apport information ** Attachment added: "UdevDb.txt" https://bugs.launchpad.net/bugs/1916871/+attachment/5467001/+files/UdevDb.txt
-- 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/1916871 Title: linux-image-virtual package missing key network qdisc/TCP CC modules Status in linux package in Ubuntu: Confirmed Bug description: At present the Ubuntu 20.04 linux-image-virtual 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. --- ProblemType: Bug AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Feb 25 19:47 seq crw-rw---- 1 root audio 116, 33 Feb 25 19:47 timer 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' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: 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: Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1: MachineType: QEMU Standard PC (Q35 + ICH9, 2009) NonfreeKernelModules: bochs_drm i2c_i801 lpc_ich Package: linux (not installed) PciMultimedia: ProcFB: 0 bochs-drmdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-66-generic root=/dev/sda ro console=ttyS0,19200n8 net.ifnames=0 cgroup_disable=cpuset,cpu,cpuacct,blkio,memory nmi_watchdog=0 ProcVersionSignature: Ubuntu 5.4.0-66.74-generic 5.4.86 RelatedPackageVersions: linux-restricted-modules-5.4.0-66-generic N/A linux-backports-modules-5.4.0-66-generic N/A linux-firmware 1.187.9 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' Tags: focal Uname: Linux 5.4.0-66-generic 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1916871/+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
