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What Not To Expect From The Linux 2.6.40 Kernel

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  • #11
    Originally posted by michal View Post
    "The Reiser4 file-system still has not been proposed for integration into the mainline Linux kernel tree"

    Who gives a flying ship about reiser4?
    i am. do you mind ?

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    • #12
      With the open-source Radeon kernel driver, there still is not the bits in place yet for implementing Hyper-Z and Radeon HD 5000/6000 series HDMI audio support...
      Damn. I recall when R700 HDMI audio support was added towards the end of 2009, and when HDMI audio support under KMS was added in 2010. I just assumed that this would carry over to R800 (HD5000), but apparently not.

      I recently got a couple of HD5450's and although they are not being used in HTPC's, I was looking forward to connecting them to my TV via HDMI occasionally.

      Is anyone working on this? I can't program, but I might be able to help with testing.

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      • #13
        HDMI audio broken in 2.6.40?

        It looks like HDMI audio may be more generally broken in 2.6.40 - see here in FedoraForums http://www.fedoraforum.org/forum/sho...d.php?t=267793 I had pretty much the identical experience to the OP here, specifically:-
        • No HDMI audio, even though no error messages and PA volume control shows active sound levels in bars. Other sound output devices OK.
        • Flash video jerky and 2-3 times speeded up. This is with Adobe proprietary x86_64 beta Flash plugin
        • All MythTV video - file, DVD or live TV (DVB-T) - fast & jerky, same as with Flash plugin. However same video content (file or DVD) plays OK in other applications (Kaffeine, Dragon)...apart from no HDMI audio
        I am on x86_64. Graphics card is HD 4670 (RV730) with X.Org radeon driver and KMS. However the HDMI audio problem appears to be independent of graphics hardware / driver, and distribution. It is conceivable that the HDMI audio and video playback issues are independant, and just came up together. If I boot into 2.6.38.8-35 everything goes back to normal.

        There are some reports that the HDMI audio at least is fixed in the very latest kernel versions; however it looks like quite a significant regression.

        Andrew

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        • #14
          Originally posted by AndyW View Post
          It looks like HDMI audio may be more generally broken in 2.6.40 - see here in FedoraForums http://www.fedoraforum.org/forum/sho...d.php?t=267793 I had pretty much the identical experience to the OP here, specifically:-
          • No HDMI audio, even though no error messages and PA volume control shows active sound levels in bars. Other sound output devices OK.
          • Flash video jerky and 2-3 times speeded up. This is with Adobe proprietary x86_64 beta Flash plugin
          • All MythTV video - file, DVD or live TV (DVB-T) - fast & jerky, same as with Flash plugin. However same video content (file or DVD) plays OK in other applications (Kaffeine, Dragon)...apart from no HDMI audio
          I am on x86_64. Graphics card is HD 4670 (RV730) with X.Org radeon driver and KMS. However the HDMI audio problem appears to be independent of graphics hardware / driver, and distribution. It is conceivable that the HDMI audio and video playback issues are independant, and just came up together. If I boot into 2.6.38.8-35 everything goes back to normal.

          There are some reports that the HDMI audio at least is fixed in the very latest kernel versions; however it looks like quite a significant regression.
          Alex disabled audio by default in radeon. Lovely, isn't it?

          Add "radeon.audio=1" to GRUB.

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          • #15
            Originally posted by dfx. View Post
            i am. do you mind ?
            Why not? It's a killer filesystem. (an oldie but a goodie)

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            • #16
              Originally posted by Zajec View Post
              Alex disabled audio by default in radeon. Lovely, isn't it?
              Why did he do that?

              Add "radeon.audio=1" to GRUB.

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              • #17
                The current hdmi code causes blank screens on a lot of systems if audio is enabled. Until that gets fixed properly, I thought it better to disable it.

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                • #18
                  Originally posted by agd5f View Post
                  The current hdmi code causes blank screens on a lot of systems if audio is enabled. Until that gets fixed properly, I thought it better to disable it.
                  Hard to say. You disabled audio which was working on (almost?) all R6xx/R7xx cards and you confused a lot of users by that. In pure math it could be easier for bug-affected users to disable audio with "radeon.audio=0". However, on the other hand, having modesetting working well is much more important than having feature like audio.

                  Can someone with account on fedoraforum.org explain Fedora users the issue? http://www.fedoraforum.org/forum/sho...=267793&page=2

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                  • #19
                    Yeah, it's a tough call. Unfortunately, it's dependant on the TV/monitor and how it interprets the hdmi packets. Blank screen is not something a lot of users can deal with, so I opted to go in favor of working display for now.

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                    • #20
                      Thanks for the suggestions and explanation. With this parameter HDMI audio is restored, and the other video playback issues are fixed as well - so they obviously share the same underlying cause. I have cross-posted over on FedoraForum as well.

                      Thanks,
                      Andrew

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