To my suprise today installed a different DE, xfce and ubuntu and both videos played simultaneously just fine!!? Noticed intel_gpu_top shows up 20% usage just idling on cinammon but close to 0% on other DEs so I tested and killed cinnamon in task manager while the videos are playing and the stutter does stop!
Is cinammon causing this problem then!? too heavy? Using 20% of gpu idling cant be right, any thoughts?
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$ inxi -CG
CPU:
Info: quad core model: Intel Core i5-4570 bits: 64 type: MCP cache:
L2: 1024 KiB
Speed (MHz): avg: 3186 min/max: 800/3600 cores: 1: 3198 2: 3198 3: 3198
4: 3152
Graphics:
Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics
driver: i915 v: kernel
Display: x11 server: X.Org v: 1.21.1.3 driver: X: loaded: intel gpu: i915
resolution: 1: 1920x1080~60Hz 2: 1920x1080~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 4600 (HSW GT2)
v: 4.6 Mesa 22.0.5