[Bug 404774] New: iwl3945 sensitivity issue
https://bugzilla.novell.com/show_bug.cgi?id=404774 Summary: iwl3945 sensitivity issue Product: openSUSE 11.0 Version: Final Platform: x86 OS/Version: openSUSE 11.0 Status: NEW Severity: Normal Priority: P5 - None Component: Network AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: casualprogrammer@gmail.com QAContact: qa@suse.de Found By: Beta-Customer There seems to be quite a difference in sensitivity between MS Windows XP Professionals ipw3945 driver and the one used by openSUSE. I have noticed this on various occasions, presently I am located in a Hotel in Stuttgart and can "see" just 30% (3 out of ten) hot spots I receive with MS Windows XP. hwinfo --wlan 07: PCI 100.0: 0282 WLAN controller [Created at pci.310] UDI: /org/freedesktop/Hal/devices/pci_8086_4222 Unique ID: y9sn.xDGkhUDfcCA Parent ID: z8Q3.ZbAWgKMCoE3 SysFS ID: /devices/pci0000:00/0000:00:1c.0/0000:01:00.0 SysFS BusID: 0000:01:00.0 Hardware Class: network Model: "Intel PRO/Wireless 3945ABG Network Connection" Vendor: pci 0x8086 "Intel Corporation" Device: pci 0x4222 "PRO/Wireless 3945ABG Network Connection" SubVendor: pci 0x8086 "Intel Corporation" SubDevice: pci 0x1001 Revision: 0x02 Driver: "iwl3945" Driver Modules: "iwl3945" Device File: wlan0 Features: WLAN Memory Range: 0xda000000-0xda000fff (rw,non-prefetchable) IRQ: 219 (no events) HW Address: 00:13:02:18:12:ac Link detected: yes WLAN channels: 1 2 3 4 5 6 7 8 9 10 11 12 13 34 36 38 40 42 44 46 48 52 56 60 64 100 104 108 112 116 120 124 WLAN frequencies: 2.412 2.417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 2.472 5.17 5.18 5.19 5.2 5.21 5.22 5.23 5.24 5.26 5.28 5.3 5.32 5.5 5.52 5.54 5.56 5.58 5.6 5.62 WLAN encryption modes: WEP40 WEP104 TKIP CCMP WLAN authentication modes: open sharedkey wpa-psk wpa-eap Module Alias: "pci:v00008086d00004222sv00008086sd00001001bc02sc80i00" Driver Info #0: Driver Status: iwl3945 is active Driver Activation Cmd: "modprobe iwl3945" Config Status: cfg=no, avail=yes, need=no, active=unknown Attached to: #20 (PCI bridge) iwl3945-ucode-2.14.1.5-50.1 kernel-pae-2.6.25.5-1.1 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 Cyril Hrubis <chrubis@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|bnc-team-screening@forge.provo.novell.com |kernel-maintainers@forge.provo.novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 Lars Marowsky-Bree <lmb@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|kernel-maintainers@forge.provo.novell.com |jslaby@novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c1 --- Comment #1 from Jiri Slaby <jslaby@novell.com> 2008-07-07 07:16:13 MDT --- If you switch to monitor mode (iwconfig wlan0 mode monitor) and capture wmaster0 traffic (e.g. via wireshark), do you see beacons from all of those? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO Info Provider| |casualprogrammer@gmail.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c2 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED Info Provider|casualprogrammer@gmail.com | Resolution| |NORESPONSE --- Comment #2 from Jiri Slaby <jslaby@novell.com> 2008-08-05 05:12:22 MDT --- If this is still an issue, reopen the bug. Closing as noresponse. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User casualprogrammer@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c3 Casual J. Programmer <casualprogrammer@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|CLOSED |REOPENED Resolution|NORESPONSE | --- Comment #3 from Casual J. Programmer <casualprogrammer@gmail.com> 2008-08-05 05:17:07 MDT --- Sorry, I answered to comment #1, but somehow the update didn't go through :-( I said, that I don't know how to operate wireshark, but that Kismet shows a lot more APs than does NM or WPA_GUI. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c4 --- Comment #4 from Jiri Slaby <jslaby@novell.com> 2008-08-06 02:25:03 MDT --- Kismet under windows or linux? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User casualprogrammer@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c5 --- Comment #5 from Casual J. Programmer <casualprogrammer@gmail.com> 2008-08-06 03:48:25 MDT --- http://download.opensuse.org/distribution/11.0/repo/oss/suse/i586/kismet-200... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c6 --- Comment #6 from Jiri Slaby <jslaby@novell.com> 2008-08-06 05:07:34 MDT --- Well, are you able to connect (in windows) to those you see in windows and not in linux? Kismet grabs also stray beacons, it has nothing to do with sensitivity. I suppose you can't connect to APs shown in kismet and not in iwlist wlan0 scan? