Ubuntu 14.04 slow wifi

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Philip Germanov

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Jul 16, 2014
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Yesterday I installed dual boot ubuntu and Windows but the wifi on Ubuntu is super slow, but on Windows is perfectly fine. How do I fix it?
 
Solution
markwp
Ok.

In terminal run:

sudo gedit /etc/modprobe.d/iwlwifi.conf

This will give you the wireless conf file.

At the bottom of the file, press enter to give yourself a blank line, then enter:

options iwlwifi 11n_disable=1

Save the file and reboot, then test speeds.
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P

Philip Germanov

Reputable
Jul 16, 2014
23
0
4,510
Code: 
lenovou400
    description: Notebook
    product: 09932MU (System SKUNumber)
    vendor: LENOVO
    version: Lenovo IdeaPad U400
    width: 64 bits
    capabilities: smbios-2.6 dmi-2.6 vsyscall32
    configuration: administrator_password=unknown boot=normal chassis=notebook family=HuronRiver System frontpanel_password=unknown keyboard_password=unknown power-on_password=unknown sku=System SKUNumber uuid=18C579A0-4AFD-11E1-B284-E4E3FF5147BF
  *-core
       description: Motherboard
       product: Emerald Lake
       vendor: LENOVO
       physical id: 0
       version: FAB1
       serial: WB04812803
       slot: Part Component
     *-firmware
          description: BIOS
          vendor: LENOVO
          physical id: 0
          version: 57CN30WW
          date: 12/05/2011
          size: 128KiB
          capacity: 2496KiB
          capabilities: pci upgrade shadowing cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer int10video pc98 acpi usb biosbootspecification netboot
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz
          vendor: Intel Corp.
          physical id: 30
          bus info: cpu@0
          version: Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz
          serial: Not Supported by CPU
          slot: CPU
          size: 1GHz
          capacity: 1GHz
          width: 64 bits
          clock: 100MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid cpufreq
          configuration: cores=2 enabledcores=2 threads=4
        *-cache:0
             description: L1 cache
             physical id: 31
             slot: L1-Cache
             size: 64KiB
             capacity: 64KiB
             capabilities: synchronous internal write-through data
        *-cache:1
             description: L2 cache
             physical id: 32
             slot: L2-Cache
             size: 256KiB
             capacity: 256KiB
             capabilities: synchronous internal write-through data
        *-cache:2
             description: L3 cache
             physical id: 33
             slot: L3-Cache
             size: 3MiB
             capacity: 3MiB
             capabilities: synchronous internal write-back unified
     *-memory
          description: System Memory
          physical id: 34
          slot: System board or motherboard
          size: 6GiB
        *-bank:0
             description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
             product: M471B5273DH0-CH9
             vendor: Samsung
             physical id: 0
             serial: 610CB46F
             slot: ChannelA-DIMM0
             size: 4GiB
             width: 64 bits
             clock: 1333MHz (0.8ns)
        *-bank:1
             description: DIMMProject-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>POT-Creation-Date: 2009-10-08 14:02+0200PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <en_GB@li.org>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2014-07-07 12:12+0000X-Generator: Launchpad (build 17086) [empty]
             physical id: 1
             slot: ChannelA-DIMM1
        *-bank:2
             description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
             product: M471B5773DH0-CH9
             vendor: Samsung
             physical id: 2
             serial: 00599872
             slot: ChannelB-DIMM0
             size: 2GiB
             width: 64 bits
             clock: 1333MHz (0.8ns)
        *-bank:3
             description: DIMMProject-Id-Version: lshwReport-Msgid-Bugs-To: FULL NAME <EMAIL@ADDRESS>POT-Creation-Date: 2009-10-08 14:02+0200PO-Revision-Date: 2012-02-05 00:26+0000Last-Translator: Andi Chandler <Unknown>Language-Team: English (United Kingdom) <en_GB@li.org>MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2014-07-07 12:12+0000X-Generator: Launchpad (build 17086) [empty]
             physical id: 3
             slot: ChannelB-DIMM1
     *-pci
          description: Host bridge
          product: 2nd Generation Core Processor Family DRAM Controller
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 09
          width: 32 bits
          clock: 33MHz
        *-pci:0
             description: PCI bridge
             product: Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port
             vendor: Intel Corporation
             physical id: 1
             bus info: pci@0000:00:01.0
             version: 09
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:40 ioport:2000(size=4096) memory:f0600000-f06fffff ioport:d0000000(size=268435456)
           *-generic
                description: Unassigned class
                product: Illegal Vendor ID
                vendor: Illegal Vendor ID
                physical id: 0
                bus info: pci@0000:01:00.0
                version: ff
                width: 32 bits
                clock: 66MHz
                capabilities: bus_master vga_palette cap_list rom
                configuration: driver=radeon latency=255 maxlatency=255 mingnt=255
                resources: irq:16 memory:d0000000-dfffffff memory:f0600000-f061ffff ioport:2000(size=256) memory:f0620000-f063ffff
        *-display
             description: VGA compatible controller
             product: 2nd Generation Core Processor Family Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 09
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:50 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:3000(size=64)
        *-communication
             description: Communication controller
             product: 6 Series/C200 Series Chipset Family MEI Controller #1
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 04
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: irq:48 memory:f0725000-f072500f
        *-network
             description: Ethernet interface
             product: 82579V Gigabit Network Connection
             vendor: Intel Corporation
             physical id: 19
             bus info: pci@0000:00:19.0
             logical name: eth0
             version: 05
             serial: f0:de:f1:c2:6f:d1
             width: 32 bits
             clock: 33MHz
             capabilities: pm msi cap_list ethernet physical
             configuration: broadcast=yes driver=e1000e latency=0 multicast=yes
             resources: irq:20 memory:f0700000-f071ffff memory:f072b000-f072bfff ioport:3080(size=32)
        *-usb:0
             description: USB controller
