Wifi drops out, takes 5 mins to recover

[shinyblue]

My wifi used to be solid, but recently it's started dropping out 2-3 times a day. Looking in the logs the only thing I see that may be relevant is:

Jun 07 11:57:07 laptop kernel: brcmfmac: brcmf_msgbuf_query_dcmd: Timeout on response for query command
Jun 07 11:57:07 laptop kernel: brcmfmac: brcmf_run_escan: error (-5)
Jun 07 11:57:07 laptop kernel: brcmfmac: brcmf_cfg80211_scan: scan error (-5)
Jun 07 11:57:10 laptop kernel: brcmfmac: brcmf_cfg80211_get_station: GET STA INFO failed, -21
Jun 07 11:57:14 laptop kernel: brcmfmac: brcmf_inetaddr_changed: fail to get arp ip table err:-23
Jun 07 11:57:56 laptop kernel: brcmfmac: brcmf_cfg80211_escan_handler: scan not ready, bsscfgidx=0
Jun 07 11:57:56 laptop kernel: brcmfmac: brcmf_fweh_event_worker: event handler failed (69)
Jun 07 11:58:17 laptop kernel: brcmfmac: brcmf_inetaddr_changed: fail to get arp ip table err:-23

I was wondering if it's similar to https://bugzilla.redhat.com/show_bug.cgi?id=1528291

Other info:

$ lspci -vnn | grep -i net
02:00.0 Network controller [0280]: Broadcom Limited BCM43602 802.11ac Wireless LAN SoC [14e4:43ba] (rev 01)

$ lsmod | grep brcmfmac
brcmfmac 315392 0
brcmutil 16384 1 brcmfmac
cfg80211 622592 1 brcmfmac

$ uname -a
Linux laptop 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:15:17 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-firmware 1.173.1
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
Date: Thu Jun 7 12:01:23 2018
Dependencies:

InstallationDate: Installed on 2018-04-07 (61 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180403)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

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 1775583

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.17 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17