Ubuntu – Ubuntu 15.10, trendnet TEW-648UBM, internet drops

Dears all,

I just installed ubuntu 15.10 on a dell xps 13 (9350).
The internal wifi card is currently not supported under linux, so meanwhile I purchased a trendnet TEW-648UBM.

It works "almost" out of the box, except that very often I can not access internet anymore, while the wifi is still connected (according to the network manager).

Then I need to disable wifi/re-enable, or even plug it out & in.

I would post logfiles but I am not sure which is the useful one.

Could you help me ?

as an addon, lspci -v yields:

3b:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 525a (rev 01)
Subsystem: Dell Device 0704
Flags: bus master, fast devsel, latency 0, IRQ 276
Memory at dc600000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci

I also tried the solution here:
TRENDnet TEW-648UBM 802.11n 150Mbps Micro Wireless N Adapter not working

but when I do that the adapter is not recognized at all anymore

when I disable the wifi I get the following entry in dmesg:

[ 3671.467610] wlxd8eb9728e940: deauthenticating from
f0:82:61:7f:06:00 by local choice (Reason: 3=DEAUTH_LEAVING) [
3671.487345] cfg80211: World regulatory domain updated: [ 3671.487348] cfg80211: DFS Master region: unset [ 3671.487350] cfg80211:
(start_freq – end_freq @ bandwidth), (max_antenna_gain, max_eirp),
(dfs_cac_time) [ 3671.487352] cfg80211: (2402000 KHz – 2472000 KHz @
40000 KHz), (N/A, 2000 mBm), (N/A) [ 3671.487354] cfg80211: (2457000
KHz – 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) [ 3671.487356]
cfg80211: (2474000 KHz – 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm),
(N/A) [ 3671.487358] cfg80211: (5170000 KHz – 5250000 KHz @ 80000
KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) [ 3671.487360] cfg80211:
(5250000 KHz – 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000
mBm), (0 s) [ 3671.487362] cfg80211: (5490000 KHz – 5730000 KHz @
160000 KHz), (N/A, 2000 mBm), (0 s) [ 3671.487363] cfg80211:
(5735000 KHz – 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) [
3671.487365] cfg80211: (57240000 KHz – 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)

When I enable it again I get:

[ 3696.695473] rtl8192cu: MAC auto ON okay! [ 3696.705997] rtl8192cu:
Tx queue select: 0x05 [ 3697.194423] IPv6: ADDRCONF(NETDEV_UP):
wlxd8eb9728e940: link is not ready [ 3697.221099] IPv6:
ADDRCONF(NETDEV_UP): wlxd8eb9728e940: link is not ready [ 3698.099333]
wlxd8eb9728e940: authenticate with f0:82:61:7f:06:00 [ 3698.110256]
wlxd8eb9728e940: send auth to f0:82:61:7f:06:00 (try 1/3) [
3698.121718] wlxd8eb9728e940: authenticated [ 3698.125993] wlxd8eb9728e940: associate with f0:82:61:7f:06:00 (try 1/3) [
3698.137456] wlxd8eb9728e940: RX AssocResp from f0:82:61:7f:06:00 (capab=0x411 status=0 aid=4) [ 3698.138237] wlxd8eb9728e940:
associated [ 3698.138261] IPv6: ADDRCONF(NETDEV_CHANGE):
wlxd8eb9728e940: link becomes ready

if I run dmesg | grep rtl8192

[ 6.371861] rtl8192cu: Chip version 0x10 [ 6.453835] rtl8192cu:
MAC address: d8:eb:97:28:e9:40 [ 6.453840] rtl8192cu: Board Type 0
[ 6.453936] rtl8192cu: Loading firmware
rtlwifi/rtl8192cufw_TMSC.bin [ 6.485037] usbcore: registered new
interface driver rtl8192cu [ 6.486499] rtl8192cu 1-2:1.0
wlxd8eb9728e940: renamed from wlan0 [ 6.547964] rtl8192cu: MAC auto
ON okay! [ 6.560302] rtl8192cu: Tx queue select: 0x05 [
4197.188439] rtl8192cu: MAC auto ON okay! [ 4197.199672] rtl8192cu: Tx queue select: 0x05

Would any of you have some idea to help, adding the wlx… in /etc/network/interfaces as shown in my comment below did not help

Thx,
Timothé