Laptop Boot Issue: Troubleshooting Emergency Mode in Ubuntu
Unexpected Boot Failure
Recently, my laptop encountered an unexpected issue during the boot process. Despite running Ubuntu 20.04.5 LTS with a dual-boot configuration with Windows, I had not made any recent changes or updates. Upon attempting to boot into Ubuntu, I was met with an emergency mode screen.
Emergency Mode Troubleshooting
In emergency mode, I executed the command journalctl -xb to view the system logs and systemctl reboot to reboot the system. However, the issue persisted. I then attempted to boot into default mode via systemctl default or D, but to no avail.
Error Message Analysis
Upon further investigation, I ran the command dmesg | grep tpm_crb and noticed the following error messages:
- ACPI region does not cover the entire commandresponse buffer Mem 0xfed40000-0xfed4087f flags 0x201 vs fed40080 f80
- Firmware bug tpm_crb msft0101 firmware bug after updating to the kernel 5.16.0-22.24-generic: booting took 25s (delay 25710318) i2c_hid_acpi: Probe of i2c-INT33D100 failed with error -61
- ACPI region does not cover the entire commandresponse buffer Mem 0xdc923000-0xdc923fff flags 0x200 vs dc923000 4000
Possible Issue
These error messages suggest the presence of a firmware bug after a kernel update. The tpm_crb bug is a known issue that can affect the startup process in Ubuntu systems.
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