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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 14 Jul 2020
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      The MacroSilicon MS2109 HDMI capture stereo audio fix has been merged into the Linux 5.8 tree and the stable trees (4.4/4.9/4.14/4.19/5.4/5.7), so hopefully it should be making it to your distro soon. L/R are still swapped, you can use JACK or the ALSA route plugin to fix that.

      2 replies 3 retweets 34 likes
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    2. Hector Martin‏ @marcan42 14 Jul 2020
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      Patch links: https://lore.kernel.org/alsa-devel/20200702071433.237843-1-marcan@marcan.st/ …https://github.com/torvalds/linux/commit/e337bf19f6af38d5c3fa6d06cd594e0f890ca1ac …

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    3. gameblabla‏ @gameblabla 15 Jul 2020
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      Replying to @marcan42

      This fixes the issue with mono sound on my MacroSilicon MS2109 usb card but it breaks video output. Reverting this patch fixes video output. Are you aware of this ? Mine looks like thispic.twitter.com/CFee5nwhuE

      1 reply 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 15 Jul 2020
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      Replying to @gameblabla

      Uhh I thought I saw this on my computer once but couldn't repro. Does the device disappear entirely? If so I think it has to do with USB interface claiming...

      1 reply 0 retweets 0 likes
    5. gameblabla‏ @gameblabla 15 Jul 2020
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      Replying to @marcan42

      Yup, it was entirely gone. It was just detected as a USB audio device. I couldn't select it in OBS and v4l2-ctl was not detecting it. Oddly enough this adapter would bring up two interfaces but only one would work (/dev/video0 is the one working, /dev/video1 doesn't work)

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    6. gameblabla‏ @gameblabla 15 Jul 2020
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      Replying to @gameblabla @marcan42

      (Of course this is without your patch. With your patch, there's no USB Vid or anything)pic.twitter.com/jnXn58Ux7Z

      1 reply 0 retweets 0 likes
    7. Hector Martin‏ @marcan42 15 Jul 2020
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      Replying to @gameblabla

      The two interfaces is normal, one is for metadata or something. All USB UVC devices do that. I was very confused when Linux started doing that.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 16 Jul 2020
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      Replying to @marcan42 @gameblabla

      Re the no video, try unloading uvcvideo and snd-usb-audio, and reloading uvcvideo first. Dammit I'll have to figure out how to make it not do that.

      12:01 AM - 16 Jul 2020
      3 replies 0 retweets 0 likes
        1. gameblabla‏ @gameblabla 16 Jul 2020
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          Replying to @marcan42

          I would have to recompile the kernel and try it again but dang that would sound annoying to do DD: Good luck fixing it

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        1. gameblabla‏ @gameblabla 16 Jul 2020
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          Replying to @marcan42

          Btw, your workaround works. Guess i'll use a script for now. Of course a proper fix would be nice as well. Thanks !

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 16 Jul 2020
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          Replying to @gameblabla

          This explains why I couldn't repro in a cursory test. Okay, I'll have to see if I can sneak the fix in...

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          3. End of conversation
        1. Toad King‏ @TheToadKing 1 Aug 2020
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          Replying to @marcan42 @gameblabla

          just ran into this myself and unloading both modules and loading uvcvideo first fixed it for me as well, running 5.7.11 on arch

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