** Tags added: verification-done-trusty -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ifupdown in Ubuntu. https://bugs.launchpad.net/bugs/1545302
Title: wpa-roam broken by fix for ifupdown #1337873 Status in ifupdown package in Ubuntu: Fix Released Status in ifupdown source package in Trusty: Fix Committed Status in ifupdown source package in Wily: Fix Committed Bug description: [Impact] * In some configurations recurrent ifup/down calls are broken due to a false-positive recursion detection. * In certain situations it leaves interfaces unconfigured (in this case: WLAN interface connected to WiFi network, but dhcp fails). [Test Case] * Setup wpa-roam configuration based on what is in comment #6 * Wait until wpa_supplicant connects to a wifi network * Run ifconfig to check if the WLAN interface received dhcp info * Expected result: WLAN is fully configured according to dhcp settings * Actual result: WLAN is connected to WiFi but not configured [Regression Potential] * Fixed upstream, fix present in Xenial. * Debdiffs contain a backport of an upstream fix. [Other Info] * Original bug description: The following versions of ifupdown introduced a recursion check using "IFUPDOWN_<interface>" environment variables along with a new locking mechanism for ifup (see #1337873): 0.7.47.2ubuntu4.2 (in Trusty) 0.7.54ubuntu1.1 (in Wily) 0.7.54ubuntu2 (in Xenial) This recursion check breaks the wpa-roam feature of wpasupplicant, preventing it from loading the logical interface specified by id_str after associating with an AP. Specifically, after upgrading to one of the above ifupdown versions, the '/sbin/ifup -v --force "$WPA_IFACE=$WPA_LOGICAL_IFACE"' command run by wpa_action in functions.sh fails with an "ifup: recursion detected for parent interface wlan0 in post-up phase" error. To fix the issue, functions.sh needs to run `unset "IFDOWN_$WPA_IFACE"` before calling /sbin/ifup to prevent ifup from detecting the recursion. The attached patch implements this change. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1545302/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
