[SOLVED]TP-WN725N wifi-adapter no signal[Jessie 8.6]

[willmaster]

I have bought a new TP-WN725N wireless adapter which uses realtek 8188eu driver.The device is clearly recognized but the problem is the network range shown in all networks is 0%. I have installed the firmware-realtek[non-free] from the official repositories and also I have tried the driver from thehttps://github.com/lwfinger/rtl8188eu both drivers successfully recognizes the device but no network range.By no network range I mean it shows some available wifi networks with no signal and it doesn't connect to them.

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rahul@debian:~$ lsusb
Bus 002 Device 002: ID 5986:01a2 Acer, Inc 
Bus 002 Device 003: ID 0bda:8179 Realtek Semiconductor Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 413c:8140 Dell Computer Corp. Wireless 360 Bluetooth
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

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dmesg
[ 1503.812281] usb 2-3: new high-speed USB device number 3 using ehci-pci
[ 1503.945085] usb 2-3: New USB device found, idVendor=0bda, idProduct=8179
[ 1503.945093] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1503.945098] usb 2-3: Product: 802.11n NIC
[ 1503.945102] usb 2-3: Manufacturer: Realtek
[ 1503.945106] usb 2-3: SerialNumber: 00E04C0001
[ 1505.344088] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0)
[ 1505.377420] EEPROM ID = 0x8129
[ 1505.378356] usbcore: registered new interface driver r8188eu
[ 1505.417777] r8188eu 2-3:1.0: firmware: direct-loading firmware rtlwifi/rtl8188eufw.bin
[ 1505.417803] R8188EU: Firmware Version 11, SubVersion 1, Signature 0x88e1
[ 1505.837772] MAC Address = 98:de:d0:1d:3b:f6
[ 1505.843177] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
[ 1505.850815] R8188EU: INFO indicate disassoc
[ 1505.852739] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
[ 1507.203564] R8188EU: INFO indicate disassoc
[ 1529.007731] r8188eu 2-3:1.0: firmware: direct-loading firmware rtlwifi/rtl8188eufw.bin
[ 1976.352030] R8188EU: INFO indicate disassoc
[ 1979.528220] R8188EU: INFO indicate disassoc
[ 1982.496025] R8188EU: INFO indicate disassoc
[ 1985.468035] R8188EU: INFO indicate disassoc

