Wifi Drops, and SSIDs disappear

Bug #1815332 reported by Dustin Krysak
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

It looks like I am hitting the bug listed at https://bugzilla.kernel.org/show_bug.cgi?id=201853.

My system is a Dell XPS 13 (9350) running Ubuntu 19.04 (daily iso).

I am currently trying the work around listed at that URL:

`sudo iw dev wlp58s0 set power_save off`

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-4.19.0-12-generic 4.19.0-12.13
ProcVersionSignature: Ubuntu 4.19.0-12.13-generic 4.19.18
Uname: Linux 4.19.0-12-generic x86_64
ApportVersion: 2.20.10-0ubuntu20
Architecture: amd64
 /dev/snd/controlC0: dustin 2059 F.... pulseaudio
CurrentDesktop: Budgie:GNOME
Date: Sat Feb 9 23:25:34 2019
InstallationDate: Installed on 2019-02-08 (1 days ago)
InstallationMedia: Ubuntu-Budgie 19.04 "Disco Dingo" - Alpha amd64 (20190207)
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 0c45:670c Microdia
 Bus 001 Device 003: ID 04f3:20d0 Elan Microelectronics Corp.
 Bus 001 Device 002: ID 0a5c:6412 Broadcom Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. XPS 13 9350
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.19.0-12-generic root=/dev/mapper/ubuntu--budgie--vg-root ro quiet splash vt.handoff=1
 linux-restricted-modules-4.19.0-12-generic N/A
 linux-backports-modules-4.19.0-12-generic N/A
 linux-firmware 1.177
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)

dmi.bios.date: 08/31/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.9.0
dmi.board.name: 0JXC1H
dmi.board.vendor: Dell Inc.
dmi.board.version: X00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.9.0:bd08/31/2018:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn0JXC1H:rvrX00:cvnDellInc.:ct9:cvr:
dmi.product.family: NULL
dmi.product.name: XPS 13 9350
dmi.product.sku: 0704
dmi.sys.vendor: Dell Inc.

Revision history for this message
Dustin Krysak (bashfulrobot) wrote :
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote : Status changed to Confirmed

This change was made by a bot.

Changed in linux (Ubuntu):
status: New → Confirmed
Revision history for this message
Kai-Heng Feng (kaihengfeng) wrote :

Seems like it's a regression,
Would it be possible for you to do a kernel bisection?

First, find the last good -rc kernel and the first bad -rc kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/

$ sudo apt build-dep linux
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ cd linux
$ git bisect start
$ git bisect good $(the good version you found)
$ git bisect bad $(the bad version found)
$ make localmodconfig
$ make -j`nproc` deb-pkg
Install the newly built kernel, then reboot with it.
If the issue still happens,
$ git bisect bad
$ git bisect good
Repeat to "make -j`nproc` deb-pkg" until you find the commit that causes the regression.

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