WiFi Intel Centrino Wireless-N 1030 BGN does not go higher than 150Mbps

[baltic]

I've got this WiFi card:
02:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 1030 [Rainbow Peak] [8086:008a] (rev 34)
 Subsystem: Intel Corporation Centrino Wireless-N 1030 BGN [8086:5325]
 Kernel driver in use: iwlwifi
Under Ubuntu 14.04 it only goes as high as 150Mbps. Under Windows same card goes all the way to 300Mbps DL speed.
Please note that the card is 1x2. e.g. 150Mbps Up and 300Mbps Down. Maybe that causes the problem.
after
iwconfig wlan rate 300M
it fell to 1Mbps and stays there even after switching it back to auto
sudo iwconfig wlan0 rate auto

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-35-generic 3.13.0-35.62
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ds 1858 F.... pulseaudio
 /dev/snd/controlC0: ds 1858 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Sep 23 02:29:17 2014
InstallationDate: Installed on 2014-09-17 (5 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: GIGABYTE MMLP5AP-00
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.13.0-35-generic.efi.signed root=/dev/sda2 ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-35-generic N/A
 linux-backports-modules-3.13.0-35-generic N/A
 linux-firmware 1.127.6
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/29/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F2
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MMLP5AP-00
dmi.board.vendor: GIGABYTE
dmi.board.version: 1.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 10
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF2:bd08/29/2013:svnGIGABYTE:pnMMLP5AP-00:pvr1.x:rvnGIGABYTE:rnMMLP5AP-00:rvr1.x:cvnToBeFilledByO.E.M.:ct10:cvrToBeFilledByO.E.M.:
dmi.product.name: MMLP5AP-00
dmi.product.version: 1.x
dmi.sys.vendor: GIGABYTE

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.17 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc6-utopic/

[baltic (bugsgenerator)]

Done