xvedejas
July 8th, 2011, 02:01 AM
I bought a Serval Pro back in April, and things had been working just fine since then. The wifi was working perfectly, with speed of up to 15Mbps. But a week or two ago, in Ubuntu 10.10, my wifi stopped working correctly, probably due to an update.
The download speed has been very slow, below 1Mbps speeds (but the upload speed is mostly unaffected, and usually around 2.5Mbps). The shown signal for my wireless is a bit lower than usual, but not by a significant amount. At first I thought it was a problem with my router, so I replaced it, to no luck. Then I read a few forum posts about wifi issues, saying they had been fixed by upgrading to 11.04, which I had not done yet. Now I've upgraded, and my wireless Internet is no better than before.
Here is some relevant information:
lspci | grep Network
Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
sudo lshw -C network
*-network
description: Ethernet interface
product: JMC250 PCI Express Gigabit Ethernet Controller
vendor: JMicron Technology Corp.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 05
serial: 00:90:f5:b7:89:a2
size: 10Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msix msi bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=jme driverversion=1.0.7 duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:56 memory:f6320000-f6323fff ioport:d100(size=128) ioport:d000(size=256) memory:f6310000-f631ffff memory:f6300000-f630ffff
*-network
description: Wireless interface
product: Centrino Ultimate-N 6300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
version: 35
serial: 00:24:d7:90:e0:78
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn driverversion=2.6.38-8-generic firmware=9.221.4.1 build 25532 ip=192.168.1.148 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:54 memory:f6200000-f6201fff
Doing a simple ping shows lots of latency. Last time I tried this, most pings were lost as well.
ping google.com
PING google.com (74.125.93.147) 56(84) bytes of data.
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=1 ttl=53 time=5055 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=2 ttl=53 time=4217 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=3 ttl=53 time=5528 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=4 ttl=53 time=5058 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=5 ttl=53 time=5035 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=6 ttl=53 time=5093 ms
--- google.com ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5006ms
rtt min/avg/max/mdev = 4217.110/4998.073/5528.088/389.085 ms, pipe 6
The download speed has been very slow, below 1Mbps speeds (but the upload speed is mostly unaffected, and usually around 2.5Mbps). The shown signal for my wireless is a bit lower than usual, but not by a significant amount. At first I thought it was a problem with my router, so I replaced it, to no luck. Then I read a few forum posts about wifi issues, saying they had been fixed by upgrading to 11.04, which I had not done yet. Now I've upgraded, and my wireless Internet is no better than before.
Here is some relevant information:
lspci | grep Network
Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
sudo lshw -C network
*-network
description: Ethernet interface
product: JMC250 PCI Express Gigabit Ethernet Controller
vendor: JMicron Technology Corp.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 05
serial: 00:90:f5:b7:89:a2
size: 10Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msix msi bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=jme driverversion=1.0.7 duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:56 memory:f6320000-f6323fff ioport:d100(size=128) ioport:d000(size=256) memory:f6310000-f631ffff memory:f6300000-f630ffff
*-network
description: Wireless interface
product: Centrino Ultimate-N 6300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
version: 35
serial: 00:24:d7:90:e0:78
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn driverversion=2.6.38-8-generic firmware=9.221.4.1 build 25532 ip=192.168.1.148 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:54 memory:f6200000-f6201fff
Doing a simple ping shows lots of latency. Last time I tried this, most pings were lost as well.
ping google.com
PING google.com (74.125.93.147) 56(84) bytes of data.
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=1 ttl=53 time=5055 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=2 ttl=53 time=4217 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=3 ttl=53 time=5528 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=4 ttl=53 time=5058 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=5 ttl=53 time=5035 ms
64 bytes from qw-in-f147.1e100.net (74.125.93.147): icmp_req=6 ttl=53 time=5093 ms
--- google.com ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5006ms
rtt min/avg/max/mdev = 4217.110/4998.073/5528.088/389.085 ms, pipe 6