Hello, 1) Full computer model name: DELL Latitude E6540 With: 16GB of RAM 120GB SSD Intel Core I5 4200M Intel Corporation Centrino Ultimate-N 6300 AMD Radeon 8790M (Mars XTX)
2) BIOS: A15, latest, this not correct anything for the Wireless, but this fix many bugs like keyboard or usb disconnection. 3) AP: 01:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter (rev 01) TP-Link TL-WDN4800 ( http://www.tp-link.fr/products/details/?categoryid=1683&model=TL-WDN4800 ) The AP are 2 servers on Ubuntu 12.04.5 LTS 64bits, but I have no problems with others devices, and this computer have Wireless problems with all others AP. Connection type: 802.11n (Yes, the problem is the same with others types) Channel: 1 (The problem is the same with other channels) Wireless environnement: DS Parameter set: channel 1 DS Parameter set: channel 1 (My 2 AP, one is approximately as 1m, and the second is 2 floors upper) Encryption: WPA2-PSK Nope, changing encryption don't change anything. QoS: Nope, I have disabled this because it don't change anything for the AP, it's not a problem for today use with others computer. Beacon time: Default, 100 Changing beacon time: Not tested. Firewall: Yes, but not on the wireless interface, it's on the ethernet card where internet arrive. Nope, I don't disable the Firewall of my server, but this will close the network. The AP is on a bridge with 2 eth, and all packet who have source br0 are accepted for input and forward. Frequency: 2.4Ghz Not tested in 5Ghz because too many card are not compatibles. 4) With an other device, the AP have no problems. 5) 1 - 2m for the tests 6) 0, this is directly next to the AP wlan card 7) Yes 8) It seem that Natty have better performances, but it's really not perfect 14) Firmware version: [ 2.33682] iwlwifi 0000:03:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm 15) Ndiswrapper not tested, because for the same computer, Windows 7 64bits have a really good speed. (Approximately 15MB/s up and down on my AP) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1471794 Title: Wifi slow on Intel Corporation Centrino Ultimate-N 6300 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1471794/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
