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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. whitequark‏ @whitequark 12 Jul 2020
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      anyone i know used IPoTB? i've tested it yesterday. pros: absolutely zero fuss. cons: i get only 10.3 Gbps for some reason, instead of... 2 to 4 times as much?

      7 replies 1 retweet 22 likes
      Show this thread
    2. whitequark‏ @whitequark 12 Jul 2020
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      whitequark Retweeted David Guaraglia

      so i knew that, but i didn't realize that there are -two- kinds of passive cables, 1m/20Gbps and 0.5m/40Gbps; i have the former, going to grab the latter and see if things improvehttps://twitter.com/dguaraglia/status/1282481281180135424 …

      whitequark added,

      David Guaraglia @dguaraglia
      Replying to @whitequark
      As far as I can remember, you need very high quality cables and the signal degrades incredibly fast. This lists 2m as the longest for 40Gbps: https://blog.startech.com/post/thunderbolt-3-the-basics/ …
      1 reply 1 retweet 17 likes
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    3. whitequark‏ @whitequark 12 Jul 2020
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      also who the fuck at intel thought it is a good idea to have two kinds of cables that have exactly the same markings, cannot be introspected through software in any way, but differ in performance by 2x

      5 replies 3 retweets 52 likes
      Show this thread
    4. InnovativeMethods‏ @freeone3000 12 Jul 2020
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      Replying to @whitequark

      cables were designed by the usb-c guys

      1 reply 0 retweets 0 likes
    5. Turing Radius‏ @TuringRadius 12 Jul 2020
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      Replying to @freeone3000 @whitequark

      Ah the same people who made it possible for charging to be better if usb-c cable is plugged in "correctly" instead of "upside down", which both "work" but you won't get same performance (with some cables). -.-

      2 replies 0 retweets 2 likes
    6. Hector Martin‏ @marcan42 12 Jul 2020
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      Replying to @TuringRadius @freeone3000 @whitequark

      Wait, is this actually a thing by design? I've noticed this behavior but I always attributed it to flaky connectors.

      2 replies 0 retweets 0 likes
    7. Nicolas Tsagarides‏ @NicEXE 13 Jul 2020
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      Replying to @marcan42 @TuringRadius and

      https://eu.mouser.com/applications/usb-type-c-adds-hdmi/ … From what I understand, orientation plays very little role and if one way works better than the other its probably because of pin CC1 or CC2 being unreliable on that specific cable

      1 reply 0 retweets 0 likes
    8. Turing Radius‏ @TuringRadius 13 Jul 2020
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      Replying to @NicEXE @marcan42 and

      This isn't specific to the HDMI application, this is an issue with the physical header spec of USB-C and how it behaves w/ the original power delivery spec which was based on 2.0 not 3.x, so CCx are ignored.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 13 Jul 2020
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      Replying to @TuringRadius @NicEXE and

      I've noticed this with C-C cables connected to a normal 3A type C charger.

      12:23 AM - 13 Jul 2020
      0 replies 0 retweets 0 likes

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