apport information
** Tags added: apport-collected focal
** Description changed:
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.
+ 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-firmware1.187.9
+ 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
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1916871/+attachment/5466993/+files/CurrentDmesg.txt
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https://bugs.launchpad.net/bugs/1916871
Title:
linux-image-virtual package missing key network qdisc/TCP CC modules
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