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Thread: Can't get wifi connection over 150Mbps

  1. #1
    Join Date
    May 2013
    Beans
    5

    Can't get wifi connection over 150Mbps

    I'm trying to connect to my new router at a speed of 300Mbps. My new wireless router accepts 300Mbps in 2.4Mhz and 450Mbps in 5Mhz. I'm testing right next to the router and I get 150Mbps top.
    I'm pretty aware of what 150/300/450Mbps means in real life, but the thing is that connecting to 150Mbps won't give anything above 8MBps when transfering files over the network.
    I tested all the same in Windows 7 and I can get links of 300Mbps (fluctuating, but very stable at that speed), whit 22MBps for file transfers.
    Is there something I can do? Thank you!

    Adding info requested by "varunendra" (thank you!!!):



    uname -mr
    Code:
    3.5.0-28-generic i686

    lsb_release -d
    Code:
    Description:    Ubuntu 12.10

    lspci -nnk | grep -iA2 net
    Code:
    02:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection [8086:4237]
        Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1211]
        Kernel driver in use: iwlwifi
    --
    03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 02)
        Subsystem: Hewlett-Packard Company Device [103c:3624]
        Kernel driver in use: r8169

    lsmod
    Code:
    Module                  Size  Used by
    ipt_MASQUERADE         12664  0 
    xt_state               12515  0 
    ipt_REJECT             12486  0 
    xt_tcpudp              12532  0 
    nf_nat_h323            12810  0 
    nf_conntrack_h323      51811  1 nf_nat_h323
    nf_nat_pptp            12537  0 
    nf_conntrack_pptp      13554  1 nf_nat_pptp
    nf_conntrack_proto_gre    13581  1 nf_conntrack_pptp
    nf_nat_proto_gre       12672  1 nf_nat_pptp
    nf_nat_tftp            12421  0 
    nf_conntrack_tftp      12818  1 nf_nat_tftp
    nf_nat_sip             16946  0 
    nf_conntrack_sip       24511  1 nf_nat_sip
    nf_nat_irc             12543  0 
    nf_conntrack_irc       13113  1 nf_nat_irc
    nf_nat_ftp             12549  0 
    nf_conntrack_ftp       13107  1 nf_nat_ftp
    iptable_nat            12978  0 
    nf_nat                 20317  9 ipt_MASQUERADE,nf_nat_h323,nf_nat_pptp,nf_nat_proto_gre,nf_nat_tftp,nf_nat_sip,nf_nat_irc,nf_nat_ftp,iptable_nat
    nf_conntrack_ipv4      14081  3 iptable_nat,nf_nat
    nf_conntrack           66308  18 ipt_MASQUERADE,xt_state,nf_nat_h323,nf_conntrack_h323,nf_nat_pptp,nf_conntrack_pptp,nf_conntrack_proto_gre,nf_nat_tftp,nf_conntrack_tftp,nf_nat_sip,nf_conntrack_sip,nf_nat_irc,nf_conntrack_irc,nf_nat_ftp,nf_conntrack_ftp,iptable_nat,nf_nat,nf_conntrack_ipv4
    nf_defrag_ipv4         12650  1 nf_conntrack_ipv4
    snd_hrtimer            12649  1 
    vesafb                 13478  1 
    coretemp               13169  0 
    arc4                   12474  2 
    joydev                 17162  0 
    hp_wmi                 13617  0 
    sparse_keymap          13659  1 hp_wmi
    dm_multipath           22403  0 
    iptable_filter         12707  1 
    scsi_dh                14214  1 dm_multipath
    xt_owner               12451  12 
    ip_tables              17792  2 iptable_nat,iptable_filter
    x_tables               21936  8 ipt_MASQUERADE,xt_state,ipt_REJECT,xt_tcpudp,iptable_nat,iptable_filter,xt_owner,ip_tables
    snd_hda_codec_hdmi     31457  1 
    uvcvideo               71278  0 
    videobuf2_core         32071  1 uvcvideo
    videodev               95842  2 uvcvideo,videobuf2_core
    videobuf2_vmalloc      12757  1 uvcvideo
    videobuf2_memops       13213  1 videobuf2_vmalloc
    ir_lirc_codec          12740  0 
    lirc_dev               18671  1 ir_lirc_codec
    microcode              18210  0 
    ir_mce_kbd_decoder     12636  0 
    ir_sanyo_decoder       12466  0 
    snd_hda_codec_idt      59762  1 
    ir_sony_decoder        12463  0 
    ir_jvc_decoder         12460  0 
    psmouse                84878  0 
    serio_raw              13032  0 
    ir_rc6_decoder         12460  0 
    ir_rc5_decoder         12460  0 
    ir_nec_decoder         12460  0 
    lpc_ich                16926  0 
    fglrx                2917043  243 
    snd_hda_intel          32516  5 
    snd_hda_codec         111548  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
