I just tried this again with the latest PPA. The behavior is still weird. Initially, I'm in flight mode and the status is correct, and the GET request fails immediately, as expected. Then I turn flight mode off and wait until the wifi connection is up, then request a few more thumbnails. At that point, the accessibility status is still "network down" for several GET requests in a row.
I'm also seeing a bunch of these in the log: thumbnailer-service: [00:18:43.520] QNAM: -1 thumbnailer-service: [00:18:43.520] sending request thumbnailer-service: [00:18:43.521] Warning: QObject::connect: Cannot connect (null)::stateChanged(QNetworkSession::State) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged(QNetworkSession::State) (The "QNAM" is the trace for the accessibility status.) After a bunch more of these, in the end, I see this: thumbnailer-service: [00:18:43.520] QNAM: -1 thumbnailer-service: [00:18:43.520] sending request thumbnailer-service: [00:18:43.521] Warning: QObject::connect: Cannot connect (null)::stateChanged(QNetworkSession::State) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged(QNetworkSession::State) thumbnailer-service: [00:18:46.822] QNAM: -1 thumbnailer-service: [00:18:46.829] sending request thumbnailer-service: [00:18:46.831] Warning: QObject::connect: Cannot connect (null)::stateChanged(QNetworkSession::State) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged(QNetworkSession::State) thumbnailer-service: [00:18:46.910] "artist: Pink Floyd/ (512,512): 3.454583 [d: 3.365325] sec (MISS)" thumbnailer-service: [00:18:46.914] QNAM: -1 thumbnailer-service: [00:18:46.915] sending request thumbnailer-service: [00:18:46.916] Warning: QObject::connect: Cannot connect (null)::stateChanged(QNetworkSession::State) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged(QNetworkSession::State) thumbnailer-service: [00:18:46.942] "artist: Pink Floyd/The Dark Side Of The Moon [2011 - Remaster] (512,512): 3.423468 [d: 3.393726] sec (MISS)" thumbnailer-service: [00:18:48.096] QNAM: -1 thumbnailer-service: [00:18:48.100] sending request thumbnailer-service: [00:18:48.109] Warning: QObject::connect: Cannot connect (null)::stateChanged(QNetworkSession::State) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged(QNetworkSession::State) thumbnailer-service: [00:18:48.190] "artist: Passport/Passport to Paradise (512,512): 4.671097 [q: 3.298519, d: 1.273558] sec (MISS)" thumbnailer-service: [00:18:48.368] QNAM: -1 thumbnailer-service: [00:18:48.369] sending request thumbnailer-service: [00:18:48.371] Warning: QObject::connect: Cannot connect (null)::stateChanged(QNetworkSession::State) to QNetworkReplyHttpImpl::_q_networkSessionStateChanged(QNetworkSession::State) thumbnailer-service: [00:18:48.409] "artist: Mamady Keïta/ (512,512): 4.876946 [q: 3.379785, d: 1.454331] sec (MISS)" Note that the accessibility status each time is still -1 even though, eventually, a the requests succeed. So, something is definitely not right here still. Now I kill off the music app and wait for the thumbnailer-service to exit, all while the wifi connection is up. I then try again and see this: thumbnailer-service: [00:27:35.858] QNAM: 1 thumbnailer-service: [00:27:35.864] sending request thumbnailer-service: [00:27:35.873] QNAM: 1 thumbnailer-service: [00:27:35.879] sending request thumbnailer-service: [00:27:35.927] "artist: Pink Floyd/The Dark Side Of The Moon [2011 - Remaster] (512,512): 10.127397 [d: 10.049212] sec (NETWORK DOWN)" thumbnailer-service: [00:27:35.934] "artist: Passport/Passport to Paradise (512,512): 10.066997 [d: 10.004309] sec (NETWORK DOWN)" thumbnailer-service: [00:27:37.638] QNAM: 1 thumbnailer-service: [00:27:37.641] sending request thumbnailer-service: [00:27:37.719] "artist: Mamady Keïta/Afö (512,512): 11.852127 [q: 9.987196, d: 1.779486] sec (MISS)" thumbnailer-service: [00:27:39.491] QNAM: 1 thumbnailer-service: [00:27:39.496] sending request thumbnailer-service: [00:27:39.645] "album: Passport/Passport to Paradise (512,512): 13.765835 [q: 9.992015, d: 3.618609] sec (MISS)" thumbnailer-service: [00:27:39.892] "album: Mamady Keïta/Afö (512,512): 13.944809 [q: 11.688131, d: 2.144388] sec (MISS)" thumbnailer-service: [00:27:40.845] "album: Pink Floyd/The Dark Side Of The Moon [2011 - Remaster] (512,512): 14.866033 [q: 13.510416, d: 1.215110] sec (MISS)" Now the accessibility status is 1, as it should be. But we get two more failing requests (the first two entries in the trace). The NETWORK DOWN status means that we waited for 10 seconds before giving up. But then we end up with three successful requests in the end. These were previously queued and held in the queue (by us) because we limit ourselves to two concurrent downloads. So, this doesn't look right to me. It's as if there is some retry logic going on behind the scenes, and the accessibility status appears to still be wrong at least some of the time. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qtbase-opensource-src in Ubuntu. https://bugs.launchpad.net/bugs/1470700 Title: QNetworkAccessManager hangs when in flight mode Status in qtbase-opensource-src package in Ubuntu: Confirmed Status in thumbnailer package in Ubuntu: Triaged Bug description: Testing the fix: - Update rc-proposed (vivid) to citrain device-upgrade 32 0000 - Reboot --- When my phone is in flight mode, HTTP requests made using QNetworkAccessManager seem to hang rather than erroring out immediately. From my tests, it looks like the HTTP request is blocked until the flight mode is disabled and a network connection is reestablished. This is contrary to the documentation, which states: """If the network is not accessible the network access manager will not process any new network requests, all such requests will fail with an error. Requests with URLs with the file:// scheme will still be processed.""" http://doc.qt.io/qt-5/qnetworkaccessmanager.html#networkAccessible- prop By running strace on my test program, it doesn't even look like it attempts to open a TCP connection when blocked in flight mode. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1470700/+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