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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 27 Feb 2019
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      Come on @arstechnica, you literally wrote an article about this in 2003! Check your archives!https://arstechnica.com/uncategorized/2003/10/2927-2/ …

      1 reply 0 retweets 8 likes
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    2. Hector Martin‏ @marcan42 27 Feb 2019
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      My mouse is very much a USB 2.0 *low-speed 1.5mbps* device. This is how it has always worked! That is not to say that USB-IF's approach isn't a confusing mess, especially with the speed names (LS/FS/HS/SS/SS+)... but it's been a *consistent* confusing mess from the very start.pic.twitter.com/NE9sBg9STQ

      3 replies 0 retweets 6 likes
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    3. Hector Martin‏ @marcan42 27 Feb 2019
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      @DrPizza, might want to amend the article? I mean you're right it's confusing, but it's not new or different from what USB-IF have been doing until now.

      3 replies 0 retweets 2 likes
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    4. Temuri‏ @mgrviper 27 Feb 2019
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      Replying to @marcan42 @DrPizza

      USB3 gets additional layer of confusion though - minor version incrementing that seems to mean nothing (?). Also gen1-2-2x2 is already more difficult than low/high/super-speed, as it is not clear what does it mean (and why it is not gen3)

      2 replies 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 27 Feb 2019
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      Replying to @mgrviper @DrPizza

      The minor version incrementing means new speeds get introduced. The "2x2" thing is a technical term; the actual marketing terms are "SuperSpeed USB", "SuperSpeed USB 10Gbps", "SuperSpeed USB 20Gbps" which seem reasonable enough.

      2 replies 0 retweets 2 likes
    6. Pumpkin Fright 👨‍⚕️ 🍕‏ @DrPizza 27 Feb 2019
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      Replying to @marcan42 @mgrviper

      Those terms aren't used on spec sheets and never have been. Nor are they meant to be.

      1 reply 0 retweets 0 likes
    7. Hector Martin‏ @marcan42 27 Feb 2019
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      Replying to @DrPizza @mgrviper

      Those are the marketing terms, taken from the very PDF you linked in your article, and also used in logos. That means they're intended for end-users, i.e. consumer product spec sheets.pic.twitter.com/eDb105Qutl

      1 reply 0 retweets 0 likes
    8. Pumpkin Fright 👨‍⚕️ 🍕‏ @DrPizza 27 Feb 2019
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      Replying to @marcan42 @mgrviper

      Please, get real. Look at any computer or motherboard spec sheet. They're not listed as SuperSpeed because they can operate at a range of speeds.

      1 reply 0 retweets 0 likes
    9. Hector Martin‏ @marcan42 27 Feb 2019
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      Replying to @DrPizza @mgrviper

      That's for *hosts*, which in fact must support all speeds for any given USB spec version they claim to support. *Devices* were never supposed to put the USB version front and center. What people care about is the transfer rate they use.

      2 replies 0 retweets 1 like
    10. Hector Martin‏ @marcan42 27 Feb 2019
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      Replying to @marcan42 @DrPizza @mgrviper

      This is what a device controller spec sheet looks like: https://www.nxp.com/products/product-information/ip-block-licensing/usb-2.0-full-high-speed-solution:USB-2-FULL-HIGH-SPEED-SOLUTIONS … Note "USB 2.0 Full-Speed". The version specifies the spec it's based on, the speed what transfer rate(s) it actually supports within that version.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 27 Feb 2019
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      Replying to @marcan42 @DrPizza @mgrviper

      First random consumer device on Amazon I found: https://www.amazon.com/ORICO-External-Enclosure-Installation-Supports/dp/B01MYTZW5R/ … Note "SuperSpeed USB 3.0". SuperSpeed comes before the USB version even.

      5:37 AM - 27 Feb 2019
      1 reply 0 retweets 0 likes
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        1. Pumpkin Fright 👨‍⚕️ 🍕‏ @DrPizza 27 Feb 2019
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          Replying to @marcan42 @mgrviper

          So for example someone literally just tweeted this Into my timeline. https://www.amazon.com/dp/B06XC1WGQR/ref=cm_sw_r_cp_apa_i_5jPDCbFR8X606 … "USB 3.1", it proudly claims... and then you scroll down and see it's actually only 3.1 gen 1, and so will operate at max speed on 3.0 ports. No 3.1 necessary.

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 27 Feb 2019
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          Replying to @DrPizza @mgrviper

          Yeah, so that marketing is garbage and is exactly what USB-IF does *not* want people to be doing. But I guess they won't listen. I mean at least USB-IF are *trying* to get people not to do that?

          1 reply 0 retweets 1 like
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