I (with tvoss' help) created some tools to recreate the scenario in a more controlled setup (e.g. no Qt). I have tested the trusted prompt feature at the mir level, as well as the unity8 level, with Camera app and with other apps. I haven't been able to repro the issue after thousands of iterations.
It involves running the camera unconfined like so : phablet@ubuntu-phablet:/usr/share/click/preinstalled/com.ubuntu.camera/current$ ./camera-app --desktop_file_hint=dialer-app and then running the following in a script doing thousands of iterations : mir_demo_client_prompt_helper_provider.bin -p <camera-pid> -m /run/user/32011/mir_socket_trusted -- --desktop_file_hint=dialer-app mir_demo_client_prompt_helper_provider.bin sets up a trust session and forks a gl app (simulating the dialog box) that renders 20 frames and exits (so it could be run automatically. This setup didn't yield any panic or crash. One thing I haven't tried is using trivial code (no Qt) as the actual TPP - this way the timing that TPP cutting in right before Camera starts to render can be recreated. Whereas the above case requires the Camera app to have been launched and rendering already. This involves modifying the lp:trust-store code that I'm not familiar with, but with some help, am willing to give it a try. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1551811 Title: Opening the camera for the first time leads to reboot Status in camera-app: New Status in Canonical System Image: Confirmed Status in Mir: New Status in Telegram app: Invalid Status in trust-store: New Status in mir package in Ubuntu: New Bug description: Test case. - Flash the phone. - Open Telegram app. - Fill the account details. - Add a contact (if needed). - Select a contact to send a message. - Tap on the clip to attach a photo. - Select the camera. Expected result. - After accepting the permission dialog, camera app allows to take a picture. Actual result. - After accepting the permission dialog, phone reboots. I'm not sure whether this is a problem with Telegram or with the camera. However, I couldn't reproduce the problem using the messaging- app. And once the permission dialog is accepted, the reboot is gone. com.ubuntu.telegram_2.0.8.0_armhf.click current build number: 259 device name: arale channel: ubuntu-touch/rc-proposed/meizu.en -------------------------- Same happens with the following steps: 1. Flash device (arale) with $ ubuntu-device-flash touch --device arale --channel ubuntu/rc- proposed/meizu.en --recovery-image <path-to-recovery-with-adb-support> --bootstrap 2. Wait until flash process is done 3. Go through first-start wizard 4. Pass tutorial 5. Directly launch camera-app, approve trust-prompt Repeat 1-5 multiple times and you will see a frozen device after step 5. You can verify it happened due to a kernel panic mentioned in comment #7. You can reset the trust db entry for the camera app using : $rm -rf ~/.local/share/CameraService $restart cameraservice-trust-stored Run the following to get the command line for all threads so you can match the pid from the kmsg later (see below): ps H -eo 'pid tid cmd:250 comm' To verify it was really the kernel panic run $ sudo cat /proc/last_kmsg once the device has rebooted. To manage notifications about this bug go to: https://bugs.launchpad.net/camera-app/+bug/1551811/+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
