El problema ha sido recurrente y cada vez que lo ejecuto fsck /dev/sda4lo soluciona. Sin embargo, el problema sigue repitiéndose.
/dev/sda4 contains a file system with errors check forced
fsck exited with status code 4
/dev/sda4: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
the root file system on /dev/sda4 requires a manual fsck
(initimafs) [10.372378] irq 9: nobody cared:(try booting with the "irqpoll" option
[10.373325] handlers:
[10.373635][<000000000153ecof>] acpi_irq
Disabling IRQ#9