Re: 4k video playback on some videos makes entire system sluggish

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On Mon, 9 Oct 2023 21:12:29 -0400
Alex <mysqlstudent@xxxxxxxxx> wrote:

> HI,
> 
> 
> > Finally got a chance to reboot, and it definitely made a difference
> > with playing 4k videos.
> >
> > However, playing two 4k videos at the same time makes both of them
> > slow. 
> 
> Actually, playing any two videos together makes the whole system
> jerky.

I found this link about changes to the AMD driver in 6.5 kernel.

https://www.phoronix.com/review/linux65-ryzen-7950x

"One of the notable changes with this new kernel version is Linux now
defaulting to the AMD P-State "EPP" active driver configuration for
modern Ryzen systems rather than the long-used generic ACPI CPUFreq
driver default. "

I wonder if these changes, while good in most cases, might be causing
you problems.  Do you have a 6.4 kernel that you can boot and test
with?  If you do, and it works as you are expecting, then you could
open a bugzilla against the kernel to bring your problem to the
attention of the kernel developers.

Alternatively, perhaps there is some cruft left over after the update.
What happens if you create a new user, and then use that new user to
try to play two videos together?
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