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whitequark's profile
whitequark
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@whitequark

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whitequark

@whitequark

http://whitequark.org  · http://llvm.moe  · http://powerlinesinanime.tumblr.com  · working on quantum computers for a living · DMs open · she

Joined July 2010

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    1. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 16

      Here's a bunch of the fuses, I took a lot of pics so I could get them all mapped out. Any spot with those white smd devices labeled with "PF" followed by a number is a fuse.pic.twitter.com/lkboEZ1PeB

      2 replies 0 retweets 6 likes
      Show this thread
    2. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 16

      Actually scratch that I need to be at work early tomorrow, so instead I'm going to go crash, and I guess tmrw night I'll go after all these fuses? I'm not excited about this part. Gonna list suspicions I have about the failed part, though:

      1 reply 0 retweets 6 likes
      Show this thread
    3. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 16

      All the parts I think are likely candidates are parts which are in direct connection with the main power line and are powered even when the system is off. That narrows the search field to any of the IC's used for initial bringup + 1 outlier.

      1 reply 0 retweets 5 likes
      Show this thread
    4. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 16

      Platform controllers/bringup: we have a set of DC/DC converter controllers etc here. Pic 1, Each of the qfn chips controls a set of FETs which generate the 5V and 20V rails. Pic 2, the main CPU supply controller? Think it drives the on/off button? Pic 3: platform controller...pic.twitter.com/5fXOM0ECT7

      1 reply 0 retweets 7 likes
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    5. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 16

      ...which afaict is a set of different power state functionality controls tied to a basic MCU with low sleep-state power draw, which likely kicks the rest of the computer into gear. Idk, I haven't poked at a PC's guts like this before.

      1 reply 0 retweets 5 likes
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    6. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 16

      Also of potential interest: Pic 1 is just a birds-eye Pic 2 is, I believe, a usb-pd/USB-C controller, likely similar to the one @whitequark was (is?) fighting with. This laptop can charge USB-C devices while off, so its powered somehow. Pic 3: I have no idea. Anyone know?pic.twitter.com/xjRUrjht27

      3 replies 0 retweets 5 likes
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    7. whitequark‏ @whitequark Sep 16
      Replying to @hedgeberg

      DSL6340 is an Intel TBT controller (the firmware is signed), TPS65982 (the firmware isn't signed) is very similar to the chip I was working on and I have one TPS65982 in my laptop

      2 replies 0 retweets 2 likes
    8. shuffle2‏ @shuffle2 Sep 22
      Replying to @whitequark @hedgeberg

      does tbt/pcie actually work on the TI ones?

      1 reply 0 retweets 0 likes
    9. whitequark‏ @whitequark Sep 22
      Replying to @shuffle2 @hedgeberg

      elaborate?

      1 reply 0 retweets 0 likes
    10. shuffle2‏ @shuffle2 Sep 22
      Replying to @whitequark @hedgeberg

      Just curious if non-intel tbt controllers are lacking any features. i had thought intel would keep the specs for some aspects to themselves (some alternate modes, security stuff, etc)

      1 reply 0 retweets 0 likes
      whitequark‏ @whitequark Sep 22
      Replying to @shuffle2 @hedgeberg

      no one except intel makes tbt controllers, the ti chips are usb pd controllers

      1:34 PM - 22 Sep 2018
      1 reply 0 retweets 0 likes
        1. New conversation
        2. shuffle2‏ @shuffle2 Sep 22
          Replying to @whitequark @hedgeberg

          ok, that's what i thought :( just had glanced at http://www.ti.com/product/TPS65982 … and saw "Port Data Multiplexer: Sideband Use Data for Alternate Modes (DisplayPort and Thunderbolt)". guess it's just pass-through(?)

          1 reply 0 retweets 0 likes
        3. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 22
          Replying to @shuffle2 @whitequark

          ...wtf is this tho?pic.twitter.com/3J3m0MPnwt

          1 reply 0 retweets 0 likes
        4. jam1garner‏ @jam1garner Sep 22
          Replying to @hedgeberg @shuffle2 @whitequark

          Looks like a bot that scrapes tweets with links in order to sound real, then replaces the links with some sort of phishing site or something similar.

          2 replies 0 retweets 0 likes
        5. hedge.bat  🦇 🦇 🦇‏ @hedgeberg Sep 22
          Replying to @jam1garner @shuffle2 @whitequark

          Prolly worth reporting. Weird niche market to phish, if that is what this is.

          1 reply 0 retweets 1 like
        6. jam1garner‏ @jam1garner Sep 22
          Replying to @hedgeberg @shuffle2 @whitequark

          Yeah I don't think it's phishing actually, there's a lot of accounts like this that either retweet/steal tweets under a certain topic in order to try and build up a following automatically. It's basically content aggregation for advertisement or something like it

          1 reply 0 retweets 0 likes
        7. jam1garner‏ @jam1garner Sep 22
          Replying to @jam1garner @hedgeberg and

          hard to confirm this since all the links appear to be dead

          0 replies 0 retweets 0 likes
        8. End of conversation

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