[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.
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Cyril Hrubis
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Lars Marowsky-Bree
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User jslaby@novell.com added comment
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--- Comment #1 from Jiri Slaby
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Jiri Slaby
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User jslaby@novell.com added comment
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Jiri Slaby
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Jiri Slaby
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User casualprogrammer@gmail.com added comment
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Casual J. Programmer
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User jslaby@novell.com added comment
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--- Comment #4 from Jiri Slaby
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User casualprogrammer@gmail.com added comment
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--- Comment #5 from Casual J. Programmer
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User jslaby@novell.com added comment
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--- Comment #6 from Jiri Slaby
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User casualprogrammer@gmail.com added comment
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--- Comment #7 from Casual J. Programmer
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User jslaby@novell.com added comment
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--- Comment #8 from Jiri Slaby
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User casualprogrammer@gmail.com added comment
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Casual J. Programmer
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User jslaby@novell.com added comment
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Jiri Slaby
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User casualprogrammer@gmail.com added comment
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--- Comment #11 from Casual J. Programmer
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.
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User jslaby@novell.com added comment
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--- Comment #12 from Jiri Slaby
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.
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User swesemeyer@hotmail.com added comment
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Steve Wesemeyer
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User jslaby@novell.com added comment
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--- Comment #14 from Jiri Slaby
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.
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User swesemeyer@hotmail.com added comment
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--- Comment #15 from Steve Wesemeyer
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--- Comment #16 from Steve Wesemeyer
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Jiri Slaby
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--- Comment #17 from Steve Wesemeyer
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Steve Wesemeyer
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User jslaby@novell.com added comment
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--- Comment #19 from Jiri Slaby
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.
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User swesemeyer@hotmail.com added comment
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--- Comment #20 from Steve Wesemeyer
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User jslaby@novell.com added comment
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Jiri Slaby
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.
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User jslaby@novell.com added comment
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Jiri Slaby
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