[Bug 1922342] Re: Impish live session takes ages to boot on BIOS systems

Sun May 15 10:24:32 UTC 2022

Hi Thomas Schmitt,

> I wonder what is meant by "add some tweaks".

1. Made grub use UUID instead of device name to identify partition where
to find the grub files

---
# create grub.cfg to match iso file's name

echo -e "$inversvid tweak grub ...$resetvid"

# tweak 3: search by UUID

sleep 2
partprobe
sleep 2
targ1=$(mktemp -d --tmpdir dus.XXXXXXXXXX)
uid2=$(lsblk -o uuid,label "$target" |grep -i 'usbboot'|sed "s% *usbboot%%")
uid3=$(lsblk -o uuid,label "$target" |grep 'isodevice'|sed "s% *isodevice%%")
echo "uid2=$uid2"
echo "uid3=$uid3"
mount -U "$uid2" "$targ1"
sleep 2
if [ "$uid3" != "" ]
then
 sed -i '/set isofile/'a"  search --set=root --fs-uuid $uid3" "$targ1"/boot/grub/grub.cfg
 sed -i 's/(hd0,3)/($root)/' "$targ1"/boot/grub/grub.cfg
 if [ $? -ne 0 ]
 then
  error="$error - sed: tweak 3 grub.cfg"
  result="target drive might work, but setting 'search by UUID' failed :-("
  echo "$result"
 fi
fi
umount "$targ1"
rmdir "$targ1"
sleep 2
partprobe
sleep 1
}
---
# tweak 1: maybe modify label of partition for persistence

mntpt=$(mktemp -d --tmpdir dus.XXXXXXXXXX)
mount -o loop "$source" "$mntpt"
syslbl=$(lsblk -o label,mountpoint | grep "$mntpt"|sed "s% *$mntpt%%")
umount "$mntpt"
sleep 2
isover=$(<<< "$syslbl" grep -o ' [0-9]*\.'|grep -o '[0-9]*')
pptarg=$(lsblk -lo name,label "$target" |grep writable|sed -e 's/ .*//' -e 's#^#/dev/#')

if [ $isover -lt 20 ]
then
 tune2fs -L casper-rw "$pptarg"
 sleep 1
fi

# tweak 2:
# To make Firefox work in Jammy & newer: 
# apparmor.service.d/30_live_mode.conf: ConditionPathExists=

if [ $isover -ge 22 ]
then
 targ1=$(mktemp -d --tmpdir dus.XXXXXXXXXX)
 /bin/echo -e "$inversvid To make Firefox work in Jammy & newer  $resetvid
 apparmor.service.d/30_live_mode.conf: ConditionPathExists="
 umount "$targ1" 2>&1
 targ0=$(mktemp -d --tmpdir dus.XXXXXXXXXX)
 mount -o loop "$source" "$targ0" 2>&1
echo '$pptarg $targ1'": $pptarg $targ1"
 mount "$pptarg" "$targ1" 2>&1
 tghme=$(find "$targ0" -name '*ubuntu*.seed')
# echo "$tghme"
 tghme=${tghme##*/}
 tghme=${tghme%.seed}
 if [ "$tghme" == "ubuntustudio" ]
 then
  tghme='ubuntu-studio'
 elif [ "$tghme" == "" ]
 then
  tghme=$(grep -om1 'ubuntu-kylin' "$targ0"/casper/filesystem.manifest)
 fi
 echo "target's home directory: /home/$tghme"
 mkdir -p "$targ1"/upper/home/"$tghme"/.config/autostart
 mkdir -p "$targ1"/upper/usr/local/sbin
 cp /usr/share/mkusb/fixfox.desktop "$targ1"/upper/home/"$tghme"/.config/autostart
 cp /usr/share/mkusb/fixfox "$targ1"/upper/usr/local/sbin
 umount "$targ1" "$targ0" 2>&1
 rm -r "$targ1" "$targ0"
# read -p "press Enter to continue"
fi
---

I think tweak 3 is most relevant in this case (of this bug report).

I have also noticed that it is difficult to 'make all computers happy
with the same configuration' even within the group that want an MSDOS
partition table.

The bug of this report seems to be somewhat worked around by the version
in dus-iso2usb version 22.0.1, but I think old HP computers with
core2duo processors want a bootable flag on the partition where grub is
located. However, adding that boot flag seems to stop booting in UEFI
mode. I am trying to make a configuration work for all these test cases
...

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https://bugs.launchpad.net/bugs/1922342

Title:
  Impish live session takes ages to boot on BIOS systems

Status in Release Notes for Ubuntu:
  Fix Committed
Status in casper package in Ubuntu:
  Confirmed
Status in casper source package in Impish:
  Confirmed
Status in casper source package in Kinetic:
  Confirmed

Bug description:
  First of all, I change the description of this bug because, thanks to
  Chris Guiver comments, I could check that the live session effectively
  works but it takes too long to complete. That's why I change the
  description of the bug from live session does not boot to live session
  takes ages to boot. I hope this is the best approach to this.

  I think the problem is the same as described here:
  https://discourse.ubuntubudgie.org/t/20-10-grub-error-can-t-find-
  command-grub-platform/4292. I can see prior to grub menu, briefly, the
  same error: Error can't find grub_platform. After the solution
  described below, this error is not showed and the system is able to
  boot.

  I try making the live usb using startup disk creator and with gnome-
  disks --> Restore disk image and get the same results.

  The live-usb has a gpt partition table instead of mbr like 20.04 live-
  usb has. That implies, I think, that the first one does not boot on
  BIOS systems and the second does.

  I try the same live-usb on an EFI laptop and it boots perfectly
  (perhaps it takes long time, but more less than in this case.

  If I try the solution described here:
  https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1905491/comments/8
  then it works.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: casper 1.461
  ProcVersionSignature: Ubuntu 5.11.0-13.14-generic 5.11.7
  Uname: Linux 5.11.0-13-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu61
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.461
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr  2 09:55:24 2021
  LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Beta amd64 (20210331.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=gl_ES.UTF-8
   SHELL=/bin/bash
  SourcePackage: casper
  UpgradeStatus: No upgrade log present (probably fresh install)

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