Realtek Semiconductor 802.11b/g/n WiFi Adapter Keeps Disconnecting Randomly

[theterabyteboy]

Hi I am running
Ubuntu 11.10.
and I have a
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)

My computer is a lenovo T520 and my wireless card keep randomly disconnecting from the wireless network. Does anybody have some checks I can run to see if I need to update the driver or know of a fix for this?

Thank you!

[wildmanne39]

Hi please post the results of:

lspci -nnk | grep -iA2 net

Thank you

[theterabyteboy]

Hi please post the results of:

lspci -nnk | grep -iA2 net

Thank you

Here is the result of that command:

00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
	Subsystem: Lenovo Device [17aa:21ce]
	Kernel driver in use: e1000e
--
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
	Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8195]
	Kernel driver in use: rtl8192ce

Thank you!

[wildmanne39]

Hi, I have been researching your issue for quite a while now and it looks like it is issues with the driver most likely and it does not look promising, but post the results of these commands after you get disconnected and we will see if we can find anything that might help.

nm-tool

rfkill list all

iwconfig

sudo cat /var/log/syslog | grep -e rtl -e firmware -e wlan -e wpa -e etwork | tail -n55

dmesg | grep rtl

by clicking on new reply and click # and paste the information between the brackets.
Thank you

[bogan]

Hi! theterabyteboy.

You posted:

My computer is a lenovo T520 and my wireless card keep randomly disconnecting from the wireless network. Does anybody have some checks I can run to see if I need to update the driver or know of a fix for this?

I too have problems with a Realtek RTL8188 Wlan Usb Adapter, but mine is a SU not a CE.
I have no idea what the difference is, but mine runs under Ubuntu 11.10, but not properly under 10.10,
equally mine also does not see the Wlanx entries from

lspci -nnk | grep -a2 net

Try

 sudo nm-tool

It is a bit querky but showed the driver with mine as r8172u, but when I tried it again, just now, it showed: driver = usb !!

Good luck! but do not ask what is the right way to find out what wlan driver is in use!
It`s no,no question. The last person to ask before me, without being given an answer, got told:

"Halloween has been an(sic) gone.
Please do not raise old threads from the dead.
[Thread] Closed.
Quote:
Linux assumes you know exactly what you are doing"

That last bit is his very appropriate signature, pity he did not add the word " wrong" to the end of it.

Chao" bogan.

[praseodym]

Hi,

cable connection is working? Update the driver rtl8192ce via:

sudo apt-get install --reinstall linux-headers-$(uname -r) build-essential
wget http://media.cdn.ubuntu-de.org/forum/attachments/2844083/rtl_92ce_92se_92de_Ubuntu_11.x_mac80211_0004.0816.2011.tar.gz
tar xvf rtl_92ce_92se_92de_Ubuntu_11.x_mac80211_0004.0816.2011.tar.gz
cd rtl_92ce_92se_92de_Ubuntu_11.x_mac80211_0004.0816.2011
make
sudo make install
sudo cp -r firmware/* /lib/firmware

Reboot and check:

uname -a
iwconfig
lsmod
sudo iwlist scan
modinfo rtl8192ce | egrep 'versi|filen'
rfkill list

Dont remove the driver, you need to compile it again if a kernel update occurs.

[wildmanne39]

Hi praseodym, I thought that since the client is running 11.10 and from what I read that the driver is already the latest?
Thank you

[praseodym]

Hi,

the driver I posted is Source-Version 0004.0816.2011. The client may check

modinfo rtl8192ce | egrep 'versi|filen'

first. Maybe the new firnware is enough?!

[wildmanne39]

Hi,this is what is shown.
larryshp:~$ modinfo rtl8192ce | egrep 'versi|filen'

filename: /lib/modules/3.0.0-12-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192ce/rtl8192ce.ko
srcversion: 88D2C6ADED1C5FC2EAE88BB
vermagic: 3.0.0-12-generic SMP mod_unload modversions

Thank you

[bogan]

Hi!, praseodym,
You posted:

The client may check:

modinfo rtl8192ce | egrep 'versi|filen'

To help sort out my own problems, if I substitute the correct driver name in that command, should it work in Ubuntu 10.10?
I only get a series of:

No command `xxxxx` found

!!!!