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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 12 Jul 2020
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      Current verdict on Linux on the 2015 Retina iMac 27": - Everything is tiny - amdgpu does not work but radeon does - BT needs a USB reset to work - No audio yet - TB2 works - Desktop is smooth - Even radeon is way better than the Ivy Bridge Intel crap I've been living with for 8y

      5 replies 2 retweets 51 likes
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    2. Hector Martin‏ @marcan42 12 Jul 2020
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      Seriously, it feels like a new computer just because the GPU and, more importantly, the drivers aren't garbage. This is the first time I've had tearing-free (composited!) video on my main workstation in half a decade. Intel used to be good but they really dropped the ball.

      3 replies 1 retweet 20 likes
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    3. Hector Martin‏ @marcan42 12 Jul 2020
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      I'm not moved over yet, this is a test booting my existing OS off of USB, but this will likely become my primary workstation in the coming weeks, after I get around to upgrading its internal storage and CPU.

      2 replies 0 retweets 16 likes
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    4. Hector Martin‏ @marcan42 12 Jul 2020
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      I just realized 5K isn't actually showing up as an option for display output, but just 4K max?

      1 reply 0 retweets 9 likes
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    5. Pablo‏ @PablockMS 12 Jul 2020
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      Replying to @marcan42

      Apple used a pre-release displayport standard and display controller. It has no support outside MacOS. The thing will be stuck at 4K unless you figure it out ;)

      1 reply 0 retweets 10 likes
    6. Pablo‏ @PablockMS 12 Jul 2020
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      Replying to @PablockMS @marcan42

      Note that not even Apple's custom AMD drivers for windows enable 5K output.

      1 reply 0 retweets 3 likes
      Hector Martin‏ @marcan42 12 Jul 2020
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      Replying to @PablockMS

      Supposedly the Boot Camp drivers added 5K support at some point. Sounds like some reverse engineering is in order. I can live with 4K mode until I get around to that though.

      5:59 AM - 12 Jul 2020
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      1 reply 0 retweets 10 likes
        1. New conversation
        1. Hector Martin‏ @marcan42 12 Jul 2020
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          Replying to @marcan42 @PablockMS

          Just a cursory look: we know the display has 8 lanes, I'm sure Apple didn't get AMD to customize any silicon for this, and the Windows driver has these strings. I think it's just two tiles over two normal DP links with the driver making it look like one.pic.twitter.com/X4hEllHEV0

          1 reply 0 retweets 16 likes
        2. Jernej Simončič‏ @jernej__s 12 Jul 2020
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          Replying to @marcan42 @PablockMS

          So two DP 1.2 links for 5k@60Hz?

          0 replies 0 retweets 1 like
          3. End of conversation

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