Thanks for the detailed bug report. That jagged black tearing is the
result of unsynchronized nonlinear buffers being used on screen.
Can you please try these in order?
1. Run 'lscpu' and send us the output.
2. Run: sudo apt install vainfo
3. Run 'vainfo' and send us the output.
4. Try this as a workaround:
sudo apt remove gstreamer1.0-vaapi
** Tags added: bionic visual-quality
** Changed in: totem (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1811808
Title:
Tearing and/or flickering when using Intel graphics
Status in totem package in Ubuntu:
Incomplete
Bug description:
When using Intel graphics on my hybrid Nvidia laptop, videos in Totem
have awful tearing/flickering which makes them essentially
unwatchable.
With default X settings, I get tearing across the top of the screen
(but I also get very noticeable tearing in other applications); if I
enable TearFree (which eliminates tearing in Chrome), the tearing
turns into jagged black flickers which extend from the top of the
screen right down to near the bottom of the screen on some frames.
The flickers are visible in screenshots, so I have attached one.
Ubuntu version: Ubuntu 18.04.1
Totem version: 3.26.0-0ubuntu6.1
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