This bug was fixed in the package fontconfig - 2.12.6-0ubuntu2
---------------
fontconfig (2.12.6-0ubuntu2) bionic; urgency=medium
* Upload proposed patch from upstream bug #103652. If the fontconfig cache
was built on a system that has nanosecond timestamps and then later
transplanted to one that doesn't - for example by mksquashfs as part of a
live CD build - we consider the cache invalid and rebuild it during the
boot process. Depending on the fonts involved, this can take a significant
amount of time and potentially cause knock-on timeouts. The approach in
this patch is to ignore the nanosecond portion of the cache's value if we
get 0 when stat()ing the referenced directory, meaning it is considered
fresh if the rest of the timestamp matches. (LP: #1749546)
-- Iain Lane <i...@orangesquash.org.uk> Thu, 05 Apr 2018 17:13:52
+0100
** Changed in: fontconfig (Ubuntu Bionic)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1749546
Title:
Booting a live session is slow - fontconfig regenerates its font cache
Status in Fontconfig:
Confirmed
Status in fontconfig package in Ubuntu:
Fix Released
Status in fontconfig source package in Bionic:
Fix Released
Bug description:
On Bionic Ubuntu Desktop booting to a live session is slow. It takes
roughly 2 min on my test machine to boot from the "Try or Install
Ubuntu" boot menu to a usable session.
It also takes 1 minute to logout and 17s to log in again.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: casper 1.388
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CasperVersion: 1.388
CurrentDesktop: ubuntu:GNOME
Date: Wed Feb 14 16:43:19 2018
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180214)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
SourcePackage: casper
UpgradeStatus: No upgrade log present (probably fresh install)
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