    snd_hwdep              13273  1 snd_hda_codec
    snd_seq_midi           13133  0 
    snd_pcm                80235  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    btusb                  17987  0 
    snd_rawmidi            25383  1 snd_seq_midi
    snd_seq_midi_event     14476  1 snd_seq_midi
    rc_rc6_mce             12455  0 
    snd_seq                51281  3 snd_seq_midi,snd_seq_midi_event
    ene_ir                 17908  0 
    jmb38x_ms              17178  0 
    rc_core                21267  11 ir_lirc_codec,ir_mce_kbd_decoder,ir_sanyo_decoder,ir_sony_decoder,ir_jvc_decoder,ir_rc6_decoder,ir_rc5_decoder,ir_nec_decoder,rc_rc6_mce,ene_ir
    rfcomm                 37277  12 
    snd_timer              24412  3 snd_hrtimer,snd_pcm,snd_seq
    memstick               15843  1 jmb38x_ms
    snd_seq_device         14138  3 snd_seq_midi,snd_rawmidi,snd_seq
    parport_pc             31969  0 
    bnep                   17708  2 
    iwlwifi               348525  0 
    wmi                    18591  1 hp_wmi
    snd                    62146  21 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    video                  18895  0 
    bluetooth             183270  22 btusb,rfcomm,bnep
    ppdev                  12818  0 
    mac80211              461261  1 iwlwifi
    hp_accel               25729  0 
    lis3lv02d              19230  1 hp_accel
    input_polldev          13649  1 lis3lv02d
    soundcore              14600  1 snd
    snd_page_alloc         14037  2 snd_hda_intel,snd_pcm
    cfg80211              175574  2 iwlwifi,mac80211
    mac_hid                13038  0 
    lp                     13300  0 
    parport                40754  3 parport_pc,ppdev,lp
    binfmt_misc            17261  1 
    hid_generic            12485  0 
    usbhid                 41734  0 
    hid                    82179  2 hid_generic,usbhid
    ahci                   25497  3 
    libahci                25938  1 ahci
    r8169                  55977  0 
    firewire_ohci          35522  0 
    sdhci_pci              18156  0 
    sdhci                  27831  1 sdhci_pci
    firewire_core          57493  1 firewire_ohci
    crc_itu_t              12628  1 firewire_core
    dm_raid45              75358  0 
    xor                    26091  1 dm_raid45
    dm_mirror              21666  0 
    dm_region_hash         16013  1 dm_mirror
    dm_log                 18138  3 dm_raid45,dm_mirror,dm_region_hash

    iwconfig
    Code:
    wlan0     IEEE 802.11abgn  ESSID:"Diegosolo5"  
              Mode:Managed  Frequency:5.18 GHz  Access Point: A0:F3:C1:8F:93:6C   
              Bit Rate=150 Mb/s   Tx-Power=14 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:on
              Link Quality=61/70  Signal level=-49 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:269  Invalid misc:1714   Missed beacon:0
    
    lo        no wireless extensions.
    
    eth0      no wireless extensions.

    ifconfig
    Code:
    eth0      Link encap:Ethernet  HWaddr 00:26:9e:10:af:42  
              UP BROADCAST MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
    
    lo        Link encap:Local Loopback  
              inet addr:127.0.0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:16436  Metric:1
              RX packets:8698 errors:0 dropped:0 overruns:0 frame:0
              TX packets:8698 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:792325 (792.3 KB)  TX bytes:792325 (792.3 KB)
    
    wlan0     Link encap:Ethernet  HWaddr 00:1e:65:82:f1:3a  
              inet addr:192.168.0.101  Bcast:192.168.0.255  Mask:255.255.255.0
              inet6 addr: fe80::21e:65ff:fe82:f13a/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:2302128 errors:0 dropped:144 overruns:0 frame:0
              TX packets:680971 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:3308302832 (3.3 GB)  TX bytes:69550481 (69.5 MB)
    PS: sorry about the font. I got that after an error in the submission.
    Last edited by diegosolo; May 21st, 2013 at 04:58 AM. Reason: Added requested info

  2. #2
    Join Date
    Mar 2010
    Location
    India
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    8,175
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Can't get wifi connection over 150Mbps!

