problem with Intel Centrino Wireless-N 1000 BGN


installed openSuse 13.2 on a Thinkpad X121e
this notebook used to work fine with previous versions

now I have a problem with my wifi,
if works for short time, slows donw , stops, works slow …

as said, it worked previous, othe rlinux noteboos int the network have no problems

27: PCI 200.0: 0282 WLAN controller
[Created at pci.328]
Unique ID: qru8.OmvKrQrlkKB
Parent ID: qTvu.brlZUkkVm89
SysFS ID: /devices/pci0000:00/0000:00:1c.1/0000:02:00.0
SysFS BusID: 0000:02:00.0
Hardware Class: network
Model: “Intel Centrino Wireless-N 1000 BGN”
Vendor: pci 0x8086 “Intel Corporation”
Device: pci 0x0084 “Centrino Wireless-N 1000 [Condor Peak]”
SubVendor: pci 0x8086 “Intel Corporation”
SubDevice: pci 0x1315 “Centrino Wireless-N 1000 BGN”
Driver: “iwlwifi”
Driver Modules: “iwlwifi”
Device File: wlp2s0
Features: WLAN
Memory Range: 0xd1500000-0xd1501fff (rw,non-prefetchable)
IRQ: 43 (39702 events)
HW Address: 74:e5:0b:7d:18:e8
Link detected: yes
WLAN channels: 1 2 3 4 5 6 7 8 9 10 11 12 13
WLAN frequencies: 2.412 2.417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 2.472
WLAN encryption modes: WEP40 WEP104 TKIP CCMP
WLAN authentication modes: open sharedkey wpa-psk wpa-eap
Module Alias: “pci:v00008086d00000084sv00008086sd00001315bc02sc80i00”
Driver Info #0:
Driver Status: iwlwifi is active
Driver Activation Cmd: “modprobe iwlwifi”
Config Status: cfg=no, avail=yes, need=no, active=unknown
Attached to: #20 (PCI bridge)

anyone any idea wat the problem could be?

The symptoms you describe can be caused by a less than optimal network connection or an untuned Linux network configuration.

Although I wrote a long article based on an older version of openSUSE, everything in it still applies today, in particular changing your TCP/IP Congestion Control algorithm.

In fact, towards the end, I describe my early experience running a P-P torrent application over WiFi (both activities which are highly contrary to a default Linux configuration) which you might notice closely matches what you describe until I made my modifications.

The above link describes how to not only choose and change your TCP/IP Congestion Control algorithm, but also configuring TCP/IP buffers if your machine has ample amounts of physical RAM while not running any particularly heavy non-networking load.