This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1916871
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
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the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1916871
Title:
linux-image-virtual package missing key network qdisc/TCP CC modules
Status in linux package in Ubuntu:
Incomplete
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.
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