Yesterday I have upgraded to Ubuntu 13.04. After I upgrade, I have a serious problem with network (I use wire network): my network is unstable. After a short time using it, it often disconnects. It means the connected sign on taskbar is normal, but I can not browse the internet anymore.
The only solution that I have is unplug network, and plug again, and network runs smoothly again. I don't know why this happen and I google but no answer.
I'm using laptop with core i5, and network card is onboard.
Here is my network card info after I run command :
sudo lshw -C network
*-network description: Wireless interface product: AR9285 Wireless Network Adapter (PCI-Express) vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 01 serial: d0:df:9a:e2:81:c7 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=3.8.0-19-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:17 memory:c0500000-c050ffff *-network description: Ethernet interface product: AR8151 v2.0 Gigabit Ethernet vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:04:00.0 logical name: eth0 version: c0 serial: e8:9a:8f:b9:af:57 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=188.8.131.52-NAPI duplex=full ip=192.168.1.100 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:49 memory:c0400000-c043ffff ioport:2000(size=128)
And here is my laptop information:
System Information Manufacturer: TOSHIBA Product Name: Satellite L755 Version: PSK1YL-006001 Serial Number: 9B077988W UUID: 2690FBA0-D81A-11E0-9FD1-E89A8FB9AF57 Wake-up Type: Power Switch SKU Number: PSK1YL-006001 Family: Intel_Mobile
Please help me about this issue.