[SOLVED] Kernel panic...

The_Great_Sephiroth · Posted: Mon Feb 12, 2018 7:09 am Post subject: [SOLVED] Kernel panic...

OK, got a new issue. Both cores panic on boot now. Not sure why.

Panic image

What's going on here? I cannot do anything after this except hold the power button. I cannot even scroll up to see anything else.
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bunder · Bodhisattva Joined: 10 Apr 2004 Posts: 5934

The_Great_Sephiroth · Posted: Mon Feb 12, 2018 2:42 pm Post subject:

I just updated, but how do I get to the point where I can see the real issue so I can begin to fix it?

I just booted System Rescue CD and mounted everything. No logs at all from the time or date of the panic.

*UPDATE*

OK, I recorded a video of the boot sequence with my Android phone. Stepping through the frames the last thing I see is my SATA link powering down, right after the DVD-RAM drive is detected. Going to check my SATA settings.
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The_Great_Sephiroth · Posted: Mon Feb 12, 2018 3:57 pm Post subject:

OK, upon booting System Rescue I decided to check the output there also. Is it normal for the HDD and ODD links to go down?

The_Great_Sephiroth · Posted: Mon Feb 12, 2018 7:28 pm Post subject:

Alright, I have rebuilt my kernel from scratch and still get this. The configuration imported from 4.9.72 seems to work, but the 4.9.76 hand-made one is not working. Below is a paste of the two files. The left side is the new configuration and the right side is the old.

Kernel configs
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The_Great_Sephiroth · Posted: Tue Feb 13, 2018 3:29 am Post subject:

OK, I am stuck. I believe I have everything needed to boot the system, but it just keeps crashing and I cannot figure out what to do next. Below is my hardware info and kernel config.

Kernel config
Hardware info
USB info

What am I not doing, or doing wrong?
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The_Great_Sephiroth · Posted: Wed Feb 14, 2018 3:37 pm Post subject:

Can somebody please direct me as to what I can do to get an entire crash dump? I cannot see a good chunk of this dump and as such, I cannot figure it out. I have tried a few things I found on the web to enable it to log, but that isn't working.
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NeddySeagoon · Posted: Wed Feb 14, 2018 7:18 pm Post subject:

The_Great_Sephiroth,

Your SATA is a red herring.

The_Great_Sephiroth · Posted: Wed Feb 14, 2018 9:31 pm Post subject:

OK, I did not see the five and six. Also, the kernel panic is linked in the first post in this thread. Each time it crashes the message is the same.
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NeddySeagoon · Posted: Thu Feb 15, 2018 11:55 am Post subject:

The_Great_Sephiroth,

We need the text message that introduces the panic.
Its scrolled off the top of the screen.

It will start with the words "Kernel Panic"
You might get it with a video. It may take several goes before you capture it.
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Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

The_Great_Sephiroth · Posted: Thu Feb 15, 2018 4:11 pm Post subject:

I've tried recording video several times and it blurs. I do not have a 120fps camera unfortunately, only the one on my Galaxy Note 4. I will try again, but so far it always comes out as a jumble of crap when I record it. I cannot scroll up after the crash either, and I cannot get it to record the crash to file.
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NeddySeagoon · Posted: Thu Feb 15, 2018 4:15 pm Post subject:

The_Great_Sephiroth,

Post the blur ... we might be able to work out what it says from the line length.

If the system that crashes has a real serial port, a serial console is an option.
That well need another system that has some way of picking up the serial data stream.
A USB to serial converter will be OK here but no on the system that crashes.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

The_Great_Sephiroth · Posted: Thu Feb 15, 2018 4:21 pm Post subject:

I finally got a good capture. Blurry, but I saw it stating it could not mount root.

NeddySeagoon · Posted: Thu Feb 15, 2018 5:32 pm Post subject:

The_Great_Sephiroth,

That panic says that their is a bit missing to allow the kernel to talk to the HDD.

Your config looks good to me, so lets see if its likely to belong to the kernel you are trying to boot.
The idea is to check timestamps on the relevant files.

Starting with .config, which should be the oldest, make a note of the timestamp on the file.
Next, arch/x86/boot/bzImage must be newer, if it was generated from that config.

Lastly /boot/<kernel_binary> should have the same or later timestamp as arch/x86/boot/bzImage.

Ahhh ..

The_Great_Sephiroth · Posted: Thu Feb 15, 2018 5:44 pm Post subject:

Oh crap I cannot believe I missed that! I could have SWORN I set the SCSI section up. I in fact did not set ANYTHING in that section. I just went through and did that. This is a CLASSIC facepalm moment.
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The_Great_Sephiroth · Posted: Fri Feb 16, 2018 12:15 am Post subject:

That was it. My entire SCSI section was blank. I cannot believe I screwed up in such a simple way, but I did not even think of SCSI, only the SATA/AHCI stuff, which was set. Lesson learned. Thank you very much for your help, Neddy. Yes, I can be an idiot when I am worn out on a problem!
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Ever picture systemd as what runs "The Borg"?