Score:1

NO Southbridge IOAPIC found

mm flag

I started my PC today and I saw the error messages regarding IOAPIC[4] not in IVRS table and few others.It gets me back to this emergency mode whenever I start ubuntu.Windows 10 in my system is working fine.

It also says can't request region for resource [mem 0xddddd000-0xddde0fff]. Here is the complete image of error.I need help in fixing this

Please help me in getting rid of this error.

Edit: Complete error message enter image description here

j0h avatar
au flag
j0h
tell us more about your setup. is this a dual boot? can you still boot/ reach a root shell?
Kanhaiya avatar
mm flag
@j0h yes it is a dual boot.I can easily start windows 10 and yes, I can reach the root shell. It is a lenevo IdeaPad 330 laptop. My ubuntu version is 20.04. If you need any more details, please let me know !
j0h avatar
au flag
j0h
well, this seems to be a known bug. lenovo seems to think booting in uefi mode will help, though Im not sure about that. another thread I was reading said the error vanished after a bios update. everything else says this is a non critical bug, as in it shouldnt prevent your system from booting. does this computer even have a southbridge? are you able to boot into the desktop mode?
Kanhaiya avatar
mm flag
@j0h, there was no such bug yesterday. Also I am not able to switch to the desktop mode in ubuntu.But I can start windows 10.I will try to update my bios to see if the bug is resolved or not
Kanhaiya avatar
mm flag
@j0h still not able to open. I have updated my question by adding all error messages.Can u please look into it again ?
Score:1
mm flag

The problem was actually the combination of 3 problems. I resolved them one by one after hours of researches and struggles.

First access the maintenance mode as root user.

Then run

  1. nano /etc/default/grub
  2. Replace the content of the line GRUP_CMDLINE_LINUX_DEFAULT by GRUB_CMDLINE_LINUX_DEFAULT="quiet splash ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 iommu=soft"
  3. Save and exit
  4. In my case,there were few corrupt files in /dev/sda9. So I ran fsck /dev/sda9 and gave y to all queries.
  5. Next Reboot using reboot command

If still you are unable to boot, then disable SECURE BOOT in BIOS setting and reboot again.

If still you are unable to open, then enter the recovery mode and look for the error and do research for your error.

EDIT: I posted this answer using my ubuntu OS that i troubleshot few hours ago.

j0h avatar
au flag
j0h
Well done, I'm glad you got it sorted out.
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