0bda:1724 RTL8723AU No WiFi after reboot

[Nis Wechselberg]

After rebooting the system, the wifi is not initialized correctly.
dmesg lists [ 14.132275] usb 2-5: Firmware failed to start

However, after complete shutdown and startup the chip works just fine.

I was using 14.04 before and this chip has always been kind of dodgy, requiring a kernel module from github for some time.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: enbewe 1685 F.... pulseaudio
 /dev/snd/controlC1: enbewe 1685 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Apr 25 14:34:09 2016
HibernationDevice: RESUME=UUID=ca32a7cb-a574-4faf-9376-ab44bae3ac42
InstallationDate: Installed on 2016-04-22 (2 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: LENOVO 20246
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=dbed3725-2e1c-4a74-8594-6fd4cdb20e21 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-21-generic N/A
 linux-backports-modules-4.4.0-21-generic N/A
 linux-firmware 1.157
SourcePackage: linux
StagingDrivers: r8723au
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/08/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8FCN36WW(V1.03)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Yoga2
dmi.board.vendor: LENOVO
dmi.board.version: 31900003STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad Yoga 11S
dmi.modalias: dmi:bvnLENOVO:bvr8FCN36WW(V1.03):bd10/08/2013:svnLENOVO:pn20246:pvrLenovoIdeaPadYoga11S:rvnLENOVO:rnYoga2:rvr31900003STD:cvnLENOVO:ct10:cvrLenovoIdeaPadYoga11S:
dmi.product.name: 20246
dmi.product.version: Lenovo IdeaPad Yoga 11S
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Leonard Broman (firepiper)]

I'm having similar problems. In 15.10 wifi worked just fine, but after upgrade to 16.04 it does not work at all. I have the same messages in dmesg.

[ 3.487325] usb 2-1.7: Vendor: Realtek
[ 3.487330] usb 2-1.7: Product: 802.11n WLAN Adapter
[ 3.487335] usb 2-1.7: RTL8723AU rev B (TSMC) 1T1R, TX queues 2, WiFi=1, BT=1, GPS=0, HI PA=0
[ 3.487338] usb 2-1.7: RTL8723AU MAC: 24:fd:52:8f:1a:52
[ 3.487341] usb 2-1.7: rtl8xxxu: Loading firmware rtlwifi/rtl8723aufw_B_NoBT.bin
[ 3.491456] usb 2-1.7: Firmware revision 31.0 (signature 0x2302)
[ 3.826305] usb 2-1.7: Firmware failed to start
[ 3.832910] usbcore: registered new interface driver rtl8xxxu
[ 3.845035] r8723au: module is from the staging directory, the quality is unknown, you have been warned.
[ 3.846925] usbcore: registered new interface driver rtl8723au

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.6 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/v4.6-rc6-wily/

[Leonard Broman (firepiper)]

I'm really sorry I did not get a notification when you posted your comment.

Anyway, the issues seems to have been resolved and then reappeared on my machine since.

Update to kernel version 4.4.0-21-generic fixed the issue. But the next update to 4.4.0-22-generic broke it once again. I will test with the 4.6 series kernel, I'll report back when I have.

[Leonard Broman (firepiper)]

Tested with 4.6.0-040600rc7-generic, works fine!

[Nis Wechselberg (webmaster-3457vpxne0)]

Was worried we might be experiencing different bugs. Tested 4.6.0-040600rc7 too and seems to work after reboots.

[Dan Lenski (lenski)]

I've had similar problems with the rtl8xxxu driver and the same hardware:

[ 8.097402] usb 1-1.4: RTL8723AU rev B (TSMC) 1T1R, TX queues 2, WiFi=1, BT=1, GPS=0, HI PA=0

I presume yours is also a Lenovo Yoga 13?

I submitted a small patch to increase the firmware polling delay. This patch appears to resolve the issue for me:

http://thread.gmane.org/gmane.linux.kernel.wireless.general/152169

[Nis Wechselberg (webmaster-3457vpxne0)]

In my case it is a Yoga 11S but they use the same (bad ;() wifi chip.

Thanks for digging into the module and submitting the patch. I hope there is some way this patch finds it way into my system ... not possible for me to build the module myself.

[penalvch (penalvch)]

Nis Wechselberg, could you please confirm the patch addresses your issue following https://wiki.ubuntu.com/Kernel/KernelBisection#Testing_a_newly_released_patch_from_upstream ?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]