10ec:b723 [HP Notebook - 15-af008ax] Wifi unstable and unresponsive

[soumyajyoti]

The connections are not shown in the Network Manager. After a long wait though the Network manager shows up but the SSID but doesn't connect when chosen. Even if sometimes it connects it is very slow, unstable and eventually disconnects.
I have installed new drivers @https://github.com/lwfinger/rtlwifi_new but to no avail.
I have also changed the mode of the router to b,b/g,g operating at 20 MHz from b/g/n operation at 40Mhz .
I am attaching the Wireless script details herewith.

Point to be noted the Network Manager works well with the WiFi Network of my LAVA df800 CDMA Rev b dongle.
The router is working fine with 3 other systems(Android/Windows/Linux Mint).

The Router is a TP-Link TL-WR720N:
Firmware Version: 4.19.56 Build 141118 Rel.60082n
Hardware Version: WR720N 2.0 00000000

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: soumyajyoti 1257 F.... pulseaudio
 /dev/snd/controlC0: soumyajyoti 1257 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Nov 13 22:49:21 2015
HibernationDevice: RESUME=UUID=32bbfbc8-d105-43a2-97d8-e6026bffbdab
InstallationDate: Installed on 2015-11-11 (1 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Hewlett-Packard HP Notebook
ProcFB:
 0 radeondrmfb
 1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=79ea6210-b7e1-4a35-b0e5-741b260fabf5 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-18-generic N/A
 linux-backports-modules-4.2.0-18-generic N/A
 linux-firmware 1.149.2
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/13/2015
dmi.bios.vendor: Insyde
dmi.bios.version: F.13
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 80CC
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 99.35
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.13:bd08/13/2015:svnHewlett-Packard:pnHPNotebook:pvrType1ProductConfigId:rvnHewlett-Packard:rn80CC:rvr99.35:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Notebook
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: Hewlett-Packard

[Brad Figg (brad-figg)]

This change was made by a bot.

[soumyajyoti (soumyajyoti-bhadra-gmail)]

The computer model is HP 15-af008AX

[Alan Thompson (keys84)]

Same issue

HP 15-ac106na

tried rtlwifi_new driver also

contacted realtek and was given a driver but could not get it to compile, (NOOB)

will attach driver in hopes it helps

[Alan Thompson (keys84)]

Also to add I am using Kubuntu 15.04 Kernel 4.2.6

tried 3.19, 4.2, 4.3 and they all have this issue too

will provide more info if required.

[penalvch (penalvch)]

Alan Thompson, it will help immensely if you filed a new report via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

[penalvch (penalvch)]

soumyajyoti, could you please test the latest upstream kernel available from the very top line at the top of the page from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for testing, and please do not test the daily folder)? Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow additional upstream developers to examine the issue.

If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, Y, and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream.

Once testing of the latest upstream kernel is complete, please mark this report's Status as Confirmed. Please let us know your results.

Thank you for your understanding.

[penalvch (penalvch)]

soumyajyoti, could you please not add [RTL8723BE] to the title? This minimizes the confusion for folks with different hardware that uses the same driver, but have different root causes.

Despite this, as there is a firmware component to this device, could you please test for this via http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?

[penalvch (penalvch)]

soumyajyoti, this report is not in any way a security issue. Hence, please don't toggle the security status.

[soumyajyoti (soumyajyoti-bhadra-gmail)]

Hello Christopher,
Tested with the Xenial Xerus Daily Build.The issue exists in Xenial.

[penalvch (penalvch)]

soumyajyoti, could you please test with the latest mainline kernel (4.4-rc3) and advise to the results?

[soumyajyoti (soumyajyoti-bhadra-gmail)]

HI Christopher,
Problem exists with mainline kernel (4.4-rc4)

[soumyajyoti (soumyajyoti-bhadra-gmail)]

Router Details:
Manufacturer:TP-Link
Model:TL-WR720N
Firmware Version: 4.19.56 Build 141118 Rel.60082n
Hardware Version: WR720N 2.0 00000000

[penalvch (penalvch)]

soumyajyoti, the issue you are reporting is an upstream one. Could you please report this problem following the instructions verbatim at https://wiki.ubuntu.com/Bugs/Upstream/kernel to the appropriate mailing list? As per this and modinfo, TO Realtek WlanFAE, PageHe, and Larry Finger, and CC linux-wireless.

Please provide a direct URL to your post to the mailing list when it becomes available so that it may be tracked.

Thank you for your understanding.