[mako] progressive shearing

[Selene ToyKeeper]

On my mako device, in both the mwc image and r203, I've seen the camera get out of alignment with itself, shearing gradually more and more sideways (portrait mode sideways), with noise lines sometimes appearing, then looping around. This shows up both in the image preview and in the picture produced after pressing the shutter button.

I'm not sure how to reproduce the issue, but I've seen it a total of three times out of about a hundred invocations of the camera app, and someone else in QA saw it during our daily standup. I've attached a video showing what it looks like.

In general, it seems like this either happens within ~10 seconds or so of starting the app, or it won't happen during that session. I think it may help to shake the phone and/or touch the image to focus, to trigger the issue, but I have not been able to trigger it on purpose yet.

So... not much genuinely useful information yet. But if it continues to happen, hopefully we can gather more details here.

[Selene ToyKeeper (toykeeper)]

I got another instance of this today, with image 237. So, apparently not fixed. Still little or no idea how to actually trigger it, but at the time, I was tilting the camera back and forth and repeatedly trying to get it to focus while it adjusted its exposure from a dark room to a bright screen. Screenshot attached.

[taiebot65 (dedreuil)]

I confirm.
Just using the focus button few times will trigger the bug.

[Selene ToyKeeper (toykeeper)]

Still happens in image 263. Also, it seems to have partially displaced colors in a photo taken while this bug is happening.

After taking this picture, the app recovered and fixed the display. So, it seems to now be limited to only one photo per bug instance, at least.

To trigger this, the easiest way seems to be: Start the camera app, shaking the phone and tapping the screen rapidly as it starts. Wait a few seconds. If the bug doesn't happen, kill the camera app and start over.

[Bill Filler (bfiller)]

only since android 4.4 move

[Selene ToyKeeper (toykeeper)]

For what it's worth, I haven't seen this happen in about a month. I can't confirm 100% that it's fixed, since it's intermittent and infrequent, but it has been longer than usual since I saw it happen.

[Selene ToyKeeper (toykeeper)]

Nevermind. After about 20 tries, I reproduced this on image utopic 41.

[Adnane Belmadiaf (daker)]

Still happening in Utopic image 140

[Florian Boucault (fboucault)]

Still happening in image 157

[Ricardo Salveti (rsalveti)]

Assigning it to tvoss as he created the hybris abstraction for camera.

[Thomas Voß (thomas-voss)]

Did we investigate into qtubuntu-camera and ruled out that our glue to Qt isn't causing this issue?