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It happened after I formatted (from ubuntu) the windows partition, using file system ntfs. Now only boots in emergency mode.

The log throws two errors: [drm:intel_set_pch_fifo_underrun_reporting [i915] ERROR uncleared pcf fifo underrun on pch transcoder A [drm:intel_pch_fifo_underrun_irq_handler [i915] ERROR PCH transcoder A FIFO underrun

It also say Timed out waiting for decide dev-disk-by.... .device I think it fails to mount the windows partition, but I wouldn't know how to do it myself. I found some suggestions around the internet but was unable to follow them.

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2 Answers 2

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Ok, I just resolved: first I commented out the windows mounting instruction for the boot /etc/fstab, then I was able to start the system normally.

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You found the initial problem that was causing Ubuntu emergency mode. It was trying to mount a dirty Windows partition in fstab.

That happened because the NTFS file system was "dirty". It needs a chkdsk run on it from Windows, or, delete the NTFS partition from Ubuntu using gparted, and recreate the NTFS partition from a running Windows system.

Cheers, Al

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  • Thank you! In alternative, I found it works also by having changed the wrong (old) uuid of windows in /etc/fstab to the new one given by blkid. Commented Jul 19, 2016 at 8:14

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