subiquity

Long delay on boot without any feedback is disconcerting

Bug #1750873 reported by Mark Shuttleworth
14
This bug affects 2 people
Affects Status Importance Assigned to Milestone
subiquity
Triaged
High
Unassigned
livecd-rootfs (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

On boot, I saw the accessibility prompt (keyboard and davinci-man) and then had a very long wait with a black screen, flashing cursor and no prompt until the 18.04 robot-dot plymouth boot splash came up. Is this the boot time? Can plymouth come up sooner?

Related branches

lp://qastaging/~mwhudson/livecd-rootfs/live-server-gzip-initramfs
Steve Langasek: Approve
Balint Reczey: Pending requested
Diff: 56 lines (+14/-3)
2 files modified
debian/changelog (+7/-0)
live-build/auto/config (+7/-3)
lp://qastaging/livecd-rootfs
Steve Langasek (vorlon)
Changed in subiquity:
importance: Undecided → High
Revision history for this message
Michael Hudson-Doyle (mwhudson) wrote :

Step 1: investigate and time things so we can quantify the problem and any improvements we make.

Changed in subiquity:
status: New → Triaged
Francis Ginther (fginther)
tags: added: id-5a9fa372b59e78cb69e10cbe
Revision history for this message
Michael Hudson-Doyle (mwhudson) wrote :

I think about half of the delay is spent unpacking the initramfs, suggesting that switching to lz4 or gzip compression instead of the current lzma might help significantly (this sounds familiar from other contexts...)

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package livecd-rootfs - 2.521

---------------
livecd-rootfs (2.521) bionic; urgency=medium

  * In subiquity image, mount additional squashfs in /media.

livecd-rootfs (2.520) bionic; urgency=medium

  * Make lzma initramfs compression opt-in rather than opt-out, and do not
    opt-in to it for live-server builds to speed up the boot. (LP: #1750873)

 -- Dimitri John Ledkov <email address hidden> Wed, 11 Apr 2018 14:20:27 +0200

Changed in livecd-rootfs (Ubuntu):
status: New → Fix Released
Revision history for this message
Jim Campbell (jwcampbell) wrote :

Is this bug closed? When installing via 20.04.1 live server ISO, I see a message that says:

initramfs unpacking failed: Decoding failed
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip
ima: Error Communicating to TPM chip

...
I'm getting at least 8 instances of that TPM error before the installer continues.

Revision history for this message
Michael Hudson-Doyle (mwhudson) wrote :

I don't have any real ideas for how to make boot faster, so perhaps we should close this bug. Errors relating to TPM communications are definitely something different and should be tackled in a different report!

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