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PC (Ubuntu 16.04 LTS) suddenly shut down beacuse battery ended and now I can't boot properly.

I can reach root terminal or I can boot with recovery mode. this is what I get after boot:

ACPI Error: Field [TBF3] at bit offset/length 32786/491520 exceeds size of target Buffer (262144 bits) (20170531/dsopcode-235)
ACPI Error: Method parse/execution failed _SB.PCIO.POP2.VGA.GETB, AE_AML_BUFFER_LIMIT (20170531/psparse-550)
ACPI Error: Method parse/execution failed \SB.PCIO.POP2.VGA._ROM, AE_AML_BUFFER_LIMIT (20170531/psparse-550)
/dev/sda1: clean, 741668/8011776 files, 7170116/32043264 blocks
Welcome to emergency mode! [...]

I tried to check the logs and at the end I see:

[...]
kernel: ACPI Warning: _SB.PCIO.POP2.VGA._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20170531/nsarguments-95)
kernel: ACPI Warning: _SB.PCIO.POP2.VGA._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20170531/nsarguments-95)
kernel: nouveau 0000:01:00.0: DRM: suspending console...
kernel: nouveau 0000:01:00.0: DRM: suspending display...
kernel: nouveau 0000:01:00.0: DRM: evicting buffers...
kernel: nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle...
kernel: nouveau 0000:01:00.0: DRM: suspending fence...
kernel: nouveau 0000:01:00.0: DRM: suspending object tree...

I have no idea what i'm looking at, I've tried with

fsck /

from recovery mode and it gives me no error, I tried to set from the grub

acpi=off

or

acpi=strict

but nothing solved the issue, plz help me I don't know what to do and I need to recover my system.

  • I was trying to boot in recovery mode (it worked for a few times while I was trying to solve this) and for a moment I saw something like filesystem inconsistency in home folder or something like that. I'm trying to check that log better but I'm not sure how, I'll keep the post updated – Riccardo Apr 11 '18 at 8:10
  • reading various posts around I guess the ACPI error might not be the real issue but something that might be pre-existent but unnoticed, I tried to select an older kernel on GRUB and didn't show that ACPI error while still going in emergency mode only ( i could only choose to go in root shell, no graphic allowed – Riccardo Apr 11 '18 at 9:49

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