X370 Taichi, Goes Blank; Code '00' |
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Ivan_83
Newbie Joined: 22 May 2017 Status: Offline Points: 85 |
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IMHO it is boot loop.
MOBO BIOS do soft reset, '00' leds is off for a very short time, then run startup sequence and set '00', then check some thing (I suspect MCE status), see that some thing wrong and do soft reset. Again and again. '00' flashes = BIOS stick/fail at first boot step. My first guess was that watchdog and may be some other devices without drivers not initialized as it should and may be watchdog fire reboot random time later. But then I find MCE, and look like more reasonable that CPU reports about some error to OS/BIOS, OS do panic and software reboot. OS do not clean MCE status registers, I found comment on kernel code: /* * Clear machine check. Don't do this for uncorrectable * errors so that the BIOS can see them. */ Then BIOS try init but don't clean MCE too, but check it. I have no experience in UEFI + asm hacking (to many reverse engineering for me) to check this guess and have no time to start experiments. All what I can is playing around MCE code in FreeBSD kernel, try to catch MCE event and decode it. |
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Atan87
Newbie Joined: 01 May 2017 Status: Offline Points: 25 |
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Mine does the same. That is not a bootloop, it's not even trying to boot.
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Ivan_83
Newbie Joined: 22 May 2017 Status: Offline Points: 85 |
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Yes, reset/power cycle is enough to reset CPU internal registers (MCE, watchdog and others) and fix '00' POST code and failure.
This is not error messages. This is output from pciconf utility. I dont understand about internal UEFI devices. As you can see ryzen mostly supported by FreeBSD. CPU topology detect correctly, all devices that have drivers works OK. I think that other OSes users from my links have same issue - not OS specific. No, I dont change UEFI/BIOS file. Edited by Ivan_83 - 25 May 2017 at 3:34pm |
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parsec
Moderator Group Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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So a simple PSU power cycle or press of the Reset button is enough to reset internal CPU registers? Or that somehow resets/initializes the watchdog? You said both of those things would fix the "00" POST code and POST failure. What is producing all the error messages for the "drivers" you don't have? They seem to be internal UEFI/BIOS code? Wait, you are using FreeBSD 11 x64. You have dismissed using FreeBSD 11 x64 as irrelevant, simply because someone reported a similar issue. AMD states only Windows 10 officially supports Ryzen. ASRock states only Windows 10 is supported for the X370 Taichi. Have you verified Ryzen support on FreeBSD 11 x64? If that is possible. Have you modified the UEFI/BIOS file yourself? |
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Ivan_83
Newbie Joined: 22 May 2017 Status: Offline Points: 85 |
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Atan87
Newbie Joined: 01 May 2017 Status: Offline Points: 25 |
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No bootloop, just stays there doing nothing but showing code 00. I have to power down manually and power on again, which works everytime. Never have to clear cmos at this point.
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Ivan_83
Newbie Joined: 22 May 2017 Status: Offline Points: 85 |
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wardog
Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447 |
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Ivan, disconnect the above two and see what gives. MCE's are hardware problems bad enough to stop/halt a computer. The ODD is real old. 9+ years or so. The card reader? Internal or external? Irrelevant, as most are temperamental at best and a PITA at worst. Disconnect both the ODD and card reader and see if these MCEs reoccur. |
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Ivan_83
Newbie Joined: 22 May 2017 Status: Offline Points: 85 |
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You got boot loop with code '00'? If yes then +1 for my theory that BIOS does not clear MCE on soft reboot, but check it and do soft reboot... If it true - this mean that Asrock should fix startup sequence to reset MCE and I should RMA CPU or report to AMD and wait for microcode update. Few peoples from another forum and different vendors mobos report about reboots on video playback, they have no overclock too. |
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Ivan_83
Newbie Joined: 22 May 2017 Status: Offline Points: 85 |
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