I installed Ubuntu 11.10 on my home desktop and am having problems with the wireless network. It actually makes the connection, but it is so slow and unresponsive it is unusable.

My wireless network adapter is a D-Link DWL-G520 rev. B with an Atheros chipset, and this is the relevant output from running lspci.

$ sudo lspci -vvv

04:02.0 Ethernet controller: Atheros Communications Inc. AR5212/AR5213 Multiprotocol MAC/baseband processor (rev 01)

    Subsystem: D-Link System Inc AirPlus DWL-G520 Wireless PCI Adapter (rev. B)

    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-

    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

    Latency: 168 (2500ns min, 7000ns max), Cache Line Size: 64 bytes

    Interrupt: pin A routed to IRQ 18

    Region 0: Memory at e3000000 (32-bit, non-prefetchable) [size=64K]

    Capabilities: <access denied>

    Kernel driver in use: ath5k

    Kernel modules: ath5k

What other information could help finding the root issue? What logs should I check?

Edit:

The network is working fine now. Not sure what did the trick, if some fiddling with the router or upgrading network-manager