Wifi connects but stops a lot

[fred]

Hi
We have installed LL on a new (1TB) HDD in a Compaq Presario sr5412de desktop, it has 4gb ram and (I think) a dual core 1.8 cpu.
The LL install went without incident and all updates were loaded while it was online via cable.
I plugged in an Edimax EW-7811un  USB WIFI  and established a connection to our Netgear R6520 router, I didn't test it beyond checking if it can go online.
I then moved the computer to its workstation which is less than 10m line of sight from the router.

Unfortunately I have found the WIFI drops out randomly and doesn't automatically restart.  The only way to reconnect is to manually disconnected and then reconnect or restart the computer.  There doesn't appear to be a pattern associated with the WIFI failures.
I think the problem doesnt rest with the router because we also have an Easybox router running in the same area, switching the WIFI to the Easybox doesn't change the connect-fail problem.

Any suggestions appreciated;
Thanks.

[Valtam]

Please paste the output of:

Code:

lsusb

[fred]

Hi Jerry
Thanks for the reply...
Here is the output.

Code:

KQ415AA-ABD-SR5412DE:~$ lsusb
Bus 001 Device 003: ID 0bda:0111 Realtek Semiconductor Corp. RTS5111 Card Reader Controller
Bus 001 Device 002: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
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 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

[Valtam]

Fred, give this a go:

Code:

sudo apt-get install linux-headers-generic build-essential dkms
git clone https://github.com/pvaret/rtl8192cu-fixes.git
sudo dkms add ./rtl8192cu-fixes
sudo dkms install 8192cu/1.10
sudo depmod -a
sudo cp ./rtl8192cu-fixes/blacklist-native-rtl8192.conf /etc/modprobe.d/

Reboot.

[fred]

I have completed the process and a restart.
On the restart, the WIFI connected a lot faster than I have previously observed and the signal strength has gone from a steady 3 bars to 4 bars, two positive changes.

I will have to leave this now and come back to it tomorrow for a longer test.

Thanks for your input so far Jerry it is appreciated;

Regards.

[Valtam]

No problem Fred, please let us know how you get on.

[fred]

[size=1em]It looks like the problem has been solved... That was easy :-)

So to satisfy my uninformed curiosity what was it your solution did?[/size][size=1em] 
As best as I can understand the process, the  apt-get  line was to go online and download a
dynamic kernel module which in this case is the rtl8192cu driver (which I guess is the latest Realtech 8192 driver).  [/size][size=1em]I then added and installed the new driver.  Not sure what the  sudo depmod -a  did though.
The last line was basically to blacklist any previous version of the rtl8192 driver...  am I close?

I have to say that to date, installing and configuring LL has been a remarkably easy process,
we also had to install configure win8.1, it definitely was not as simple as LL.[/size][size=1em]

Again, thanks for your input it is appreciated.

Regards.[/size]

[Valtam]

[size=1em]

So to satisfy my uninformed curiosity what was it your solution did?[/size][size=1em] 
[/size]

The existing driver was not efficient. The new instructions installed a stable, more reliable driver.

[morti]

..if its a more stable, and more reliable driver,Jerry - shouldn't we all be doing this install...or does it depend on the test result

[Valtam]

Depends on the result.

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