Centos7 kernel downgrade failure 7.6 to 7.5

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cent7
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by cent7 » 2019/01/20 23:05:11

Yes, I did. This leads to the Gnome start black screen.

Please note following progress. I yum removed the 2 problematic 7.6. kernels

Booting on the 7.5. kernel CL-only shell, abrt said it detected a problem. Please see screen shot.

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Xorg server crashed 
Looking at Xorg.0.log at the end of the log there is:

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Segmentation fault at address 0x0
Caught signal 11 (seg fault). Server aborting. 
I can attach full log if needed.

Can you please suggest how to debug or fix? Thanks so much.
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TrevorH
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by TrevorH » 2019/01/20 23:07:21

Did you reinstall the vbox guest additions again now that you have booted the older kernel?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

cent7
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by cent7 » 2019/01/21 00:07:28

No, not yet. I booted via Ctl+Alt+Fn2 to get the terminal shell shown in the screenshot.

Could the X server crash and GuestAdditions be related?

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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by TrevorH » 2019/01/21 01:15:30

Could the X server crash and GuestAdditions be related?
Yes though the crash may also be unrelated.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by toracat » 2019/01/21 01:41:56

@cent7

The kernel (especially the plus kernel) is not problematic. The fact is VBox 5.2.22 is NOT compatible with RHEL/CentOS 7.6. You have to update it to 5.2.24.

[EDIT] I meant GuestAdditions.
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toracat
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by toracat » 2019/01/21 01:54:27

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cent7
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by cent7 » 2019/01/21 03:22:05

@toract

Thank you for the feedback. I just can't risk breaking things further with another upgrade (VirtualBox).
Paragraphase: 7.6 is problematic for my environment.

Update:
reading the xorg.0.1.log I found the following line which indicates errors according to the log semantics:

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LoadModule: "vboxvideo"
(WW) Warning, couldn't open module "vboxvideo"
(EE) Failed to load module "vboxvideo" (module does not exist, 0)


I can post the backtrace if this will help.

How do I activate internet access from this bare-metal command-line shell?

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TrevorH
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by TrevorH » 2019/01/21 07:02:34

(EE) Failed to load module "vboxvideo" (module does not exist, 0)
You need to rebuild the GA against the running kernel.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by toracat » 2019/01/21 07:37:46

@cent7

When you get the terminal shell, try to uninstall the existing GuestAdditions first so you can at least boot to a GUI. Run the /opt/VBoxGuestAdditions-5.2.22/uninstall.sh script (assuming your GA is 5.2.22). Once in the GUI, you should be able to install the GA easily.
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cent7
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Re: Centos7 kernel downgrade failure 7.6 to 7.5

Post by cent7 » 2019/01/21 15:03:07

@toract

I did as recommended:
- Uninstalled GuestAdditions (GA) with its script
- Reinstalled GA
- Reboot then shutdown.

Centos starts and freezes this time at this last line:

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Reached target Switch Root...
Starting Switch Root...
Starting vboxadd-service.service...es..shutdown...DKMS..n.emon.progress polling
What to do?

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