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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. Arnaldo Pirrone‏ @it9exm 1 May 2018
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      Replying to @marcan42

      Can you just try the usual HV tools like XEN, KVM or ESXi? Just in case, my kbd is laying disassembled on an armchair, if it could be helpful for trying out and testing new things.

      1 reply 0 retweets 0 likes
    2. Hector Martin‏ @marcan42 1 May 2018
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      Replying to @it9exm

      Yeah, I'm going to give qemu/kvm with a realtime host kernel a go, see if that performs well enough. It seems I can get 3.5GB of lowmem with qemu which is better than the bare metal (3-3.25)

      1 reply 0 retweets 1 like
    3. Arnaldo Pirrone‏ @it9exm 8 May 2018
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      Replying to @marcan42

      Are there any known tricks to boot the Kronos without connecting the keybed to the rs232 header on the motherboard? (and thus skipping error 19 keybed?)

      1 reply 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 8 May 2018
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      Replying to @it9exm

      I haven't looked into it yet. I could use this... that's the only missing bit I need to pass through to boot it in a VM. I guess I should look at the code again.

      1 reply 0 retweets 1 like
    5. Arnaldo Pirrone‏ @it9exm 22 May 2018
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      Replying to @marcan42

      Today i rooted my kronos always hanging at loading bank data and finally discovered why it did so. KARMA was the culprit. Trying to load PRELOAD.KGE crashes the NKS4 board. (linux keeps running fine). No problems loading PCG and KSC. Time to swap motherboard! B360N-WIFI anyone?pic.twitter.com/IccGl2f3hX

      1 reply 0 retweets 1 like
    6. Arnaldo Pirrone‏ @it9exm 29 Jun 2019
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      Replying to @it9exm @marcan42

      Hi Marcan, i've got a B360N-WIFI ITX Mobo with an I3-8100 and 8gb RAM and snuck it into my kronos, but that obsolete patched kernel is not starting. Also tried with a MSI Z370A-Pro, same happens. Here's a pic, do you have any idea where to start looking?pic.twitter.com/berzMBp3Sr

      1 reply 0 retweets 1 like
    7. Hector Martin‏ @marcan42 29 Jun 2019
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      Replying to @it9exm

      Can't tell from the pic, you'll have to debug it yourself. Maybe try booting with init=/bin/sh and see if you can get a shell?

      1 reply 0 retweets 1 like
    8. Arnaldo Pirrone‏ @it9exm 30 Jun 2019
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      Replying to @marcan42

      Tried with /bin/sh this morning, same error. Then I tried with acpi=off, and it boots! It's definitely something related to ACPI/DSDT/AML. Patching and rebuilding the kernel can help but installing a GCC4 toolchain takes a lot of time. How i wish this could be running in a VM...

      1 reply 0 retweets 0 likes
    9. Hector Martin‏ @marcan42 30 Jun 2019
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      Replying to @it9exm

      I've got it almost running in a VM, but I need to do something about the keybed interface which is a nonstandard serial port...

      1 reply 0 retweets 1 like
    10. Arnaldo Pirrone‏ @it9exm 30 Jun 2019
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      Replying to @marcan42

      Yeah, I remember that it uses 62500 baud with -10V/+10V ref levels. Plus the IT8686E is not supported on this kernel, so the kbd error is always displayed, even with the cable connected.A port of the it87 module is also needed (idk if it's fully supported in the mainline kernel)

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 30 Jun 2019
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      Replying to @it9exm

      The kernel has nothing to do with it; the superIO driver for the keybed serial is in OA.ko (the synth), it doesn't use the Linux driver. If it doesn't support your superIO then the only way to fix it is to patch a new driver into OA.ko, which is not particularly easy...

      4:33 AM - 30 Jun 2019
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      • Arnaldo Pirrone
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        1. Arnaldo Pirrone‏ @it9exm 30 Jun 2019
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          Replying to @marcan42

          I'm sorry, I totally forgot that OA.ko also controls the superIO, the "-1 operation not permitted" and loadoa fail messages were deceiving me. Maybe being able to finish boot w/o connecting the keybed could be useful for testing purposes, but that will also require patching OA.ko

          1 reply 0 retweets 1 like
        2. Arnaldo Pirrone‏ @it9exm 23 Jul 2019
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          Replying to @it9exm @marcan42

          Small update: just tried with an h110i-plus, same as yours, but i have an i3-7100. Besides acpi=off needed, the loading of rtai_sched.ko fails with a divide error because TimeBase freq is 0 hz. I assume there is something wrong with this running on Kaby Lake...

          1 reply 0 retweets 1 like
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