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User casualprogrammer@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c7 --- Comment #7 from Casual J. Programmer <casualprogrammer@gmail.com> 2008-08-06 06:14:30 MDT --- The question is somewhat hypothetical, how would I be able to connect to just any AP I see in Windows ? I can connect to those I have credentials for, and not all are visible in Linux. Also, please set the NEEDINFO flag when requesting information, otherwise I might not notice that I am required to act on the bug, thank you. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c8 --- Comment #8 from Jiri Slaby <jslaby@novell.com> 2008-08-06 06:40:42 MDT --- So how do you know, that windows doesn't display all those, whose one single beacon came in? How did you track this down to an iwl3945 sensitivity problem? You see, that you are able to catch beacons even from APs not shown in NM, anyway it's nonsense to show them in search results. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User casualprogrammer@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c9 Casual J. Programmer <casualprogrammer@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jpr@novell.com --- Comment #9 from Casual J. Programmer <casualprogrammer@gmail.com> 2008-08-06 12:21:30 MDT --- You can close this bug if you are not willing to treat it seriously. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c10 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution| |INVALID --- Comment #10 from Jiri Slaby <jslaby@novell.com> 2008-08-06 15:24:46 MDT --- Well, you didn't persuade me that it's a bug nor a problem. If you could come with a testcase, reopen the bug. I can't see an AP in linux which I'm not able to connect to in windows is not a good starting point, sorry. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User casualprogrammer@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c11 --- Comment #11 from Casual J. Programmer <casualprogrammer@gmail.com> 2008-08-06 23:27:10 MDT --- This is just another example of ignorance and selfrighteousness, have it your way..
I can't see an AP in linux which I'm not able to connect to in windows is not a good starting point,
Is not what I reported. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c12 --- Comment #12 from Jiri Slaby <jslaby@novell.com> 2008-08-07 01:00:52 MDT --- (In reply to comment #11 from Casual J. Programmer)
This is just another example of ignorance and selfrighteousness, have it your way..
Personal attacks won't help you. A testcase will.
I can't see an AP in linux which I'm not able to connect to in windows is not a good starting point,
Is not what I reported.
Ok, try to reformulate the report, maybe it's just my misunderstanding. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User swesemeyer@hotmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c13 Steve Wesemeyer <swesemeyer@hotmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |swesemeyer@hotmail.com Status|RESOLVED |REOPENED Resolution|INVALID | --- Comment #13 from Steve Wesemeyer <swesemeyer@hotmail.com> 2008-11-18 06:46:38 MST --- Hiya, I think I am experiencing something similar as the original reporter... My test case is as follows: I have a Gateway MX6923b laptop on which I have installed Opensuse 11.0 plus all current updates. I have also got an Asus WL500gP wireless router configured with standard WEP encryption. Now using Windows in my kitchen (which is about 5 metres underneath the router's location separated by a thin wooden ceiling), I can connect to the router every time and the signal strength is reported as very good (something in the 90% region). Using Linux, I usually don't get a connection at all and the wireless network does not show up in "kinternet->Wireless Connections". I have to physically go to my access point, get the laptop to connect and then I can go back downstairs and maintain the connection. However, the signal strength that iwlist and kinternet report is something like 50%. This is quite frustrating as you can imagine... Once it is connected, it usually manages to reconnect but then again sometimes it doesn't... Similarly, Windows seems to pick up all the other wireless networks in the neighbourhood from almost anywhere in the house whereas Linux only picks them up when I get closer to the relevant routers. (As they are all encrypted, I cannot try to connect to them). So, in summary, the Windows driver is better at picking up the signals (ie more sensitive) than the Linux driver. Cheers, Steve -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c14 --- Comment #14 from Jiri Slaby <jslaby@novell.com> 2008-11-22 09:54:33 MST --- (In reply to comment #13 from Steve Wesemeyer)
Using Linux, I usually don't get a connection at all and the wireless network does not show up in "kinternet->Wireless Connections". I have to physically go to my access point, get the laptop to connect and then I can go back downstairs and maintain the connection. However, the signal strength that iwlist and kinternet report is something like 50%. This is quite frustrating as you can imagine...
