[Bug 198511] New: lags in youtube videos 1080p 60fps with radeon hd4650 and kernel 4.15rc8

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=198511

            Bug ID: 198511
           Summary: lags in youtube videos 1080p 60fps with radeon hd4650
                    and kernel 4.15rc8
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.15rc8 mainline
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: mister.freeman at laposte.net
        Regression: No

Hello,

I have a radeon HD4650 pcie, I use the radeon driver,

I notice that with kernel 4.15.rc8 mainline some videos in 1080p at 60fps format
in youtube play with slight lags in fullscreen mode,

but If use kernel 4.14.13-1 then all is Ok, streaming videos in 1080p at 60fps
play without lags ( perfect 60 fps ),

so I suspect a bug in radeon driver provided by kernel 4.15.rc8,

my OS is archlinux 64 bits,

some example of video 1080 at 60 fps for youtube :
https://www.youtube.com/watch?v=CcUXxM_rbAM

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