My thinkpad is almost the same model number as yours. I've noticed that I get good speeds (5+mb/sec) over the wifi in Windows, but only around 40kb/sec in Linux. I'm guessing poor Linux driver support is to blame. Although that can't explain your situation if it used to be fast. Try running inSSIDer (or similar) to see if your neighbours have recently started broadcasting on the same channels as your AP? On 1 November 2013 15:14, Russell Coker <russell@coker.com.au> wrote:
My home Wifi network used to allow me to FTP files to my Android phones at rates exceeding 1MB/s, I think that 1.9MB/s was my record. With that sort of speed transferring a 200MB or 300MB TV show to a phone was reasonably quick. Performance wasn't always great, sometimes it was as low as 400KB/s, but even that was usable. In the past I had even watched TV shows on my phone over HTTP (from a local server) with no performance problems. In the last few days performance has dropped to below 60KB/s with rates like 40KB/s (that would be 320Kb/s) being common.
Because Android doesn't let me know what's happening I connected my Thinkpad T420 via Wifi and saw the following result:
# iwconfig wlan0 wlan0 IEEE 802.11abgn ESSID:"abcdef" Mode:Managed Frequency:2.412 GHz Access Point: AA:AA:AA:AA:AA:AA Bit Rate=1 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on Link Quality=70/70 Signal level=-30 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:286 Invalid misc:11 Missed beacon:0
What's going on here? I ran "iwconfig wlan0 rate auto" which made it briefly claim a rate of "130 Mb/s" but then it reported 1Mb/s again. 1Mb/s rate for the Wifi connection would be expected to give something like 40KB/s FTP transfer speed so it seems that the phones are connecting in the same way as my laptop.
It says that "abgn" is supported which should give lots of options for rates higher than 1Mb/s, especially when the quality is 70/70 and the Wifi access point (a Netgear DGN 2200 ADSL modem) is about 2M away from my laptop with nothing of note in between.
Any suggestions for what I can do to improve performance?
-- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/
_______________________________________________ luv-main mailing list luv-main@luv.asn.au http://lists.luv.asn.au/listinfo/luv-main
-- Turning and turning in the widening gyre The falcon cannot hear the falconer Things fall apart; the center cannot hold Mere anarchy is loosed upon the world