Recently I've switched from Windows to Ubuntu. I really love it, but one thing is a real pain: my wifi (Dell Vostro V131 notebook, Centrino Wireless-N 1030) isn't working most of the time with different routers. I've spend many hours to fix this problem, but it still doesn't work. The problem is complex, because it's the combination of my wifi card, Ubuntu and some of the networks I try to connect with.
I can connect to a wifi network, but it's very slow (<1 Mbit/s).
To summerize:
- I've reinstalled Ubuntu and switched from Ubuntu 14.04 to Kubuntu 14.10. I've disabled IPv6 and turn off WPA2-security (used a mac-filter instead) and disabled N-mode (Network Issues since Trusty). I've disabled power management and changed many different settings in my router. And I've changed my country code (https://askubuntu.com/a/171398/297583). And I'm sure I forgot 23231 other things I did.
- I've tried many different routers/access points: D-Link DIR-636L, TP-Link TL-WR1043ND, TL-Link TL-WDR3600, ZyXel P-2812HNU-F1 and many others. They all had problems.
- There are many connections that don't have any problems at all. On many other networks, like public hotspots (i.e. in public transport or eduroam at my university) there is no problem.
- When I connect my phone to my notebook with USB (and connect the phone with wifi) it works.
- With an USB dongle (TP-Link TL-WN722N) it works perfectly.
- I haven't got problems in Windows
What else can I try?
If there is no simple solution, maybe it's better to replace the wifi card by another one. In that case, which one do I have to choose? Do I have to replace it by a device that's not on this list (http://wireless.kernel.org/en/users/Drivers/iwlwifi)?
Some configuration/log files:
Update: high invalid misc value:
When I look at iwconfig I'm seeing a very high 'invalid misc' value:
wlan0 IEEE 802.11bg ESSID:"Zy_private_XJ7U37"
Mode:Managed Frequency:2.417 GHz Access Point: CC:5D:4E:1A:3C:7C
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-25 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:379 Invalid misc:51889 Missed beacon:0
Another network (no security) is having many errors as well (only one minute connected):
wlan0 IEEE 802.11bg ESSID:"Test"
Mode:Managed Frequency:2.417 GHz Access Point: CC:5D:4E:1A:3C:7D
Bit Rate=1 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-25 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:48 Invalid misc:1273 Missed beacon:0
Update: switched to WiFi Link 5100
I just removed the wifi card from my previous laptop (Vostro V13). The other card (Intel WiFi Link 5100) doesn't work either.
