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I installed Ubuntu about 5 weeks ago and I really like it =). But I'm suffering from an extremely slow Wlan connection. It's the same problem in different Networks, and I don't have the same problems on my dual-boot Windows 8.1 or on different devices. I tried different things like

sudo rmmod iwlwifi sudo modprobe iwlwifi 11n_disable=1

or

sudo iwconfig wlan0 power off

but nothing seamed to work. Therefore I hope you can help me.

Here I've got a few terminal outputs that may help you:

cat /etc/lsb-release; uname -a

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.4 LTS"
Linux cyrillsUbuntu 3.11.0-18-generic #32~precise1-Ubuntu SMP Thu Feb 20 17:52:10 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

lspci -nnk | grep -iA2 net

00:19.0 Ethernet controller [0200]: Intel Corporation 82577LM Gigabit Network Connection [8086:10ea] (rev 05)
Subsystem: Hewlett-Packard Company Device [103c:1521]
Kernel driver in use: e1000e
44:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6200 [8086:4239] (rev 35)
Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN [8086:1311]
Kernel driver in use: iwlwifi

lsusb

Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 03f0:241d Hewlett-Packard Gobi 2000 Wireless Modem (QDL mode)
Bus 001 Device 004: ID 138a:0007 Validity Sensors, Inc. VFS451 Fingerprint Reader
Bus 001 Device 005: ID 04f2:b15e Chicony Electronics Co., Ltd 
Bus 002 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver

iwconfig

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"netgear"  
      Mode:Managed  Frequency:2.412 GHz  Access Point: 20:4E:7F:7A:49:AC   
      Bit Rate=54 Mb/s   Tx-Power=15 dBm   
      Retry  long limit:7   RTS thr:off   Fragment thr:off
      Power Management:off
      Link Quality=70/70  Signal level=-40 dBm  
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:319   Missed beacon:0

rfkill list all

0: hp-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hp-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
2: hp-wwan: Wireless WAN
Soft blocked: no
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

lsmod

Module                  Size  Used by
ip6table_filter        12815  0 
ip6_tables             27502  1 ip6table_filter
iptable_filter         12810  0 
ip_tables              27716  1 iptable_filter
x_tables               34194  4 ip6table_filter,ip6_tables,iptable_filter,ip_tables
bnep                   24107  2 
rfcomm                 74718  0 
bluetooth             391726  10 bnep,rfcomm
binfmt_misc            17508  1 
nvidia              10619255  41 
snd_hda_codec_hdmi     41773  4 
arc4                   12573  2 
snd_hda_codec_idt      55053  1 
iwldvm                244387  0 
snd_hda_intel          57134  5 
mac80211              623607  1 iwldvm
snd_hda_codec         194817  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
pata_pcmcia            17081  1 
snd_hwdep              13613  1 snd_hda_codec
snd_pcm               107140  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
snd_rawmidi            30416  1 snd_seq_midi
snd_seq_midi_event     14899  1 snd_seq_midi
snd_seq                66061  2 snd_seq_midi,snd_seq_midi_event
snd_timer              29989  2 snd_pcm,snd_seq
uvcvideo               82247  0 
r852                   18241  0 
sm_common              16860  1 r852
nand                   64723  2 r852,sm_common
snd_seq_device         14497  3 snd_seq_midi,snd_rawmidi,snd_seq
qcserial               13139  0 
usb_wwan               20417  1 qcserial
videobuf2_core         40815  1 uvcvideo
mtd                    59660  2 sm_common,nand
videodev              138562  2 uvcvideo,videobuf2_core
usbserial              44971  2 qcserial,usb_wwan
videobuf2_vmalloc      13216  1 uvcvideo
snd                    73753  21    snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq_midi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
videobuf2_memops       13362  1 videobuf2_vmalloc
nand_ids                8627  1 nand
soundcore              12680  1 snd 
nand_bch               13227  1 nand
r592                   18148  0 
joydev                 17613  0 
iwlwifi               179516  1 iwldvm
bch                    22063  1 nand_bch
pcmcia                 62188  1 pata_pcmcia
hp_wmi                 18202  0 
memstick               16811  1 r592
hp_accel               26012  0 
lis3lv02d              20280  1 hp_accel
psmouse               104093  0 
snd_page_alloc         18798  2 snd_hda_intel,snd_pcm
sparse_keymap          13890  1 hp_wmi
video                  19574  0 
input_polldev          13896  1 lis3lv02d
mxm_wmi                13021  0 
serio_raw              13413  0 
mac_hid                13253  0 
nand_ecc               13312  1 nand
yenta_socket           45426  0 
cfg80211              499466  3 iwldvm,mac80211,iwlwifi
drm                   306660  2 nvidia
pcmcia_rsrc            18591  1 yenta_socket
pcmcia_core            23715  3 pcmcia,yenta_socket,pcmcia_rsrc
mei_me                 18418  0 
tpm_infineon           17410  0 
mei                    78537  1 mei_me
intel_ips              18520  0 
wmi                    19256  2 hp_wmi,mxm_wmi
ppdev                  17711  0 
tpm_tis                19255  0 
lpc_ich                21163  0 
parport_pc             32866  1 
lp                     17799  0 
parport                42466  3 ppdev,parport_pc,lp
hid_logitech_dj        18767  0 
usbhid                 53329  0 
hid                   106315  2 hid_logitech_dj,usbhid
firewire_ohci          45076  0 
sdhci_pci              19072  0 
sdhci                  43292  1 sdhci_pci
firewire_core          65168  1 firewire_ohci
crc_itu_t              12707  1 firewire_core
ahci                   30063  3 
libahci                32118  1 ahci
e1000e                257955  0 
ptp                    18627  1 e1000e
pps_core               19056  1 ptp

nm-tool

NetworkManager Tool

State: connected (global)

- Device: wlan0  [netgear] -----------------------------------------------------
Type:              802.11 WiFi
Driver:            iwlwifi
State:             connected
Default:           yes
HW Address:        18:3D:A2:3B:2F:7C

Capabilities:
Speed:           54 Mb/s

Wireless Properties
WEP Encryption:  yes
WPA Encryption:  yes
WPA2 Encryption: yes

Wireless Access Points (* = current AP)
5440 5744:       Infra, A4:52:6F:9E:0A:41, Freq 2462 MHz, Rate 54 Mb/s, Strength 30 WPA WPA2
xzt-04934:       Infra, 00:22:10:A6:3C:C0, Freq 2437 MHz, Rate 54 Mb/s, Strength 24 WPA WPA2
*netgear:        Infra, 20:4E:7F:7A:49:AC, Freq 2412 MHz, Rate 54 Mb/s, Strength 78 WPA2

IPv4 Settings:
Address:         10.0.0.14
Prefix:          24 (255.255.255.0)
Gateway:         10.0.0.1

DNS:             10.0.0.1


- Device: eth0 -----------------------------------------------------------------
Type:              Wired
Driver:            e1000e
State:             unavailable
Default:           no
HW Address:        B4:99:BA:E4:34:B0

Capabilities:
Carrier Detect:  yes

Wired Properties
Carrier:         off

Thank you in advance!

cyrill_10

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