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ATI & Arch - video pauses briefly every four or five seconds.

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Belarathon:
Hi there:

Despite the great strides you've made supporting ATI cards, I'm seeing a small glitch with a vanilla Arch install or any arch distro really, with KDE (and other desktops).  The video stops every few seconds for the briefest of moments, causing a perceptible jerking motion. Mine is a Sea Islands ATI apu, Kaveri R7.  I've tried with the base drivers, which are usually just the xf86, in addition to the entire suite of amdgpu drivers - replete with mesa, vulkan-radeon, libva-mesa-driver, and mesa-vdpau.  I've tried enabling/disabling HW accel in JRiver, toggling off compositing, etc.  It doesn't seem to make a difference.  I've tried all of the MC builds since MC started working with my graphics.

I'm just wondering if anyone has noticed similar  behavior under Arch, and is so, have you found a solution?  In so many words, I've installed practically every driver except proprietary pro, and I'm not clever enough for that.

Thanks

Belarathon:
Well, my bad.  This is debian too, among others.  I had to try.   Back to the Nvidia , TFN.

mwillems:
I have an AMD 5700XT on Arch and don't see the pausing problem with the open source graphics (mesa).  I don't have a sea islands card to test.

Belarathon:
Back on the AMD APU now, as the NVIDIA card really does make for a lagged desktop experience, and a new discovery -

It's really this simple:  Video is perfectly fine in a windowed pane...even in a full screen display view.   It's only when I switch to Theater Mode, that the video gets choppy.

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