    Hi, and Welcome to the forums diegosolo!

    Let us take a look at what device and driver you are using, then see if we can do anything to improve the speed.

    Please open a terminal (Ctrl + Alt + T), run the following commands (one at a time, you may copy-paste to avoid typos), and post back their outputs here :
    Code:
    uname -mr
    lsb_release -d
    lspci -nnk | grep -iA2 net
    lsmod
    iwconfig
    ifconfig

    PS:
    Please use default fonts unless necessary. It is more readable
    Last edited by varunendra; May 21st, 2013 at 03:50 AM.
    Varun
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  3. #3
    Join Date
    Dec 2010
    Beans
    9

    Re: Can't get wifi connection over 150Mbps!

    same deal heres my output...sketch@TimelineX:~$ uname -mr3.8.0-21-generic x86_64
    sketch@TimelineX:~$ lsb_release -d
    Description: Ubuntu 13.04
    sketch@TimelineX:~$ lspci -nnk | grep -iA2 net
    01:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8151 v1.0 Gigabit Ethernet [1969:1073] (rev c0)
    Subsystem: Acer Incorporated [ALI] Device [1025:040e]
    Kernel driver in use: atl1c
    02:00.0 Network controller [0280]: Intel Corporation Centrino Ultimate-N 6300 [8086:422b] (rev 35)
    Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN [8086:1101]
    Kernel driver in use: iwlwifi
    sketch@TimelineX:~$ lsmod
    Module Size Used by
    btusb 22474 0
    parport_pc 28152 0
    pci_stub 12622 1
    ppdev 17073 0
    vboxpci 23194 0
    vboxnetadp 25670 0
    bnep 18036 2
    rfcomm 42641 4
    bluetooth 228619 11 bnep,btusb,rfcomm
    vboxnetflt 23479 0
    vboxdrv 320372 3 vboxnetadp,vboxnetflt,vboxpci
    snd_hda_codec_hdmi 36913 1
    snd_hda_codec_realtek 78399 1
    arc4 12615 2
    uvcvideo 80847 0
    iwldvm 241834 0
    snd_hda_intel 39619 3
    videobuf2_vmalloc 13056 1 uvcvideo
    mac80211 606457 1 iwldvm
    snd_hda_codec 136453 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_i ntel
    videobuf2_memops 13202 1 videobuf2_vmalloc
    ums_realtek 17949 0
    videobuf2_core 40513 1 uvcvideo
    snd_hwdep 13602 1 snd_hda_codec
    usb_storage 57204 1 ums_realtek
    videodev 129260 2 uvcvideo,videobuf2_core
    kvm_intel 132891 0
    snd_pcm 97451 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
    kvm 443165 1 kvm_intel
    snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
    snd_seq_midi 13324 0
    snd_seq_midi_event 14899 1 snd_seq_midi
    ghash_clmulni_intel 13259 0
    snd_rawmidi 30180 1 snd_seq_midi
    joydev 17377 0
    aesni_intel 55399 1
    aes_x86_64 17255 1 aesni_intel
    iwlwifi 173477 1 iwldvm
    snd_seq 61554 2 snd_seq_midi_event,snd_seq_midi
    xts 12885 1 aesni_intel
    lrw 13257 1 aesni_intel
    gf128mul 14951 2 lrw,xts
    ablk_helper 13597 1 aesni_intel
    cryptd 20373 3 ghash_clmulni_intel,aesni_intel,ablk_helper
    snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
    i915 600351 7
    snd_timer 29425 2 snd_pcm,snd_seq
    acer_wmi 32467 0
    sparse_keymap 13890 1 acer_wmi
    cfg80211 510937 3 iwlwifi,mac80211,iwldvm
    drm_kms_helper 49394 1 i915
    drm 286313 3 i915,drm_kms_helper
    mei 41158 0
    snd 68876 16 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_ codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_cod ec,snd_hda_intel,snd_seq_device
    i2c_algo_bit 13413 1 i915
    wmi 19070 1 acer_wmi
    psmouse 95870 0
    coretemp 13355 0
    intel_ips 17978 0
    soundcore 12680 1 snd
    serio_raw 13215 0
    lpc_ich 17061 0
    lp 17759 0
    video 19390 2 i915,acer_wmi
    parport 46345 3 lp,ppdev,parport_pc
    mac_hid 13205 0
    microcode 22881 0
    ahci 25731 2
    libahci 31364 1 ahci
    atl1c 41071 0
    sketch@TimelineX:~$ iwconfig
    eth0 no wireless extensions.


