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  • Originally posted by fuzz View Post
    I'm unable to replicate your issue. I tried a few different videos (especially some of those GoPro videos provide good audio-video synchronization content in 4k). I used Chrome, but I can try chromium too. In my experience firefox runs smoothly while chromium tears and stutters, even with Netflix.
    Thanks for the test.

    How about this: mplayer -vo gl video-h264.mkv

    Originally posted by fuzz View Post
    The kernel I'm running is agd5f's drm-next-4.8 branch.
    Is there an advantage to running agd5f kernel compared to 4.7-git on R9 390?

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    • Originally posted by fuzz View Post
      In my experience firefox runs smoothly while chromium tears and stutters, even with Netflix.
      I think that in the general stuttering will be solved when the market moves to >= 144Hz monitors. I currently have a 60Hz display, the next one I buy to replace it (don't know when) will run at more than 60Hz.

      I don't know why they chose 144Hz to be the next standard refresh frequency.

      Edit: 60*24 = 1440, so it makes sense to me now.
      Last edited by atomsymbol; 10 July 2016, 03:01 PM. Reason: Explain 144 Hz

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      • Originally posted by atomsymbol View Post

        Thanks for the test.

        How about this: mplayer -vo gl video-h264.mkv
        Installed mplayer just for you (I usually use mpv). Seems fine!


        Originally posted by atomsymbol View Post
        Is there an advantage to running agd5f kernel compared to 4.7-git on R9 390?
        Yep, see this quote:
        Originally posted by bridgman View Post
        The pull request also contains patches which pick up new SMC microcode (with a _k suffix) for some SI/CI boards, which may improve stability for 390/390X users.
        The performance in this kernel is much, much better than it was for me on 4.7. I wasn't able to do much beyond basic desktop usage. I also no longer have to set performance/high dpm manually to avoid the machine freezing up.

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        • Originally posted by atomsymbol View Post

          I think that in the general stuttering will be solved when the market moves to >= 144Hz monitors. I currently have a 60Hz display, the next one I buy to replace it (don't know when) will run at more than 60Hz.

          I don't know why they chose 144Hz to be the next standard refresh frequency.

          Edit: 60*24 = 1440, so it makes sense to me now.
          I agree. I decided to go with 4k over moar hertz for now, but when I can get a 4k monitor with 144 Hz for a reasonable price I will be happy.

          +1 to the multiple of 24 thing... the industry is weird

          Comment


          • Originally posted by fuzz View Post
            Installed mplayer just for you (I usually use mpv). Seems fine!
            It turned out that "vc=ffh264vdpau,ffmpeg12vdpau,ffwmv3vdpau,ffvc1vdp au,ffodivxvdpau," can only be combined with "vo=vdpau", otherwise it causes problems.

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            • Originally posted by fuzz View Post
              The performance in this kernel is much, much better than it was for me on 4.7. I wasn't able to do much beyond basic desktop usage.
              I just tried agd5f's drm-next-4.8 branch. I measured no performance advantage over normal linux-git (Shadow of Mordor, Tomb Raider, glxgears).

              Originally posted by fuzz View Post
              I also no longer have to set performance/high dpm manually to avoid the machine freezing up.
              I have the _k patch as well (in normal linux-git). It lowers power consumption and keeps fan noise down.

              I additionally have a non-public patch to lower the memory clock on R9 390. This reduces desktop power consumption by about 40 watts compared to running memory at the default highest clock. Automatic mclk adjustment has some issues unfortunately, so I am adjusting mclk manually for now.

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              • Originally posted by atomsymbol View Post

                I just tried agd5f's drm-next-4.8 branch. I measured no performance advantage over normal linux-git (Shadow of Mordor, Tomb Raider, glxgears).



                I have the _k patch as well (in normal linux-git). It lowers power consumption and keeps fan noise down.

                I additionally have a non-public patch to lower the memory clock on R9 390. This reduces desktop power consumption by about 40 watts compared to running memory at the default highest clock. Automatic mclk adjustment has some issues unfortunately, so I am adjusting mclk manually for now.
                Perhaps the _k patch alone solved a lot of problems for me.... I haven't tried it outside of the drm-next-4.8 branch. Everyone I've seen has claimed slightly different issues and kernel versions with the 390/390X.

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                • There may be multiple issues being discussed here:

                  - reported performance regression on 290 (and 390 ?) which (AFAIK) affects the open source drivers in the 4.7 kernel but which has not made it into the AMDGPU-PRO kernel driver.

                  - stability issues, supposedly on 390 only, which the _k microcode has been reported to help with

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                  • Originally posted by bridgman View Post
                    There may be multiple issues being discussed here:

                    - reported performance regression on 290 (and 390 ?) which (AFAIK) affects the open source drivers in the 4.7 kernel but which has not made it into the AMDGPU-PRO kernel driver.

                    - stability issues, supposedly on 390 only, which the _k microcode has been reported to help with
                    Yes, I think the performance regression hit most (all?) 290 owners and only some 390 owners (myself being unlucky).

                    Comment


                    • Originally posted by Passso View Post
                      So this will be 480 VS 1060. At last a real battle, the winner will get my money.

                      Fight!

                      https://www.youtube.com/watch?v=XKdJ6DnPhzk

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