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rahul@debian:~$ lsmod
Module                  Size  Used by
8188eu                696522  0 
cpuid                  12663  0 
bnep                   17431  2 
nfsd                  262938  2 
auth_rpcgss            51209  1 nfsd
oid_registry           12419  1 auth_rpcgss
nfs_acl                12511  1 nfsd
nfs                   192232  0 
lockd                  83389  2 nfs,nfsd
fscache                45542  1 nfs
sunrpc                237364  6 nfs,nfsd,auth_rpcgss,lockd,nfs_acl
uvcvideo               79005  0 
ecb                    12737  1 
btusb                  29721  0 
videobuf2_vmalloc      12816  1 uvcvideo
videobuf2_memops       12519  1 videobuf2_vmalloc
videobuf2_core         47787  1 uvcvideo
v4l2_common            12995  1 videobuf2_core
videodev              126451  3 uvcvideo,v4l2_common,videobuf2_core
media                  18305  2 uvcvideo,videodev
dell_wmi               12477  0 
bluetooth             374429  21 bnep,btusb
sparse_keymap          12818  1 dell_wmi
dell_laptop            17077  0 
dcdbas                 13313  1 dell_laptop
iTCO_wdt               12831  0 
iTCO_vendor_support    12649  1 iTCO_wdt
joydev                 17063  0 
snd_hda_codec_conexant    17841  1 
serio_raw              12849  0 
snd_hda_codec_generic    63181  1 snd_hda_codec_conexant
6lowpan_iphc           16588  1 bluetooth
arc4                   12536  2 
coretemp               12820  0 
ath9k                  90245  0 
ath9k_common           21746  1 ath9k
ath9k_hw              391172  2 ath9k_common,ath9k
kvm_intel             139116  0 
kvm                   392862  1 kvm_intel
ath                    26067  3 ath9k_common,ath9k,ath9k_hw
mac80211              482315  1 ath9k
cfg80211              413730  4 ath,ath9k_common,ath9k,mac80211
pcspkr                 12595  0 
rfkill                 18867  6 cfg80211,bluetooth,dell_laptop
i2c_i801               16965  0 
snd_hda_intel          26407  4 
snd_hda_controller     26646  1 snd_hda_intel
lpc_ich                20768  0 
mfd_core               12601  1 lpc_ich
snd_hda_codec         104500  4 snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              13148  1 snd_hda_codec
snd_pcm                88662  3 snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_timer              26668  1 snd_pcm
evdev                  17445  13 
battery                13356  0 
shpchp                 31121  0 
snd                    65338  15 snd_hwdep,snd_timer,snd_hda_codec_conexant,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
soundcore              13026  2 snd,snd_hda_codec
ac                     12715  0 
acpi_cpufreq           17218  1 
processor              28221  3 acpi_cpufreq
vmhgfs                 65266  0 
vmw_vmci               55383  1 vmhgfs
fuse                   83350  1 
parport_pc             26300  0 
ppdev                  16782  0 
lp                     17074  0 
parport                35749  3 lp,ppdev,parport_pc
autofs4                35529  2 
ext4                  477942  2 
crc16                  12343  2 ext4,bluetooth
mbcache                17171  1 ext4
jbd2                   82514  1 ext4
sd_mod                 44356  4 
crc_t10dif             12431  1 sd_mod
crct10dif_generic      12581  1 
sg                     29973  0 
crct10dif_common       12356  2 crct10dif_generic,crc_t10dif
sr_mod                 21903  0 
cdrom                  47424  1 sr_mod
ahci                   33334  3 
libahci                27158  1 ahci
psmouse                99249  0 
libata                177508  2 ahci,libahci
scsi_mod              191405  4 sg,libata,sd_mod,sr_mod
firewire_ohci          39523  0 
firewire_core          56665  1 firewire_ohci
crc_itu_t              12347  1 firewire_core
sdhci_pci              22097  0 
sdhci                  35161  1 sdhci_pci
r8169                  68262  0 
mii                    12675  1 r8169
mmc_core              102374  2 sdhci,sdhci_pci
thermal                17559  0 
wmi                    17339  1 dell_wmi
i915                  841331  2 
button                 12944  1 i915
i2c_algo_bit           12751  1 i915
drm_kms_helper         49210  1 i915
video                  18096  1 i915
uhci_hcd               43499  0 
drm                   249998  4 i915,drm_kms_helper
ehci_pci               12512  0 
i2c_core               46012  7 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,v4l2_common,videodev
ehci_hcd               69837  1 ehci_pci
thermal_sys            27642  3 video,thermal,processor
usbcore               195468  6 btusb,uhci_hcd,uvcvideo,ehci_hcd,ehci_pci,8188eu
usb_common             12440  1 usbcore

Any help is highly appreciated.

[Dai_trying]

I had problems with my realtek8192CU dropping connections and needed to install a fixed firmware, I got mine from github here and it doesn't state your chip exactly, but it seems to also support RTL8188CUS, RTL8188CE-VAU and RTL8188RU, but likr the readme says it can be "hit and miss". Might be worth looking into, or there could be another fix for you exact card but a cursory google didn't return it.
I did find this ubuntu fix which could work, although I think it uses the same repo for the driver as you already tried, but in the comments there are some extra steps you might take to get it working.

[willmaster]

Thank you for your time and suggestion,but the situation is same and I have tried most of the options on that site but all in vain.
But somehow the device is working in Xubuntu 16.10 in live medium.Below are the details of the module:

