https://bugs.documentfoundation.org/show_bug.cgi?id=173371
Bug ID: 173371
Summary: LibreOffice 26.8 cannot open files from an
rclone-mounted Google Drive on Linux
Product: LibreOffice
Version: 26.8.0.3 release
Hardware: All
OS: Linux (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: LibreOffice
Assignee: [email protected]
Reporter: [email protected]
Description:
LibreOffice 26.8 cannot open files from an rclone-mounted Google Drive on
Linux, while normal filesystem reads and ONLYOFFICE work.
Environment
OS: Linux Mint 22.3 (Ubuntu 24.04/Noble base)
Architecture: x86_64
Kernel: 7.0.0-30-generic
LibreOffice: 26.8.0.3
LibreOffice executable: /usr/bin/libreoffice
rclone: 1.75.0
Remote: Google Drive
Mount type: FUSE/rclone
Mount point: /home/user/GoogleDrive [personal username masked]
ONLYOFFICE Desktop Editors: 9.4.0, system Flatpak
Problem
LibreOffice 26.8.0.3 cannot open files directly from a Google Drive
filesystem mounted using rclone.
LibreOffice displays: “Read Error! Data could not be read from the
file.”
The problem is not specific to PPTX: a simple TXT file on the same
mounted filesystem produces the same error.
The same PPTX can be read using normal Linux filesystem operations and
opens successfully in ONLYOFFICE directly from the mount.
LibreOffice opens the same PPTX normally when it is copied to local
storage.
Reproduction
Mount a Google Drive remote using rclone/FUSE.
Navigate to a directory on the mounted filesystem.
Open a simple TXT file or PPTX directly from the mounted filesystem
using LibreOffice.
LibreOffice displays: “Read Error! Data could not be read from the
file.”
Sanitized rclone configuration
--vfs-cache-mode off
--vfs-cache-max-size 50G
--vfs-cache-max-age 720h
--dir-cache-time 1h
--poll-interval 0
--vfs-write-back 10m
--vfs-read-ahead 128M
--cache-dir=/home/user/.cache/rclone [username masked]
--log-level INFO
Earlier controlled tests were also performed with --vfs-cache-mode full
and --vfs-cache-mode writes. LibreOffice failed with all three cache modes.
Diagnostic evidence
Direct rclone download works: the affected PPTX can be copied directly
from the Google Drive remote with rclone and produces a valid file.
Reading through the rclone mount works with --vfs-cache-mode off: a
normal cp operation successfully copied the PPTX to local storage.
The copied PPTX passes unzip -t with all tested entries returning OK
and the final result “No errors detected in compressed data.”
Random-access reads through the mount work: a Python test successfully
read the complete file and successfully sought to byte positions 100 and
100000.
ONLYOFFICE Desktop Editors 9.4.0 successfully opens the same PPTX
directly from the rclone-mounted Google Drive.
LibreOffice successfully opens the same PPTX after it is copied to
local storage.
LibreOffice also fails with a simple TXT file located on the mounted
filesystem.
LibreOffice Troubleshoot/Safe Mode was tested using 'libreoffice
--safe-mode'; the mounted file still produced the same Read Error.
Representative test results
Random-access test output:
SIZE: 340059
SEEK 100: 100
SEEK 100000: 100
RANDOM ACCESS: OK
ZIP integrity test ended with: “No errors detected in compressed data
of [sanitized test presentation].pptx”
Additional rclone observation
When VFS caching was enabled during earlier testing, rclone repeatedly
logged errors similar to:
vfs cache: failed to _ensure cache
failed to start downloader
failed to open downloader
vfs reader: failed to open source file: invalid seek position
After changing to --vfs-cache-mode off, ordinary copying and
random-access reads succeeded, while LibreOffice continued to report the Read
Error.
Expected behaviour
LibreOffice should be able to open a normal readable file from a
standard FUSE/rclone-mounted filesystem in the same way that other desktop
applications can.
Actual behaviour
LibreOffice 26.8.0.3 reports “Read Error! Data could not be read from
the file.” for files on the rclone-mounted Google Drive filesystem.
The files are readable through normal Linux filesystem operations and
the same PPTX is successfully opened by ONLYOFFICE.
Workarounds
Copy the file from the rclone mount to local storage and open it in
LibreOffice.
Open the file directly from the rclone mount using ONLYOFFICE Desktop
Editors 9.4.0.
Assessment
The controlled tests suggest a compatibility problem involving
LibreOffice 26.8.0.3 and the rclone/FUSE-mounted Google Drive filesystem.
The evidence does not indicate corruption of the test file, a general
Google Drive access problem, inability of the mount to perform random reads, or
a normal LibreOffice user-profile problem.
Because the same mounted PPTX works in ONLYOFFICE and ordinary/random
filesystem reads succeed, the failure appears specific to the way LibreOffice
accesses the mounted filesystem.
Safe mode of Libreoffice was tried but it didn't work too.
Steps to Reproduce:
In the description
Actual Results:
In the description
Expected Results:
Files should have opened with Libreoffice from google drive
Reproducible: Always
User Profile Reset: Yes
Additional Info:
The problem wasn't there with the earlier version of Libreoffice.
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