Public bug reported:
My PC is an Intel Core I3 and I use the built-in HD 4600 graphics. My
display is 1680x1050, connected via DVI-D, Ubuntu version is 15.10
64-bit.
I do a fresh Ubuntu install and install and run glmark2. The horse spins
smoothly.
I set "System settings -> Displays -> Rotation" to "Counterclockwise",
rotate my display and run glmark2 again. The horse totally stutters.
When the rotation is "Counterclockwise" other OpenGL applications will
even freeze.
** Affects: mesa (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1540194
Title:
OpenGL stutter and freeze when rotation = Counterclockwise
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