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xubuntu@xubuntu:~$ modinfo r8188eu
filename:       /lib/modules/4.8.0-22-generic/kernel/drivers/staging/rtl8188eu/r8188eu.ko
version:        v4.1.4_6773.20130222
author:         Realtek Semiconductor Corp.
description:    Realtek Wireless Lan Driver
license:        GPL
srcversion:     C6125B968E6517D65F8268B
alias:          usb:v0DF6p0076d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p3311d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p3310d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p330Fd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v07B8p8179d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v056Ep4008d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp0179d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8179d*dc*dsc*dp*ic*isc*ip*in*
depends:        cfg80211
staging:        Y
intree:         Y
vermagic:       4.8.0-22-generic SMP mod_unload modversions 
parm:           rtw_ips_mode:The default IPS mode (int)
parm:           ifname:The default name to allocate for first interface (charp)
parm:           if2name:The default name to allocate for second interface (charp)
parm:           rtw_initmac:charp
parm:           rtw_channel_plan:int
parm:           rtw_chip_version:int
parm:           rtw_rfintfs:int
parm:           rtw_lbkmode:int
parm:           rtw_network_mode:int
parm:           rtw_channel:int
parm:           rtw_wmm_enable:int
parm:           rtw_vrtl_carrier_sense:int
parm:           rtw_vcs_type:int
parm:           rtw_busy_thresh:int
parm:           rtw_ht_enable:int
parm:           rtw_cbw40_enable:int
parm:           rtw_ampdu_enable:int
parm:           rtw_rx_stbc:int
parm:           rtw_ampdu_amsdu:int
parm:           rtw_lowrate_two_xmit:int
parm:           rtw_rf_config:int
parm:           rtw_power_mgnt:int
parm:           rtw_smart_ps:int
parm:           rtw_low_power:int
parm:           rtw_wifi_spec:int
parm:           rtw_antdiv_cfg:int
parm:           rtw_antdiv_type:int
parm:           rtw_enusbss:int
parm:           rtw_hwpdn_mode:int
parm:           rtw_hwpwrp_detect:int
parm:           rtw_hw_wps_pbc:int
parm:           rtw_max_roaming_times:The max roaming times to try (uint)
parm:           rtw_fw_iol:FW IOL (int)
parm:           rtw_mc2u_disable:int
parm:           rtw_80211d:Enable 802.11d mechanism (int)
parm:           rtw_notch_filter:0:Disable, 1:Enable, 2:Enable only for P2P (uint)
parm:           debug:Set debug level (1-9) (default 1) (int)
parm:           monitor_enable:Enable monitor inferface (default: false) (bool)
xubuntu@xubuntu:~$ 

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dmesg
[   23.421519] r8188eu: module is from the staging directory, the quality is unknown, you have been warned.
[   23.424428] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0)
[   23.496473] usbcore: registered new interface driver r8188eu
[   23.586595] r8188eu 2-2:1.0 wlx98ded01d3bf6: renamed from wlan0
[   23.686880] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   23.686883] Bluetooth: BNEP filters: protocol multicast
[   23.686888] Bluetooth: BNEP socket layer initialized
[   24.774390] IPv6: ADDRCONF(NETDEV_UP): wlx98ded01d3bf6: link is not ready
[   25.560555] MAC Address = 98:de:d0:1d:3b:f6
[   25.564236] IPv6: ADDRCONF(NETDEV_UP): wlx98ded01d3bf6: link is not ready
[   25.568612] IPv6: ADDRCONF(NETDEV_UP): wlp12s0: link is not ready
[   25.583576] IPv6: ADDRCONF(NETDEV_UP): wlp12s0: link is not ready
[   25.589729] IPv6: ADDRCONF(NETDEV_UP): enp9s0: link is not ready
[   25.657531] r8169 0000:09:00.0 enp9s0: link down
[   25.657672] IPv6: ADDRCONF(NETDEV_UP): enp9s0: link is not ready
[   25.920907] IPv6: ADDRCONF(NETDEV_UP): wlp12s0: link is not ready
[   25.938915] IPv6: ADDRCONF(NETDEV_UP): wlx98ded01d3bf6: link is not ready
[  231.235404] R8188EU: ERROR assoc success
[  231.235504] IPv6: ADDRCONF(NETDEV_CHANGE): wlx98ded01d3bf6: link becomes ready

Is there anyway I can back-port the same driver to Debian Jessie ?

[4D696B65]

Is there anyway I can back-port the same driver to Debian Jessie ?

Xubuntu 16.10 uses kernel 4.8 which in turn has a newer driver than the one in Jessies kernel 3.16
You could try using a newer kernel and firmware from jessie backports.