    lo no wireless extensions.


    wlan0 IEEE 802.11abgn ESSID:"JJWZP"
    Mode:Managed Frequency:2.437 GHz Access Point: 00:26:B87:CC5
    Bit Rate=117 Mb/s Tx-Power=15 dBm
    Retry long limit:7 RTS thrff Fragment thrff
    Power Managementff
    Link Quality=70/70 Signal level=-26 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:833 Invalid misc:207 Missed beacon:0


    sketch@TimelineX:~$ ifconfig
    eth0 Link encap:Ethernet HWaddr 20:6a:8a:3e:f1:ac
    UP BROADCAST MULTICAST MTU:1500 Metric:1
    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
    TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)


    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:Host
    UP LOOPBACK RUNNING MTU:65536 Metric:1
    RX packets:2295 errors:0 dropped:0 overruns:0 frame:0
    TX packets:2295 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:206256 (206.2 KB) TX bytes:206256 (206.2 KB)


    wlan0 Link encap:Ethernet HWaddr 00:24:d7:00:45:d0
    inet addr:192.168.0.4 Bcast:192.168.0.255 Mask:255.255.255.0
    inet6 addr: fe80::224:d7ff:fe00:45d0/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:34951 errors:0 dropped:0 overruns:0 frame:0
    TX packets:30337 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:16592491 (16.5 MB) TX bytes:32191654 (32.1 MB)

  4. #4
    Join Date
    Mar 2010
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    India
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    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Can't get wifi connection over 150Mbps!

    Oh, sorry, I forgot to include the more important comment in my 'PS', "Please use 'Code' tags to post command outputs. It preserves their formatting and makes them look less scary.."
    Please follow the "Code Tags example" link in my signature to see how to use it. (oh, and then edit your above post to wrap the code part within 'Code' tags, it's really scaring me.. )

    Anyway, the important stuff -
    Quote Originally Posted by Sketchworks View Post
    sketch@TimelineX:~$ lspci -nnk | grep -iA2 net
    02:00.0 Network controller [0280]: Intel Corporation Centrino Ultimate-N 6300 [8086:422b] (rev 35)
    Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN [8086:1101]
    Kernel driver in use: iwlwifi
    Everything looks normal to me, except that this driver (iwlwifi) is often reported to have problem with N-channel (if I remember correctly). Not only this one, most of the linux wireless drivers I know of have difficulty with N-channel. Disheartening, I know, but this is what I have gathered so far, and I wish I'm wrong.

    Unless someone else can offer a better suggestion, please try -
    Code:
    sudo modprobe -rfv iwlwifi
    sudo modprobe -v iwlwifi swcrypto=1
    Does it make any difference? This is a temporary change and will be lost at reboot. We can make it permanent if it helps.

    PS:
    Don't forget to edit the previous post to wrap the output in 'Code' tags, you'll like it !

    EDIT:
    Just realized that I am answering two different users at the same time.
    However, since both of you are using the same driver (even though different kernel and OS versions), and have same complaints, what I suggested above is all I have to suggest. But please, do post if it makes any difference or not, as maybe someone else would be able to offer a better help if that doesn't help.

    Oh, and the 'Code' tags part also goes the same for both of you
    Last edited by varunendra; May 21st, 2013 at 04:55 AM.
    Varun
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  5. #5
    Join Date
    May 2013
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    5

    Re: Can't get wifi connection over 150Mbps!

    Sorry, but nothing has changed. I'm still stuck at 150Mbps. But thank you anyway!

  6. #6
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Can't get wifi connection over 150Mbps!

