Wireless drops repeatedly - Linksys E1000, Realtek RTL8191SEvB

[aman_cc]

I have
- Ubuntu 10.10 64 bit
- Kernel 2.6.35-28-generic
- Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller (rev 10)
- Linksys E1000 wireless router

Problem - Wireless keeps dropping. It doesn't disconnect but I can't ping any site. Dis-connecting / re-connecting makes it work fine, but it drops again.
I have Windows 7 on the same computer - I face no problem there.

What all I have done so far
1. Un-installed Network Manager and installed wicd - no success
2. Reading some threads and sites - but no success
3. Tried contacting Linksys support - but no success

My linux skills - very basic.


Output of some commands I ran -
lspci | grep Network
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06)
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller (rev 10)

nm-tool
- Device: wlan0 [cc] ----------------------------------------------------------
Type: 802.11 WiFi
Driver: rtl819xSE
State: connected
Default: yes
HW Address: F0:7B:CB:A6:03: DB


Any help / pointers will be much appreciated. This problem is making me think of stop using Ubuntu.

Thanks

[aman_cc]

This what I could see in the messages log

Apr 10 08:21:30 T410 kernel: [ 3942.345797] NVRM: os_raise_smp_barrier(), invalid context!
Apr 10 08:21:30 T410 kernel: [ 3942.362527] NVRM: os_raise_smp_barrier(), invalid context!
Apr 10 08:21:35 T410 kernel: [ 3947.338748] NVRM: os_raise_smp_barrier(), invalid context!
Apr 10 08:21:35 T410 kernel: [ 3947.353585] NVRM: os_raise_smp_barrier(), invalid context!
Apr 10 08:21:39 T410 kernel: [ 3951.321680] ===>rtl8192se_link_change():ieee->iw_mode is 2
Apr 10 08:21:39 T410 kernel: [ 3951.374472] =====>rtl8192_set_chan()====ch:1
Apr 10 08:21:39 T410 kernel: [ 3951.495351] =====>rtl8192_set_chan()====ch:2
Apr 10 08:21:39 T410 kernel: [ 3951.613942] =====>rtl8192_set_chan()====ch:3
Apr 10 08:21:39 T410 kernel: [ 3951.723790] =====>rtl8192_set_chan()====ch:4
Apr 10 08:21:39 T410 kernel: [ 3951.834860] =====>rtl8192_set_chan()====ch:5
Apr 10 08:21:39 T410 kernel: [ 3951.953412] =====>rtl8192_set_chan()====ch:6
Apr 10 08:21:39 T410 kernel: [ 3952.063224] =====>rtl8192_set_chan()====ch:7
Apr 10 08:21:39 T410 kernel: [ 3952.174286] =====>rtl8192_set_chan()====ch:8
Apr 10 08:21:39 T410 kernel: [ 3952.292871] =====>rtl8192_set_chan()====ch:9
Apr 10 08:21:40 T410 kernel: [ 3952.403710] =====>rtl8192_set_chan()====ch:10
Apr 10 08:21:40 T410 kernel: [ 3952.512493] =====>rtl8192_set_chan()====ch:11
Apr 10 08:21:40 T410 kernel: [ 3952.622354] =====>rtl8192_set_chan()====ch:12
Apr 10 08:21:40 T410 kernel: [ 3952.732161] =====>rtl8192_set_chan()====ch:13
Apr 10 08:21:40 T410 kernel: [ 3952.843246] =====>rtl8192_set_chan()====ch:9
Apr 10 08:21:40 T410 kernel: [ 3952.853473] ===>rtl8192se_link_change():ieee->iw_mode is 2
Apr 10 08:21:40 T410 kernel: [ 3952.853482] rtl8192_update_cap(): WLAN_CAPABILITY_LONG_PREAMBLE

Any help please ?

[aman_cc]

Another thing I noticed, the connection drops lot more frequently when using applications like
- Update Manager
- BitTorrent
etc (maybe because of higher traffic ??)

[aman_cc]

@ashily24dee hi - if you could please share what did u do to make the wireless work for you plz

thanks

[aman_cc]

There is this thread
http://ubuntuforums.org/showthread.php?t=1653157

which seems to suggest a solution - but hasn't worked yet for me.

Can anyone please help?

[aman_cc]

Bumping !

Anyone has any experience on this with Natty? Is the problem still there with Natty?

[aman_cc]

bump plz


One clarification - The wifi doen't drop. It just freezes ! For any browser request / download, it gives a time-out. Even ping times out.


I have been banging my head on this for past 2 weeks. No success. Can anyone please help?

[yungballla6]

Hi, I'm having this same problem and have noticed that it cannot be the router. Since I have tried my connection on many other sources. And the problem happens each time no matter what connection. I have a realtek card also. Just putting in my two cents.

[aman_cc]

Hi, I'm having this same problem and have noticed that it cannot be the router. Since I have tried my connection on many other sources. And the problem happens each time no matter what connection. I have a realtek card also. Just putting in my two cents.

Yes doesn't seem to be a router problem. I have a dual boot with Win 7 64 bit and face no problem with that OS. Thanks

[JVP3122]

I'm having the same problem. Another proof it's not the router is that my wife uses the same router at the same time and she never has this problem.