Hi,

I run a 

root@Silberkiste:~# lspci |grep Network
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8192CE PCIe 
Wireless Network Adapter (rev 01)
root@Silberkiste:~# 

on Debian jessie with a recent kernel from backports

root@Silberkiste:~# uname -a
Linux Silberkiste 4.7.0-0.bpo.1-amd64 #1 SMP Debian 4.7.8-1~bpo8+1 (2016-10-19) 
x86_64 GNU/Linux
root@Silberkiste:~# 

I added the adapter to /etc/network/interfaces:

root@Silberkiste:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp

# WLAN interface
allow-hotplug wlan0



iface wlan0 inet dhcp
        wpa-ssid LS6
        wpa-psk <passkey>
#        wpa-driver wext
#        wpa-key-mgmt WPA-PSK

root@Silberkiste:~# 


But I do not get the network up and running:

dmesg states

[    3.787915] rtl8192ce: Using firmware rtlwifi/rtl8192cfw.bin
[    3.788155] [drm] ring test on 0 succeeded in 2 usecs
[    3.789155] [drm] ring test on 1 succeeded in 2 usecs
[    3.789195] [drm] ring test on 2 succeeded in 3 usecs
[    3.789428] [drm] ring test on 3 succeeded in 4 usecs
[    3.789437] [drm] ring test on 4 succeeded in 4 usecs
[    3.792511] usbcore: registered new interface driver snd-usb-audio
[    3.794410] rtl8192ce 0000:01:00.0: firmware: direct-loading firmware 
rtlwifi/rtl8192cfw.bin
[    3.807820] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[    3.808174] rtlwifi: rtlwifi: wireless switch is on
[    3.837689] [drm] ring test on 5 succeeded in 1 usecs
[    3.839324] input: PC Speaker as /devices/platform/pcspkr/input/input9
[    3.845309] random: nonblocking pool is initialized
[    3.857768] [drm] UVD initialized successfully.
[    3.882699] AVX version of gcm_enc/dec engaged.
[    3.882705] AES CTR mode by8 optimization enabled
[    3.924616] alg: No test for fips(ansi_cprng) (fips_ansi_cprng)
[    3.956481] r8169 0000:02:00.0: firmware: direct-loading firmware 
rtl_nic/rtl8168e-3.fw
[    3.969039] [drm] ring test on 6 succeeded in 16 usecs
[    3.969054] [drm] ring test on 7 succeeded in 3 usecs
[    3.969056] [drm] VCE initialized successfully.
[    3.971066] [drm] ib test on ring 0 succeeded in 0 usecs
[    4.079816] r8169 0000:02:00.0 eth0: link down
[    4.079917] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[    4.080361] r8169 0000:02:00.0 eth0: link down
[    4.089391] Adding 7815616k swap on /dev/sdb2.  Priority:-1 extents:1 
across:7815616k FS
[    4.089836] kvm: Nested Virtualization enabled
[    4.089841] kvm: Nested Paging enabled
[    4.469553] [drm] ib test on ring 1 succeeded in 0 usecs
[    4.678134] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready


/sbin/ifconfig shows:

root@Silberkiste:~# /sbin/ifconfig 
eth0      Link encap:Ethernet  Hardware Adresse 74:d4:35:7b:0d:c4  
          inet Adresse:192.168.178.56  Bcast:192.168.178.255  
Maske:255.255.255.0
          inet6-Adresse: fd00::76d4:35ff:fe7b:dc4/64 Gültigkeitsbereich:Global
          inet6-Adresse: fe80::76d4:35ff:fe7b:dc4/64 
Gültigkeitsbereich:Verbindung
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:3582 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2828 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1000 
          RX bytes:2784351 (2.6 MiB)  TX bytes:534169 (521.6 KiB)

lo        Link encap:Lokale Schleife  
          inet Adresse:127.0.0.1  Maske:255.0.0.0
          inet6-Adresse: ::1/128 Gültigkeitsbereich:Maschine
          UP LOOPBACK RUNNING  MTU:65536  Metrik:1
          RX packets:110 errors:0 dropped:0 overruns:0 frame:0
          TX packets:110 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1 
          RX bytes:15055 (14.7 KiB)  TX bytes:15055 (14.7 KiB)

wlan0     Link encap:Ethernet  Hardware Adresse 30:5a:3a:5d:6f:df  
          UP BROADCAST MULTICAST  MTU:1500  Metrik:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

root@Silberkiste:~# 

Any idea why that is not working is welcome.

Many thanks
Rainer


-- 
Rainer Dorsch
http://bokomoko.de/

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