             product: 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2
             vendor: Intel Corporation
             physical id: 1a
             bus info: pci@0000:00:1a.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci-pci latency=0
             resources: irq:16 memory:f072a000-f072a3ff
        *-multimedia
             description: Audio device
             product: 6 Series/C200 Series Chipset Family High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 05
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:51 memory:f0720000-f0723fff
        *-pci:1
             description: PCI bridge
             product: 6 Series/C200 Series Chipset Family PCI Express Root Port 1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: b5
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode cap_list
             configuration: driver=pcieport
             resources: irq:16
        *-pci:2
             description: PCI bridge
             product: 6 Series/C200 Series Chipset Family PCI Express Root Port 2
             vendor: Intel Corporation
             physical id: 1c.1
             bus info: pci@0000:00:1c.1
             version: b5
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:17 memory:f0500000-f05fffff
           *-network
                description: Wireless interface
                product: Centrino Wireless-N 1030 [Rainbow Peak]
                vendor: Intel Corporation
                physical id: 0
                bus info: pci@0000:03:00.0
                logical name: wlan0
                version: 34
                serial: 4c:eb:42:1c:1d:08
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-37-generic firmware=18.168.6.1 ip=192.168.1.71 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
                resources: irq:49 memory:f0500000-f0501fff
        *-pci:3
             description: PCI bridge
             product: 6 Series/C200 Series Chipset Family PCI Express Root Port 5
             vendor: Intel Corporation
             physical id: 1c.4
             bus info: pci@0000:00:1c.4
             version: b5
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16 memory:f0400000-f04fffff
           *-usb
                description: USB controller
                product: uPD720200 USB 3.0 Host Controller
                vendor: NEC Corporation
                physical id: 0
                bus info: pci@0000:04:00.0
                version: 04
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi msix pciexpress xhci bus_master cap_list
                configuration: driver=xhci_hcd latency=0
                resources: irq:16 memory:f0400000-f0401fff
        *-usb:1
             description: USB controller
             product: 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci-pci latency=0
             resources: irq:23 memory:f0729000-f07293ff
        *-isa
             description: ISA bridge
             product: HM65 Express Chipset Family LPC Controller
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master cap_list
             configuration: driver=lpc_ich latency=0
             resources: irq:0
        *-storage
             description: SATA controller
             product: 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller
             vendor: Intel Corporation
             physical id: 1f.2
             bus info: pci@0000:00:1f.2
             version: 05
             width: 32 bits
             clock: 66MHz
             capabilities: storage msi pm ahci_1.0 bus_master cap_list
             configuration: driver=ahci latency=0
             resources: irq:46 ioport:30a8(size=8) ioport:30b4(size=4) ioport:30a0(size=8) ioport:30b0(size=4) ioport:3060(size=32) memory:f0728000-f07287ff
        *-serial UNCLAIMED
             description: SMBus
             product: 6 Series/C200 Series Chipset Family SMBus Controller
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 05
             width: 64 bits
             clock: 33MHz
             configuration: latency=0
             resources: memory:f0724000-f07240ff ioport:efa0(size=32)
     *-scsi:0
          physical id: 1
          logical name: scsi1
          capabilities: emulated
        *-disk
             description: ATA Disk
             product: ST500LT012-1DG14
             vendor: Seagate
             physical id: 0.0.0
             bus info: scsi@1:0.0.0
             logical name: /dev/sda
             version: 0001
             serial: W3P5G9QR
             size: 465GiB (500GB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 sectorsize=4096 signature=f3f3a5ed
           *-volume:0
                description: Windows NTFS volume
                physical id: 1
                bus info: scsi@1:0.0.0,1
                logical name: /dev/sda1
                version: 3.1
                serial: bc5f9fc3-8abe-0b4c-b69f-e204b9481fb3
                size: 172GiB
                capacity: 172GiB
                capabilities: primary bootable ntfs initialized
                configuration: clustersize=4096 created=2014-09-30 02:56:37 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
           *-volume:1
                description: Extended partition
                physical id: 2
                bus info: scsi@1:0.0.0,2
                logical name: /dev/sda2
                size: 292GiB
                capacity: 292GiB
                capabilities: primary extended partitioned partitioned:extended
              *-logicalvolume:0
                   description: HPFS/NTFS partition
                   physical id: 5
                   logical name: /dev/sda5
                   capacity: 197GiB
              *-logicalvolume:1
                   description: Linux filesystem partition
                   physical id: 6
                   logical name: /dev/sda6
                   logical name: /
                   capacity: 93GiB
                   configuration: mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered state=mounted
              *-logicalvolume:2
                   description: Linux swap / Solaris partition
                   physical id: 7
                   logical name: /dev/sda7
                   capacity: 1903MiB
                   capabilities: nofs
     *-scsi:1
          physical id: 2
          logical name: scsi4
          capabilities: emulated
        *-cdrom
             description: DVD-RAM writer
             product: DVD-RAM UJ8A7AS
             vendor: MATSHITA
             physical id: 0.0.0
             bus info: scsi@4:0.0.0
             logical name: /dev/cdrom
             logical name: /dev/sr0
             version: SB51
             capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
             configuration: ansiversion=5 status=open
  *-battery
       product: Smart Battery
       vendor: Intel Corp.
       physical id: 1
       version: 2008
       serial: 1.0
       slot: Rear
  *-power UNCLAIMED
       description: TBD by ODM
       product: TBD by ODM
       vendor: TBD by ODM
       physical id: 2
       version: 1.0
       serial: TBD by ODM
       capacity: 32768mWh