The numbers are relative, maybe only wrongly computed (e.g. wrong max signal strength, bug in driver, firmware, hardware...).
Once it is connected, it usually manages to reconnect but then again sometimes it doesn't...
Well, could you provide dmesg of such a situation?
So, in summary, the Windows driver is better at picking up the signals (ie more sensitive) than the Linux driver.
No, you can't utter that from the text above. As I already wrote, it depends on what windows enumerates as able-to-connect APs. Unless you can verify that you can connect to them, it tells us nothing. I suppose you have 3945 too? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User swesemeyer@hotmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c15 --- Comment #15 from Steve Wesemeyer <swesemeyer@hotmail.com> 2008-11-23 11:08:47 MST --- I will try and capture the dmesg when this happen. My current workaround is to ignore kinternet completely and manually bring up the Wifi card using ifup wlan0 as root, this usually results in the dhcp process backgrounding as it can't get an IP address. Once the wlan0 is up with no IP address, I keep scanning the available networks using iwlist wlan0 scanning. The first couple of times it always comes back with no network found but as soon as it can see my network it connects fine. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User swesemeyer@hotmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c16 --- Comment #16 from Steve Wesemeyer <swesemeyer@hotmail.com> 2008-11-23 11:09:37 MST --- And yes, I do have 3945, too. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |NEEDINFO Info Provider| |swesemeyer@hotmail.com Priority|P5 - None |P4 - Low -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User swesemeyer@hotmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c17 --- Comment #17 from Steve Wesemeyer <swesemeyer@hotmail.com> 2008-12-01 07:42:34 MST --- Created an attachment (id=256964) --> (https://bugzilla.novell.com/attachment.cgi?id=256964) dmesg output Tried connecting this afternoon and even with the ifup/iwlist wlan0 scanning approach I could not establish a connection. I had to physically go upstairs and be next to my AP to connect. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User swesemeyer@hotmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c18 Steve Wesemeyer <swesemeyer@hotmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |REOPENED Info Provider|swesemeyer@hotmail.com | --- Comment #18 from Steve Wesemeyer <swesemeyer@hotmail.com> 2008-12-01 07:43:51 MST --- Created an attachment (id=256965) --> (https://bugzilla.novell.com/attachment.cgi?id=256965) corresponding var/log/messages output Not sure whether this is needed but just for good measures I have attached the var/log/messages section relevant to this. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c19 --- Comment #19 from Jiri Slaby <jslaby@novell.com> 2008-12-01 08:27:32 MST --- (In reply to comment #18 from Steve Wesemeyer)
Not sure whether this is needed but just for good measures I have attached the var/log/messages section relevant to this.
Yes, at least we have the time axis. I suppose you moved closer to the AP at 14:34:26? I see all 3 auth resp frames coming 2 seconds after it timed out at 14:30:19, that's weird... Don't you have a second laptop to capture the wireless traffic to see what's happening here? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User swesemeyer@hotmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c20 --- Comment #20 from Steve Wesemeyer <swesemeyer@hotmail.com> 2008-12-01 11:34:54 MST --- I was next to the access point when it connected again which was around that time... I have another laptop with which to capture the traffic - What program do you want me to use? Wireshark? And what settings? The main issue is going to be finding another occurrence of this happening. As I said, my workaround usually works. But next time this happens, I'll try and capture the network traffic. Cheers, Steve -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c21 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |NEEDINFO Info Provider| |swesemeyer@hotmail.com --- Comment #21 from Jiri Slaby <jslaby@novell.com> 2008-12-08 07:55:04 MST --- (In reply to comment #20 from Steve Wesemeyer)
I have another laptop with which to capture the traffic - What program do you want me to use? Wireshark? And what settings?
What's the card in the second laptop? If it uses mac80211 and supports monitor mode, you should do: # ip link set wlan0 down # iwconfig wlan0 mode monitor # ip link set up and run tcpdump with dumping to a file (tcpdump -i wlan0 -s 0 -w output_file) or wireshark (choose wlan0 as a capture device) and save the captured packets after the unsuccessful association.
But next time this happens, I'll try and capture the network traffic.
Ok, thanks. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=404774 User jslaby@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=404774#c22 Jiri Slaby <jslaby@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED Info Provider|swesemeyer@hotmail.com | Resolution| |NORESPONSE --- Comment #22 from Jiri Slaby <jslaby@novell.com> 2009-02-18 03:19:53 MST --- After you provide requested logs, feel free to reopen the entry. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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