Ibuffer throws an error when an archive file (I've tried zip and tar.gz) is inserted into a Dired buffer (with `dired-maybe-insert-subdir'). Recipe for bug and relevant *Messages* below. Actions starting from `emacs -Q`: 1. open directory in Dired with an archive file (C-x d) 2. insert zip contents into Dired buffer with 'i' 3. open Ibuffer (M-x ibuffer) ### In *Messages*: ### Opening directory /archive:file[path-redacted]sampleproject-main.zip:/...done Mark set Updating buffer list... , Method ‘archive’ is not known. Method ‘archive’ is not known. tramp-error: Method ‘archive’ is not known. ### end of *Messages* ### temporary workaround: kill the inserted archive subdir, open/kill relevant *tramp/archive buffer (either directly or via `buffer-list') Thank you Emacs maintainers & bug hunters! This is the best piece of software in the local universe. Peter --- In GNU Emacs 28.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0) of 2022-04-07 built on chupa Windowing system distributor 'The X.Org Foundation', version 11.0.12013000 System Description: Ubuntu 20.04.4 LTS Configured using: 'configure --with-native-compilation' Configured features: CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG LCMS2 LIBSELINUX LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB Important settings: value of $LC_COLLATE: C value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Major mode: Messages Minor modes in effect: shell-dirtrack-mode: t tooltip-mode: t global-eldoc-mode: t show-paren-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t buffer-read-only: t line-number-mode: t indent-tabs-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow comp comp-cstr warnings rx cl-extra help-mode sort mail-extr emacsbug message rmc puny rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util rmail rmail-loaddefs text-property-search mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils misearch multi-isearch ibuffer ibuffer-loaddefs conf-mode tramp-sh mule-util tramp-archive tramp-gvfs tramp-cache zeroconf url-util url-parse url-vars dbus xml tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat shell pcomplete comint ansi-color ring parse-time iso8601 ls-lisp format-spec auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache json map seq byte-opt gv bytecomp byte-compile cconv time-date subr-x dired-aux cl-loaddefs cl-lib dired dired-loaddefs iso-transl tooltip eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice button loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty make-network-process native-compile emacs) Memory information: ((conses 16 128121 6660) (symbols 48 10578 1) (strings 32 33861 1448) (string-bytes 1 1124813) (vectors 16 22008) (vector-slots 8 420356 8984) (floats 8 41 262) (intervals 56 616 0) (buffers 992 15))