From unknown Tue May 05 13:56:01 2026 X-Loop: owner@bugs.x2go.org Subject: Bug#1369: [X2Go-Dev] Bug#1369: Bug#1369: Keys do not release when using Emacs in X2GO Client Reply-To: "Andreas Ehliar - Emacs related" , 1369@bugs.x2go.org Resent-From: "Andreas Ehliar - Emacs related" Resent-To: x2go-dev@lists.x2go.org Resent-CC: X2Go Developers X-Loop: owner@bugs.x2go.org Resent-Date: Thu, 14 Jan 2021 16:45:02 +0000 Resent-Message-ID: Resent-Sender: owner@bugs.x2go.org X-X2Go-PR-Message: followup 1369 X-X2Go-PR-Package: x2goclient X-X2Go-PR-Keywords: References: Received: via spool by 1369-submit@bugs.x2go.org id=B1369.161064247812485 (code B ref 1369); Thu, 14 Jan 2021 16:45:02 +0000 Received: (at 1369) by bugs.x2go.org; 14 Jan 2021 16:41:18 +0000 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ymir.das-netzwerkteam.de X-Spam-Level: X-Spam-Status: No, score=0.8 required=3.0 tests=BAYES_50,HTML_MESSAGE, SPF_HELO_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from smtpout-51.fbg1.glesys.net (smtpout-51.fbg1.glesys.net [IPv6:2a02:751:100:2::51]) by ymir.das-netzwerkteam.de (Postfix) with ESMTPS id C12D65DAC1 for <1369@bugs.x2go.org>; Thu, 14 Jan 2021 17:41:15 +0100 (CET) Received: from mail.glesys.se (185-39-145-142-static.serverhotell.net [185.39.145.142]) by mail-halon-02.fbg1.glesys.net (Halon) with ESMTPA id 4ee5ffff-5687-11eb-b529-ebc997f73d07; Thu, 14 Jan 2021 17:41:10 +0100 (CET) Mime-Version: 1.0 Date: Thu, 14 Jan 2021 16:41:10 +0000 Content-Type: multipart/alternative; boundary="----=_Part_287_295559224.1610642470" Message-ID: <49edd52e90648791d560769cf7625f94@mail.glesys.se> X-Mailer: Afterlogic webmail client From: "Andreas Ehliar - Emacs related" To: 1369@bugs.x2go.org X-Priority: 3 (Normal) ------=_Part_287_295559224.1610642470 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable I may have found a hint of the root cause of this bug (tested with emacs = 27.1).=0AI believe that it is related to clipboard updating. If I disable= clipboard updating from emacs the stuck key behavior goes away.=0ANote t= hat for every line that we widen the selection in emacs the clipboard is = automatically updated. (I proved this by repeatedly pressing ctrl-v in no= tepadwhile emacs exhibited the stuck key behavior and each time the paste= d text grew.)=0AIf it turns out that emacs and/or x2go prioritizes clipbo= ard updates before key-up events we may end up in a race where the clipbo= ard takes longer to update than it takes emacs to scroll the cursor one l= ine and enlarge the clipboard even further.=0ATo play around with this yo= u can redefine the gui-set-selection function as a nop in emacs to disabl= e the updating. (This is not a workaround though since it completely disa= bles copying from an emacs window. A better work-around may be to add som= e sort of rate-limit to this function but I haven't played around with th= at yet.)=0A(defun gui-set-selection (type data))=0A/Andreas ------=_Part_287_295559224.1610642470 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

I may have found a hint of the root cause of this bug (tested wit= h emacs 27.1).

I believe that it is related = to clipboard updating. If I disable clipboard updating from emacs the stu= ck key behavior goes away.

Note that for every line that we wid= en the selection in emacs the clipboard is automatically updated. (I prov= ed this by repeatedly pressing ctrl-v in notepadwhile emacs exhibited the= stuck key behavior and each time the pasted text grew.)

If it turns out that emacs and/or x2go prioritize= s clipboard updates before key-up events we may end up in a race where th= e clipboard takes longer to update than it takes emacs to scroll the curs= or one line and enlarge the clipboard even further.

<= div>To play around with this you can redefine the gui-set-selection funct= ion as a nop in emacs to disable the updating. (This is not a workaround = though since it completely disables copying from an emacs window. A bette= r work-around may be to add some sort of rate-limit to this function but = I haven't played around with that yet.)

(defun g= ui-set-selection (type data))

/Andreas

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