WiFI extremely slow in Arch

I have a new install of Arch after deciding to give it a go after 6 or 7 years on Gentoo.
The only problem I am experiencing is extremely slow internet. 1.58Mbps vs 31Mbps previously in Gentoo.
Google seems to indicate a lot of people have similar issues with Arch, but having followed the Wiki to the letter and not finding any solutions on Google I am stuck at where to start.
iw dev
phy#0
Interface wlp0s29u1u5
ifindex 3
wdev 0x1
addr c4:3d:c7:ca:85:02
type managed
channel 1 (2412 MHz), width: 20 MHz, center1: 2412 MHz
Please let me know what logs to upload, any assistance appreciated. I will continue to search myself.

If you are using a USB WiFi device that can potentially change names with different ports, it would probably make sense to either create a persistent name for that particular piece of hardware, or go back to the old naming scheme if you don't have another wireless card. The idea of these crazy names is that if you have two wireless cards, two ethernet cards, or even an ethernet card and a broadcom wireless card (which also uses the eth* namespace), you will never know which will be 0 and which will be 1. But if you tell the system what to name them, then you can at least have your netctl service run on a given interface name and know what it is going to be.
Having said all that, you should also be aware that other network management solutions deal with changing interface names much better then netctl. Netctl needs the interface name to be specified in the profile, so if it changes you are kind sh*t out of luck until you make the manual changes necessary.
To see if you have multiple network management services trying to handle things, run "systemctl --type=service" to see all the services you have going. If you see more than one that should be handling the network (for example, if you enabled [email protected] during setup) then you need to figure out which single management solution is going to best fit your use case and go with that one only. Most commonly, people still ahve dhcpcd.service or dhcpcd@<interface>.service around. But it is also not uncommon to see people with netctl-ifplugd@<interface>.service running along with netctl-auto@<interface> at the same time, which will also cause issues.

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Hi guys,
First post here so be gentle.
After a week or so of using Arch I started noticing some strange things happening so far:
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Thanks in advance!
PS: in one of the forums i asked someone asked me to post the output of dmesg | grep -i iwlagn, so here it is:
pastebin.com/Pmhi6swv
PS2: This problem does not occur in any of the Windows machines that are connected to the wireless network nor does it happen when this exact machine runs Windows; so the problem is definitely in Linux
Last edited by gzaidman (2011-06-01 20:18:37)

I'm kind of having a similar problem. Ever since upgrading to 2.6.39 my wifi is extremely slow. It connects in g mode according to iwconfig and other network analyzing programs. I have iwl3945. The problem is. First it connects to wifi network(which takes about 30secs to successfully complete a connection request) it works great and I'm measuring 25Mbit(which is my internet connection speed) on speedtest.net. But after some minutes my speed drops to around 100KB/s and has a slight fluctuation, not quite constant. Even the upload is bigger than the download speed. If I disconnect the wifi, reload the kernel module and reconnect, then it works again for 1-2 minutes at full speed, then the speed drops again.
http://www.speedtest.net/result/1338532978.png
Any suggestions, or ideas would be very helpful. Thank you.
btw. I use NetworkManager and kernel 2.6.39
iwconfig output:
wlan0 IEEE 802.11abg ESSID:"Kozma2"
Mode:Managed Frequency:2.442 GHz Access Point: 00:23:54:14:CE:E6
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=50/70 Signal level=-60 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:37462 Missed beacon:0

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I think I solved the wifi connection problem, just by switching off completely the router! sounds trivial, but in this case it worked!!!
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Quote from: Rostan;108703
I have two routers both work fine. Only thing that has issues is the GS60 and GS70
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Quote from: Rostan;108706
This guy is in the process of trouble shooting an issue with the Drivers and has not found a solution so there is nothing useful from this.
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Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
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4. Go into your router security settings and change from WEP to WPA with AES.
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http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
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http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
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http://ipadnerds.com/fix-wifi-issue-ios-7/
Fix WiFi Issue for iOS 7
http://ipadnerds.com/fix-wifi-issue-ios-7/
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http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.h tm
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Sig nal.htm
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

WiFI extremely slow in Arch

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