Arch Linux

levose

Member

Registered: 2008-10-24

Posts: 10

[SOLVED] strange wireless network problem: cannot setup tcp connection

I'm having a wireless network problem with a dell inspiron 1501:
Pinging www.google.com is OK, but I just can not open the website (whether using w3m nor firefox).
Use "netstat -anp" showing that the tcp state is kept at SYN_SET, not changed afterwards.

But I try another IM application which use UDP protocol, it is OK.

So to summerize:
1. "dig www.google.com" works, the DNS resolve is OK.
2. "ping www.google.com" works.
3. opening up http://www.google.com do not respond anything.
4. Internet  application using UDP protocol works.
5. Change OS to Windows Vista, I can open the website.
6. The strange problem happens after I upgrade kernel from 2.6.26 to 2.6.27.

$ uname -a
Linux levcom 2.6.27-ARCH #1 SMP PREEMPT Fri Oct 17 07:35:10 UTC 2008 i686 AMD Turion(tm) 64 X2 Mobile Technology TL-50 AuthenticAMD GNU/Linux

$ lspci | grep Broadcom
05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
08:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)

I use the b43 driver (firmware is setup by steps on http://linuxwireless.org/en/users/Drive … efirmware):
$ lsmod |grep b4
b43                   128412  0
rfkill                 10008  1 b43
mac80211              158876  1 b43
led_class               5508  1 b43
input_polldev           5256  1 b43
b44                    28048  0
mii                     6528  1 b44
ssb                    40324  2 b43,b44
pcmcia                 35116  2 b43,ssb
pcmcia_core            33812  3 b43,ssb,pcmcia

Last edited by levose (2008-10-27 14:28:08)

levose

Member

Registered: 2008-10-24

Posts: 10

Re: [SOLVED] strange wireless network problem: cannot setup tcp connection

The firmware I use is broadcom-wl-4.150.10.5.tar.bz2 at
http://mirror2.openwrt.org/sources/broa … .5.tar.bz2

I notice there are also broadcom-wl-4.150.10.5.1.tar.bz2 & broadcom-wl-4.150.10.5.2.tar.bz2.
But the file date of broadcom-wl-4.150.10.5.tar.bz2 is newer, but the files in broadcom-wl-4.150.10.5.tar.bz2
is older than in broadcom-wl-4.150.10.5.2.tar.bz2

Yet I failed fwcut the firmware  broadcom-wl-4.150.10.5.2.tar.bz2 with checksum error notice.

levose

Member

Registered: 2008-10-24

Posts: 10

Re: [SOLVED] strange wireless network problem: cannot setup tcp connection

Hi all, any hints please?
It has bothered me some days.

With wire connection, all is OK.

levose

Member

Registered: 2008-10-24

Posts: 10

Re: [SOLVED] strange wireless network problem: cannot setup tcp connection

To my reference
http://bbs.archlinux.org/viewtopic.php?id=57722

I'll try that later.

wonder

Developer

From: Bucharest, Romania

Registered: 2006-07-05

Posts: 5,941

Website

Re: [SOLVED] strange wireless network problem: cannot setup tcp connection

i'm sure that you have this problem. http://lwn.net/Articles/304724/
try latest kernel 2.6.27.4 or do sysctl -w net.ipv4.tcp_timestamps=0

---

Give what you have. To someone, it may be better than you dare to think.

levose

Member

Registered: 2008-10-24

Posts: 10

Re: [SOLVED] strange wireless network problem: cannot setup tcp connection

i'm sure that you have this problem. http://lwn.net/Articles/304724/
try latest kernel 2.6.27.4 or do sysctl -w net.ipv4.tcp_timestamps=0

You are right,  after running

   sysctl -w net.ipv4.tcp_timestamps=0

I'm now happy web surfing.

Thank you all guys!

levose

Member

Registered: 2008-10-24

Posts: 10

Re: [SOLVED] strange wireless network problem: cannot setup tcp connection

Should we have an errata abount kernel issue and other important stuff?
That'll save a lot of trouble