    Already suspected that

    However, there is one more thing in 'Your' output that can be altered hoping for a miracle -
    Quote Originally Posted by diegosolo View Post
    iwconfig
    Code:
    wlan0     IEEE 802.11abgn  ESSID:"Diegosolo5"  
              Mode:Managed  Frequency:5.18 GHz  Access Point: A0:F3:C1:8F:93:6C   
              Bit Rate=150 Mb/s   Tx-Power=14 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:on
              Link Quality=61/70  Signal level=-49 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:269  Invalid misc:1714   Missed beacon:0
    Try turning the power management off -
    Code:
    sudo iwconfig wlan0 power off
    Then check if it is correctly turned off -
    Code:
    iwconfig
    It should show up as "off" now. Does that make any difference? I'd try to search if someone has reported a better speed (if the time allows), but for now, I'm out of ammo !
    Varun
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  7. #7
    Join Date
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    Re: Can't get wifi connection over 150Mbps!

    This sounds pretty much like the problem I've hit. Didn't find this before I started this thread: http://ubuntuforums.org/showthread.php?t=2147017

    In my case, I'm limited to 150 mbps, but that is down to the router firmware. Under any of the 3.7.x kernels, I got consistent 150 mbps connects to my router. Under any of the 3.8.x kernels, I couldn't get anything better than 72.2 mbps.

    I normally use Arch, which has just moved on to the 3.9.3 kernel. My connect speed went straight back to 150 mbps, and, as of this morning (updated firmware for the WAG320N) I'm getting consistent 300 mbps connects.

    Given the results I've seen, I suspect you're not going to solve the problem unless you can either go to a more recent kernel, or backdate to one of the the 3.7.x kernels.

    I'm not familiar enough with Ubuntu to know how easy or possible either of those options is.....

    Paul.

  8. #8
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    Re: Can't get wifi connection over 150Mbps!

    Quote Originally Posted by toothandnail View Post
    This sounds pretty much like the problem I've hit. Didn't find this before I started this thread: http://ubuntuforums.org/showthread.php?t=2147017

    In my case, I'm limited to 150 mbps, but that is down to the router firmware. Under any of the 3.7.x kernels, I got consistent 150 mbps connects to my router. Under any of the 3.8.x kernels, I couldn't get anything better than 72.2 mbps.
    Yes, given the abnormal amount and nature of problems, the 3.8x series kernel is evidently a hell of wireless issues. We are facing the most unexpected regressions in almost all of the native wireless drivers, and at the same time, the proprietary ones are failing due to critical changes in the kernel code.

    Anyway, if you wish, you can directly download the other (supported) version of kernels from kernel-ppa mainline : http://kernel.ubuntu.com/~kernel-ppa/mainline/

    Just download the .deb package of the desired kernel, and double click to install (or dpkg -i ...).

    Let us know if you do and if it really helps. Reportedly, it does.
    Varun
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  9. #9
    Join Date
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    Re: Can't get wifi connection over 150Mbps!

    Quote Originally Posted by varunendra View Post
    Yes, given the abnormal amount and nature of problems, the 3.8x series kernel is evidently a hell of wireless issues. We are facing the most unexpected regressions in almost all of the native wireless drivers, and at the same time, the proprietary ones are failing due to critical changes in the kernel code.

    Anyway, if you wish, you can directly download the other (supported) version of kernels from kernel-ppa mainline : http://kernel.ubuntu.com/~kernel-ppa/mainline/

    Just download the .deb package of the desired kernel, and double click to install (or dpkg -i ...).

    Let us know if you do and if it really helps. Reportedly, it does.
    Thanks for that. Used the link you provided, downloaded and installed the 3.9.2 kernel and installed it. Just restarted the laptop and I'm getting 300 mbps connnection to the router again.

    Useful information also - I've got lots to learn about Ubunut....

    Paul.

  10. #10
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    Re: Can't get wifi connection over 150Mbps!

    Quote Originally Posted by toothandnail View Post
    Used the link you provided, downloaded and installed the 3.9.2 kernel and installed it. Just restarted the laptop and I'm getting 300 mbps connnection to the router again..
    Thanks to you too, that's a great confirmation for us solution hunters!

    I'm sure this particular kernel is going to be our most frequent suggestion for a few days..!
    Varun
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