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Hi,
I've recently reinstalled Arch after trying out (and disliking) fedora for a while. However, I have also switched from wired to wireless connection, using a ralink usb dongle, chipset RT5370. The problem is I get very unstable speeds. My connection should be at 30mbps down at all time (and it is with the same usb dongle on the same pc when I boot into windows 7), but now it oscillates between 30mbps and 1kbps every few seconds, which makes updating large files with pacman nearly unusable. I tried searching all over the internet to find a solution but to no avail. The issues people seem to experience with my chipset is being unable to connect to their network, while I can connect perfectly, only the speed is unstable. Anyway, here are the results of some relevant commands:
lsusb:
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 04d9:3015 Holtek Semiconductor, Inc.
Bus 001 Device 004: ID 046d:c068 Logitech, Inc. G500 Laser Mouse
Bus 001 Device 005: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter
lsmod | grep rt:
rt2800usb 17327 0
rt2x00usb 9012 1 rt2800usb
rt2800lib 47169 1 rt2800usb
rt2x00lib 36280 3 rt2x00usb,rt2800lib,rt2800usb
mac80211 424764 3 rt2x00lib,rt2x00usb,rt2800lib
iTCO_vendor_support 1929 1 iTCO_wdt
cfg80211 176994 2 mac80211,rt2x00lib
crc_ccitt 1363 1 rt2800lib
usbcore 150398 5 rt2x00usb,rt2800usb,ehci_hcd,usbhid,xhci_hcd
dmesg | grep rt2:
[ 4.114118] Registered led device: rt2800usb-phy0::radio
[ 4.114128] Registered led device: rt2800usb-phy0::assoc
[ 4.114137] Registered led device: rt2800usb-phy0::quality
[ 4.114147] usbcore: registered new interface driver rt2800usb
ifconfig wlan0:
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.116 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::fad1:11ff:fe19:7634 prefixlen 64 scopeid 0x20<link>
ether f8:d1:11:19:76:34 txqueuelen 1000 (Ethernet)
RX packets 140885 bytes 181682191 (173.2 MiB)
RX errors 0 dropped 3 overruns 0 frame 0
TX packets 86225 bytes 14715332 (14.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
And here's an image from speedtest.net which shows you the kind of drops I'm talking about:
Don't assume the drops happen only on speedtest, I first noticed them when installing the system and downloading large files on pacman. Sometimes it would drop below 1kbps for extended periods of time, up to 15 minutes. I'd get a lot of "Operation too slow. Less than 1024 bytes/sec transferred the last 10 seconds", so I check on speedtest to confirm the results.
I noticed I have both rt2800 and rt2x00 modules running. I don't know if that's normal or if I ought to only have either. I tried blacklisting either, but without success.
Has anyone experienced something like this? If so, how did you solve it?
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Can you somehow reduce the maximum Bitrate you are recieving (This should be possible somehow, I just never was in need to do it, so I can not say how to do it)? Looks to me like Flow Control of the network. But don't count on that, it's just a guess, I don't know where you access Internet (and I never had a problem like that).
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It is normal that the rt2800 and rt2x00 modules run at the same time - dont blacklist those.
One reason for network speed going down that much may be bad reception/interference by other devices. You could try changing the channel on the router.
Another thing to try the proprietary ralink module. Have a look here: http://ubuntuforums.org/archive/index.p … 00178.html
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