There is a hardware bug on some adapters, such as Atheros 5007EG on Acer Aspire One netbook. Connection may drop suddenly or work instable, dmesg shows: ath5k: unsupported jumbo. The reason is a result of poor hardware ASPM support. It is a hardware bug that is worked around in windows driver by disabling PCIE ASPM L0S.
There's a solution - turn ASPM L0S off manually for this device. 1. Download enable-aspm http://kernel.org/pub/linux/kernel/people/mcgrof/aspm/enable-aspm 2. Get your root complex: $ lspci -tv 0000:00 ... +-1c.2-[0000:03]----00.0 Atheros Communications Inc. AR5001 Wireless Network Adapter ... So root complex is 00:1c.2 3. Get your endpoint: $ lspci ... 03:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01) ... The endpoint is 03:00.0 4. Now you need to edit your enable-aspm # You just need to modify these three values: ROOT_COMPLEX="00:1c.2" ENDPOINT="03:00.0" ASPM_SETTING=2 5. Now executing: vo-one <at> acerone:~$ sudo bash enable-aspm [sudo] password for vo-one: Root complex: 00:1c.2 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 3 (rev 02) 0x50 : 0x43 --> 0x42 ... [SUCCESS]] L1 only Endpoint: 03:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01) 0x70 : 0x4B --> 0x4A ... [SUCCESS]] L1 only 6. Making the script executed at system startup: sudo chmod +x enable-aspm sudo cp enable-aspm /usr/bin Then add a line "enable-aspm" into your /etc/rc.conf before the line "exit 0;" to make the script executed at the system startup. -- ath5k : disconnection / slow network - "unsupported jumbo" error https://bugs.launchpad.net/bugs/369005 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
