apport information ** Tags added: apport-collected focal
** Description changed: 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. + Enabling these kernel modules will ensure Ubuntu has an optimally competitive network stack in cloud/VM systems. + --- + 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 ** Attachment added: "AudioDevicesInUse.txt" https://bugs.launchpad.net/bugs/1916869/+attachment/5466961/+files/AudioDevicesInUse.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1916869 Title: linux-image-kvm package missing key network qdisc/TCP CC modules To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1916869/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