The speed differences are massive. On ubuntu I can barely open a page, on Windows or on my phone it's perfectly fine.
 
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markwp

markwp

Dignified
Jan 22, 2013
3,183
0
14,960
In ubuntu terminal, enter:

sudo modprobe -r iwlwifi
then enter your password at the prompt and press enter

then enter:

sudo modprobe iwlwifi 11n_disable=1 and press enter

See if that improves the speed and report back.
 
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markwp

markwp

Dignified
Jan 22, 2013
3,183
0
14,960
Ok.

In terminal run:

sudo gedit /etc/modprobe.d/iwlwifi.conf

This will give you the wireless conf file.

At the bottom of the file, press enter to give yourself a blank line, then enter:

options iwlwifi 11n_disable=1

Save the file and reboot, then test speeds.
 
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Solution
skittle

skittle

Splendid
Dec 27, 2006
4,036
3
23,960
You can try different paramaters:
Code: 
modinfo iwlwifi
Code: 
parm:           swcrypto:using crypto in software (default 0 [hardware]) (int)
parm:           11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm:           amsdu_size_8K:enable 8K amsdu size (default 0) (int)
parm:           fw_restart:restart firmware in case of error (default true) (bool)
parm:           antenna_coupling:specify antenna coupling in dB (defualt: 0 dB) (int)
parm:           wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable (default: 1) (int)
parm:           nvm_file:NVM file name (charp)
parm:           uapsd_disable:disable U-APSD functionality (default: N) (bool)
parm:           bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm:           led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm:           power_save:enable WiFi power management (default: disable) (bool)
parm:           power_level:default power save level (range from 1 - 5, default: 1) (int)

maybe in addition to setting 11n_disable=1 you also need to set your router to bg mode instead of bgn mode.

setting 'swcrypt=1' or other combination of parameter may be useful. You will have to experiment.

In addition this may be a bug that has been fixed in a newer kernel. 3.13 is already quite old.
Try the Ubuntu 14.10 Beta2 LiveCD/LiveUSB and see if the problem is still present. 14.10 comes with Kernel 3.16.
http://releases.ubuntu.com/utopic/
 
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N

nick1990

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May 28, 2015
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0
4,510
Seems I need one more answer to slow Huawei e5220 3G ubuntu 14.04.2 64 bit http://www.tomshardware.co.uk/answers/id-2660986/ubuntu-bit-slow-huawei-e5220-air-net.html, thanks
 
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