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466963/+files/Lspci.txt |
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| 2021-02-25 10:53:35 |
Daniel J Blueman |
attachment added |
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Lspci-vt.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466964/+files/Lspci-vt.txt |
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| 2021-02-25 10:53:36 |
Daniel J Blueman |
attachment added |
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ProcCpuinfo.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466965/+files/ProcCpuinfo.txt |
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| 2021-02-25 10:53:38 |
Daniel J Blueman |
attachment added |
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ProcCpuinfoMinimal.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466966/+files/ProcCpuinfoMinimal.txt |
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| 2021-02-25 10:53:40 |
Daniel J Blueman |
attachment added |
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ProcEnviron.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466967/+files/ProcEnviron.txt |
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| 2021-02-25 10:53:42 |
Daniel J Blueman |
attachment added |
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ProcInterrupts.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466968/+files/ProcInterrupts.txt |
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| 2021-02-25 10:53:44 |
Daniel J Blueman |
attachment added |
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ProcModules.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466969/+files/ProcModules.txt |
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| 2021-02-25 10:53:45 |
Daniel J Blueman |
attachment added |
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UdevDb.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466970/+files/UdevDb.txt |
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| 2021-02-25 10:53:47 |
Daniel J Blueman |
attachment added |
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WifiSyslog.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466971/+files/WifiSyslog.txt |
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| 2021-02-25 10:53:48 |
Daniel J Blueman |
attachment added |
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acpidump.txt https://bugs.launchpad.net/bugs/1916869/+attachment/5466972/+files/acpidump.txt |
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| 2021-02-25 10:54:14 |
Daniel J Blueman |
linux (Ubuntu): status |
Incomplete |
Confirmed |
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