wifi doesn't work after wake up (brcmsmac)

[Tommy_CZ]

wifi doesn't work after wake up (brcmsmac)
macbook air 4,2

ProblemType: Bug
DistroRelease: elementary 0.4
Package: linux-image-4.4.0-36-generic 4.4.0-36.55 [modified: boot/vmlinuz-4.4.0-36-generic] [origin: Ubuntu]
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tomas 1745 F.... pulseaudio
CurrentDesktop: Pantheon
Date: Sat Sep 24 20:30:19 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=f38cd8e2-f431-4560-a708-202f2b60ea6e
InstallationDate: Installed on 2016-09-16 (7 days ago)
InstallationMedia: elementary OS 0.4 "Loki" - Stable amd64 (20160909)
MachineType: Apple Inc. MacBookAir4,2
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-36-generic.efi.signed root=UUID=5c914172-c233-4cba-9778-675b14693fa2 ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-36-generic N/A
 linux-backports-modules-4.4.0-36-generic N/A
 linux-firmware 1.157.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/09/2013
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA41.88Z.0077.B11.1310091428
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-742912EFDBEE19B3
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir4,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-742912EFDBEE19B3
dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B11.1310091428:bd10/09/2013:svnAppleInc.:pnMacBookAir4,2:pvr1.0:rvnAppleInc.:rnMac-742912EFDBEE19B3:rvrMacBookAir4,2:cvnAppleInc.:ct10:cvrMac-742912EFDBEE19B3:
dmi.product.name: MacBookAir4,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[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 v4.8 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/v4.8

[Tommy_CZ (t-kijas)]

With newer upstream kernels, it works much better, but sometimes it still is not present (module) after wake up from suspend to ram.