I have not been able to track down which package contains the bug, but it appears to be a very low-level problem, possibly in the kernel or somewhere in Ubuntu's networking stack. I did not have this problem on Mint 12 which I had installed immediately prior to Ubuntu 12.04.
I will run apport after I've rebooted back into Ubuntu 12.04's stock kernel. I'm using the mainline one at the moment and apport does not seem to like it: Linux localhost 3.4.0-030400rc6-generic #201205061835 SMP Sun May 6 22:36:08 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ** Tags added: apport-collected precise ** Description changed: Ubuntu 12.04 on an Acer Aspire 1810t with an Intel 5100 AGN wifi card (that performed flawlessly on Ubuntu 10.04) appears to have a bug somewhere in the wireless network stack. Wireless works as expected at first, and connections can be configured with Network Manager without any problem, including a WPA2-Personal home network, but after some time (usually a number of hours, almost always after a suspend-to-ram or hibernate) the wireless connection drops and is unable to reconnect. After reboot, the wireless works at first, then the process repeats itself. Diagnostics: ** $ uname -a ** Linux ubuntubox 3.4.0-030400rc5-generic #201205011817 SMP Tue May 1 22:18:19 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux (note: the problem is the same when running the stock 3.2.0 kernel) ** $ dmesg ** (at the time the connection drops) [54671.300096] wlan0: authenticate with 00:24:7b:6d:32:62 (try 1) [54671.301874] wlan0: authenticated [54671.304312] wlan0: associate with 00:24:7b:6d:32:62 (try 1) [54671.308760] wlan0: RX ReassocResp from 00:24:7b:6d:32:62 (capab=0x411 status=0 aid=3) [54671.308766] wlan0: associated [54681.808039] wlan0: no IPv6 routers present [54692.009142] wlan0: deauthenticating from 00:24:7b:6d:32:62 by local choice (reason=3) ** $ sudo lshw -C network ** *-network description: Wireless interface product: WiFi Link 5100 vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 00 serial: <snip> width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.4.0-030400rc5-generic firmware=8.83.5.1 build 33692 ip=192.168.0.102 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg resources: irq:44 memory:d2500000-d2501fff ** $ sudo lspci -v ** 02:00.0 Network controller: Intel Corporation WiFi Link 5100 Subsystem: Intel Corporation WiFi Link 5100 AGN Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at d2500000 (64-bit, non-prefetchable) [size=8K] Capabilities: [c8] Power Management version 3 Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [e0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [140] Device Serial Number <snip> Kernel driver in use: iwlwifi Kernel modules: iwlwifi ** $ cat /etc/network/interfaces ** auto lo iface lo inet loopback ** $ sudo rfkill list all ** 2: phy0: Wireless LAN Soft blocked: no Hard blocked: no 7: acer-wireless: Wireless LAN Soft blocked: no Hard blocked: no 8: acer-bluetooth: Bluetooth Soft blocked: yes Hard blocked: no What I've Tried so far ----- * cannot connect to Open APs or WPA2 APs - when the wifi stops working, I cannot connect to any access points, even Open ones. * once the network problems start, plugging in a USB WiFi adapter w/ Atheros chipset results in the same problem with both cards. This USB device is known to work with Ubuntu "out of the box", suggesting it is not an iwlwifi driver problem. * disabling "N" mode in iwlifi does not work: "options iwlwifi 11n_disable=1" in /etc/modprobe.d/disable11n.conf * no option to use ndiswrapper for this wifi card (which is probably a good thing!) * unloading iwlwifi before suspend does not work: adding 'SUSPEND_MODULES="$SUSPEND_MODULES iwlwifi"' in /etc/pm/config.d/unload_modules * switching to kernel 2.6.39 (with iwlagn driver), 3.3.0, 3.4.0rc5 does not work * removing the acer_wmi module (sudo rmmod acer_wmi) does not work, and disables bluetooth * "sudo /etc/init.d/networking restart" does not work * "sudo stop network-manager && sudo start network-manager" does not work * "sudo rmmod iwlwifi && sudo modprobe iwlwifi" does not work * deleting the connection in Network Manager and recreating it from scratch does not work * leaving the laptop on without suspending, hibernating or rebooting results in the wireless eventually disconnecting and being unable to reconnect. + --- + ApportVersion: 2.0.1-0ubuntu7 + Architecture: amd64 + DistroRelease: Ubuntu 12.04 + InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) + Package: linux (not installed) + ProcEnviron: + TERM=xterm + PATH=(custom, no user) + LANG=en_US.UTF-8 + SHELL=/bin/bash + SourcePackage: linux-meta + Tags: precise precise + Uname: Linux 3.4.0-030400rc6-generic x86_64 + UnreportableReason: The running kernel is not an Ubuntu kernel + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lpadmin netdev plugdev sambashare sudo -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/996205 Title: Wireless stops working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/996205/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
