Tried to install ubuntu alongside win10 in efi mode. installer could not install grub.

[Daniel Ivanov]

Installer could not install grub. Error was about efi partition being in read-only filesystem.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.8.9 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.19.0-25.26~14.04.1-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CasperVersion: 1.340.2
Date: Thu Oct 15 15:26:08 2015
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Your EFI system partition is corrupt. You will need to repair it with dosfsck, or chkdsk in Windows.

[Daniel Ivanov (sekanato)]

For now - problem seems to has resolved by itself. But before that I've tried dosfsck and chkdsk in windows, and both found nothing in my efi partition. At least there was no output to suggest that. Thanks for the advice anyway.