[Dai_trying]

I have to agree, I would use the backported kernel (I have to on my new laptop to get everything working properly) and wireless drivers if available too.

[willmaster]

Well I have back-ported to 4.7 and I have to install the firmware-realtek from Jessie-backports,the adapter is working fine but I am getting this error failed to load kernel modules at the starting of new kernel see the code:

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rahul@debian:~$ systemctl status systemd-modules-load.service
● systemd-modules-load.service - Load Kernel Modules
   Loaded: loaded (/lib/systemd/system/systemd-modules-load.service; static)
   Active: failed (Result: exit-code) since Thu 2016-12-01 09:54:59 IST; 5min ago
     Docs: man:systemd-modules-load.service(8)
           man:modules-load.d(5)
  Process: 293 ExecStart=/lib/systemd/systemd-modules-load (code=exited, status=1/FAILURE)
 Main PID: 293 (code=exited, status=1/FAILURE)
rahul@debian:~$ cd /etc/modules-load.d/
rahul@debian:/etc/modules-load.d$ ls
cups-filters.conf  modules.conf
rahul@debian:/etc/modules-load.d$ cat cups-filters.conf 
# Parallel printer driver modules loading for cups
# LOAD_LP_MODULE was 'yes' in /etc/default/cups
#lp
#ppdev
#parport_pc
rahul@debian:/etc/modules-load.d$ cat modules.conf 
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.

rahul@debian:/etc/modules-load.d$ cd /usr/lib/modules-load.d/
rahul@debian:/usr/lib/modules-load.d$ ls
rahul@debian:/usr/lib/modules-load.d$ 

I have commented out lp,ppdev,parport_pc as I am not using any printer but still the same error.Any suggestions.

[Head_on_a_Stick]

What is the output of:

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# journalctl -u systemd-modules-load.service

[willmaster]

What is the output of:

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# journalctl -u systemd-modules-load.service

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rahul@debian:~$ journalctl -u systemd-modules-load.service
No journal files were found.
rahul@debian:~$ sudo journalctl -u systemd-modules-load.service
[sudo] password for rahul: 
-- Logs begin at Thu 2016-12-01 14:04:41 IST, end at Thu 2016-12-01 14:10:22 IST
Dec 01 14:04:44 debian systemd[1]: Starting Load Kernel Modules...
Dec 01 14:04:44 debian systemd[1]: systemd-modules-load.service: main process ex
Dec 01 14:04:44 debian systemd[1]: Failed to start Load Kernel Modules.
Dec 01 14:04:44 debian systemd[1]: Unit systemd-modules-load.service entered fai
lines 1-5/5 (END)...skipping...
-- Logs begin at Thu 2016-12-01 14:04:41 IST, end at Thu 2016-12-01 14:10:22 IST. --
Dec 01 14:04:44 debian systemd[1]: Starting Load Kernel Modules...
Dec 01 14:04:44 debian systemd[1]: systemd-modules-load.service: main process exited, code=exited, status=1/FAILURE
Dec 01 14:04:44 debian systemd[1]: Failed to start Load Kernel Modules.
Dec 01 14:04:44 debian systemd[1]: Unit systemd-modules-load.service entered failed state.

[willmaster]

The issue is resolved after checking the details of the process given by the pid I found out that it was trying to load vmghfs which is a module of the package open-vm-tools-dkms.As I am not using any virtual machine so I removed that package and now everything is good with no errors.

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rahul@debian:~$ systemctl status -l systemd-modules-load.service
● systemd-modules-load.service - Load Kernel Modules
   Loaded: loaded (/lib/systemd/system/systemd-modules-load.service; static)
   Active: active (exited) since Thu 2016-12-01 19:46:46 IST; 3min 9s ago
     Docs: man:systemd-modules-load.service(8)
           man:modules-load.d(5)
  Process: 183 ExecStart=/lib/systemd/systemd-modules-load (code=exited, status=0/SUCCESS)
 Main PID: 183 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/systemd-modules-load.service

To check the module that is causing the trouble I have used:

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sudo journalctl _PID=xxx

replace xxx with the pid of the process shown in

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systemctl status -l systemd-modules-load.service

.
Thank you all for your time.
It's nice to be back to Debian after using the Arch linux.