[Bug 1923731] Re: Can't install from USB, at the end can't copy to /boot/something and update-grub fails with "no space left on device", but there is space

[Chris Guiver]

Possible duplicate of
https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1923134

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Bug reporting is mostly about finding & fixing problems thus preventing
future users from hitting the same bug.

I suspect a Support site would be more appropriate, eg.
https://answers.launchpad.net/ubuntu. You can also find help with your
problem in the support forum of your local Ubuntu community
http://loco.ubuntu.com/ or asking at https://askubuntu.com or
https://ubuntuforums.org, or for more support options please look at
https://discourse.ubuntu.com/t/community-support/709

(Note:  many support sites don't support development releases, IRC and
Ubuntu Forums have ubuntu+1 areas where you are on-topic though)

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https://bugs.launchpad.net/bugs/1923731

Title:
  Can't install from USB, at the end can't copy to /boot/something and
  update-grub fails with "no space left on device", but there is space

Status in grub-installer package in Ubuntu:
  New

Bug description:
  I'm trying to install Ubuntu 21.04 beta.
  I already have installed Ubuntu 20.04.
  I'm installing on a disk that is booted in BIOS mode normally, reusing the /home partition (i.e. side-by-side with the existing Ubuntu 20.04).

  
  The disk is BIOS mode. I tried booting from the install USB in both UEFI and Legacy mode, the install fails in the same way at the very end. The message with "no space left on device" is misleading, there is space. Probably the installer is trying to write to the USB itself, which is probably read-only thus the error. Very annoying: GRUB also did update the MBR, thus I can't even boot the previous partition. Not only did the install fail, it also broke my system! Critical.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubiquity 21.04.13
  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: Wed Apr 14 11:35:19 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Beta amd64 (20210331.1)
  ProcEnviron:
   LANGUAGE=en_US.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   LC_NUMERIC=C.UTF-8
  RebootRequiredPkgs:
   linux-image-5.11.0-13-generic
   linux-base
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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