org-roam-mode buffer broken due to (global-)page-break-lines-mode (Spacemacs continuously switches major-mode)

[dalanicolai]

Description :octocat:

org-roam-mode buffer is broken due to (global-)page-break-lines-mode

Reproduction guide :beetle:

• Start Emacs

• Install org-roam via the org-mode layer instructions

• Additionally carry out the setting up instructions of the org-mode manual.

• Create a node using M-x org-roam-node-find followed by C-c C-c

• Within that note create another note but now using M-x org-roam-node-insert (and submit with C-c C-c)

• follow the link to the newly created note

• in the 'new note' buffer do M-x org-roam-buffer-toggle

There should be a backlink, otherwise there is a bug (which probably has not yet been reported). If there is no backlink then customize the org-roam-mode-section-functions. There settings are correct, but possibly have to get 'reapplied`. Please note down as a bug.

Finally if there is a backlink then notice that you can not follow it by placing the cursor on it and pressing enter. If you switch off global-page-break-lines-mode before creating the org-mode buffer (delete and toggle again), then the link does work (as already reported here.

Now the org-roam-mode is derived from special-mode (via magit-section-mode-hook) and, as none of these modes is included in page-break-lines-modes, should be excluded from global-page-break-lines-mode. However Spacemacs, somehow designates the org-roam-mode buffer as (over here) either an emacs-lisp-mode buffer or an org-mode buffer.

Now it took me a long time to find the culprit, and still help is appreciated. So to see what is causing the problem evaluate the following lines:

(defun derived-mode-p (&rest modes)
  "Non-nil if the current major mode is derived from one of MODES.
Uses the `derived-mode-parent' property of the symbol to trace backwards."
  (apply #'provided-mode-derived-p (print major-mode) modes))

now just observe what happens. Spacemacs is switching modes continuously.

The derived-mode-p function is used in page-break-lines-mode-maybe.

So maybe for now we can indeed first switch-off global-page-break-lines-mode for users of org-roam-mode (as suggested here).

Observed behaviour: :eyes: :broken_heart: backlinks don't work

Expected behaviour: :heart: :smile: backlinks work

System Info :computer:

• OS: gnu/linux
• Emacs: 28.0.50
• Spacemacs: 0.300.0
• Spacemacs branch: develop (rev. 40ae5e229)
• Graphic display: t
• Distribution: spacemacs
• Editing style: vim
• Completion: ivy
• Layers:

  (erc restclient test-layer robot-framework
   (org-wiki :variables org-wiki-location "~/Sync/org/wiki")
   command-log
   (latex :variables latex-backend 'company-auctex)
   auto-completion gnus emacs-lisp common-lisp
   (scheme :variables scheme-implementations
           '(guile racket mit))
   (clojure :variables clojure-enable-linters 'clj-kondo)
   racket
   (haskell :variables haskell-completion-backend 'dante)
   git helm
   (ivy :variables ivy-enable-icons t)
   lsp dap markdown multiple-cursors
   (spacemacs-evil :variables spacemacs-evil-collection-allowed-list 'nil)
   helpful c-c++ rust julia python
   (jupyter :variables org-babel-jupyter-resource-directory "~/org/jupyter")
   ipython-notebook yaml javascript
   (org :variables org-directory "~/Sync/org" org-default-notes-file "~/Sync/org/notes.org" org-agenda-files
        '("~/Sync/org/google-calendar" "~/Sync/org/contacts.org" "/home/dalanicolai/Sync/org/journal" "/mnt/4EEDC07F44412A81/git/Masterthesis/TODOs.org" "~/spacemacs/diary.org")
        org-enable-notifications t org-start-notification-daemon-on-startup t org-enable-org-journal-support t org-journal-enable-agenda-integration t org-journal-dir "~/Sync/org/journal/" org-journal-file-format "%Y%m%d.org" org-journal-file-type 'weekly org-enable-roam-support t org-enable-templated-html-support t org-enable-github-support t org-enable-reveal-js-support t org-enable-org-contacts-support t org-contacts-files
        '("~/Sync/org/contacts.org")
        org-capture-templates
        '(("c" "Contacts" entry
           (file "~/Sync/org/contacts.org")
           "* %(org-contacts-template-name)\n          :PROPERTIES:\n          :EMAIL: %(org-contacts-template-email)\n          :PHONE:\n          :ALIAS:\n          :NICKNAME:\n          :IGNORE:\n          :ICON:\n          :NOTE:\n          :ADDRESS:\n          :BIRTHDAY:\n          :END:")))
   (bibtex :variables bibtex-dialect 'biblatex bibtex-enable-ebib-support t bibtex-files
           '("/mnt/4EEDC07F44412A81/jabref/main/main.bib")
           ebib-default-directory "/mnt/4EEDC07F44412A81/jabref/main/files" ebib-preload-bib-files bibtex-files ebib-file-search-dirs
           '("/mnt/4EEDC07F44412A81/jabref/main/files")
           ebib-import-directory "/mnt/4EEDC07F44412A81/jabref/main/files" org-ref-default-bibliography
           '("/mnt/4EEDC07F44412A81/jabref/main/main.bib")
           bibtex-completion-bibliography
           '("/mnt/4EEDC07F44412A81/jabref/main/main.bib")
           org-ref-get-pdf-filename-function 'org-ref-get-zotero-filename ebib-window-vertical-split 'above)
   (shell :variables shell-default-height 30 shell-default-position 'bottom)
   spell-checking syntax-checking version-control treemacs pdf djvu toc
   (calibre :variables calibredb-root-dir "/mnt/4EEDC07F44412A81/Calibrebibliotheek" calibredb-add-delete-original-file "yes" calibredb-download-dir "~/Downloads" calibredb-fetch-covers "yes" calibredb-show-entry-switch 'switch-to-buffer-other-window calibredb-show-results t calibredb-title-width 84 calibredb-author-width 25 calibredb-tag-width 14 calibredb-comment-width 32)
   epub fasd html github
   (sql :variables sql-capitalize-keywords t sql-lsp-sqls-workspace-config-path 'workspace)
   csv eaf eww info maxima)

• System configuration features: CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB

Backtrace :paw_prints:

[dalanicolai]

While I wanted to report the backlink issue, I also noticed that this 'Spacemacs bug' was already reported: https://github.com/org-roam/org-roam/issues/1732

So also it seems that backlinks do not get created before "(re)applying" the org-roam-mode-section-functions or restarting Spacemacs. This seems to have been reported already also: https://github.com/org-roam/org-roam/issues/1708

[dalanicolai]

I am not sure what the bug-tracker label means; but I guess it means this is an upstream bug? Because I think this really is a Spacemacs bug.

[lebensterben]

bug tracker means this is a confirmed bug. if there's a future bug fix or workaround, this will be the tracking issue.

[duianto]

I guess it means this is an upstream bug?

There is a separate Upstream label.

[dalanicolai]

Thanks! Handy to know...

[mattford63]

After disabling page-break-lines globally, locally, everywhere this issues still occurs.

However if after displaying the org-roam backlink buffer you manually do a org-roam-buffer-refresh it will work (but only if page-break-lines is disabled)

[Sergey-Makarov]

Here is a simple solution that works for me so far and does not require disabling any of the modes (including page-break-line-mode and display-line-number-mode): https://github.com/org-roam/org-roam/issues/1732#issuecomment-1465326574

[lebensterben]

@dalanicolai

please verify whether it fixes your issue

[nickanderson]

The elisp linked by @Sergey-Makarov (https://github.com/org-roam/org-roam/issues/1732#issuecomment-1465326574) fixes this issue for me as well.

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