[camera/display] glitching on skylake hardware

Just curious, does cheese works fine with video recording?

Surprisingly, cheese recording works fine.

On Tue, Jul 14, 2015 at 5:00 PM Po-Hsu Lin <email address hidden> wrote:

> Just curious, does cheese works fine with video recording?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1474199
>
> Title:
> [camera/display] glitching on skylake hardware
>
> Status in Checkbox Provider for PlainBox:
> Confirmed
>
> Bug description:
> Webcam output via "camera_test display" shows glitches when object in
> motion, detail situation can be found in video clip attached later.
>
> It's being sighted on trusty preload image with vivid kernel, but I
> can also reproduced on vivid stock image.
>
> And it does not found in following apps:
> camera-app
> cheese
> webrtc
>
>
> Steps to reproduce:
> 1. Boot stock Vivid on skylake hardware
> 2. Open Terminal and run
> $/usr/lib/2013.com.canonical.certification:checkbox/bin/camera_test display
>
> Expected:
> Output normally
>
> Actually:
> Glitching
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/plainbox-provider-checkbox/+bug/1474199/+subscriptions
>

This looks like the camera is recording interlaced image.

On Tue, Jul 14, 2015 at 10:51 AM, Po-Hsu Lin <email address hidden> wrote:
> Just curious, does cheese works fine with video recording?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1474199
>
> Title:
> [camera/display] glitching on skylake hardware
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/plainbox-provider-checkbox/+bug/1474199/+subscriptions

@Yung,

Could you please test this experimental version of the camera_test script?
I'm now using libcheese trough GObject introspection to remove all the video recording Gst tweaks that we had in the script.
Internally it calls the gstreamer camerabin so it should in theory work.
I'm now rendering the display and still pictures in a clutter window. Benefit we can close them immediately without waiting the 10s delay.

You'll also need to install two need dependencies:

sudo apt-get install gir1.2-cheese-3.0 gir1.2-clutter-1.0

@sylvain-pineau, thanks for the hint,

after fulfilling the missing package libwayland-egl1-mesa(-lts-vivid)
and $ rm ~/.cache/gstreamer-1.0/

the script in comment #6 works fine and the video output is clear with glitches,
And I could still reproduce it with old script.