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Hermes SMTP Server) with ESMTPA ID 0479a84eb7d4d86d3420e0d065bf5f8c; Wed, 06 Dec 2023 12:21:44 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#67628: Emacs 29.1: (x-open-connection (getenv "DISPLAY")) gets "Display :0.0 does not exist" error In-Reply-To: <83sf4f4kcq.fsf@HIDDEN> (Eli Zaretskii's message of "Wed, 06 Dec 2023 13:54:29 +0200") References: <20231204193138.3bb398b8@Elitebook> <83il5d683k.fsf@HIDDEN> <20231205004405.3fc7190e@Elitebook> <83a5qo6dce.fsf@HIDDEN> <87edg0omfn.fsf@HIDDEN> <83sf4f4kcq.fsf@HIDDEN> Date: Wed, 06 Dec 2023 20:21:36 +0800 Message-ID: <875y1bo71r.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.21943 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 1837 X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 67628 Cc: mahlamytsike@HIDDEN, 67628 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: >> From: Po Lu <luangruo@HIDDEN> >> Cc: Herman <mahlamytsike@HIDDEN>, 67628 <at> debbugs.gnu.org >> Date: Tue, 05 Dec 2023 20:37:00 +0800 >> >> Eli Zaretskii <eliz@HIDDEN> writes: >> >> >> If in 29.1 now >> >> $ emacs --daemon -Q >> >> $ emacsclient -e "(setq debug-on-error t)" >> >> then >> >> $ emacsclient -e "(make-frame-on-display (getenv \"DISPLAY\"))" >> >> does not give an error, i.e. the display is found >> >> >> >> but if >> >> $ emacs --daemon -Q >> >> $ emacsclient -e "(setq debug-on-error t)" >> >> then >> >> $ emacsclient -e "(x-open-connection (getenv \"DISPLAY\"))" >> >> gives an error, i.e. the display does not exist. >> > >> > Po Lu, any ideas or suggestions? >> >> The display is opened successfully, but the next event to arrive >> activates the dynamic-setting machinery that calls get-device-terminal, >> which signals an error in response to there being no frames on that >> display at the time. > > So you are saying that this is an issue with the fine timing of when > the event arrives? And if it arrived a bit later, it would have been > processed correctly? No, see below. >> The sound fix is for get-device-terminal to search for the device >> provided within x_display_list instead of the list of live frames. > > I'm not sure this is the correct fix. If a frame is not yet in the > list of live frames exposed to Lisp, it might mean the frame is not > yet fully set up, and some code running off the dynamic-setting > machinery could similarly fail, right? > > Wouldn't it be better to delay the processing of this event until the > frame is fully set? There's no frame being created halfway in this scenario. Rather, a display connection is opened _without_ creating any frames, from which a dynamic-setting event subsequently arrives. Thanks.
bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
Full text available.Received: (at 67628) by debbugs.gnu.org; 6 Dec 2023 11:54:43 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Dec 06 06:54:43 2023 Received: from localhost ([127.0.0.1]:38967 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rAqUF-0006FV-EW for submit <at> debbugs.gnu.org; Wed, 06 Dec 2023 06:54:43 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:38592) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1rAqUE-0006FG-5Z for 67628 <at> debbugs.gnu.org; Wed, 06 Dec 2023 06:54:42 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1rAqTw-0007nz-LK; Wed, 06 Dec 2023 06:54:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=QtjO3xvCQS35LhFWUsvjE8/mKEK2DLQ4mscZ4MuamYY=; b=UHJFtKzwCxY2 erI00mih764bovMHAXaEJHb3xpsXMWtZ0iKVN7Ii3f6KlaFLaIsh+bZy6M5W0ptEByOwPElDDIO2R UiLusahNKAZPxNbLNxzVyCU5g8uaD2g73iyCW6Cq49C0wGF97upsszeAjIS0uIB6oCjvm7eBfccmg R47aFGjRqKn/MSviOIZypK1ZEWilpMDFRaXZsySHCVYWqKiwr6CU9cKzRxsRYicFew7Ugps0rcPk7 AC97FsDW90PM5+/yqycPEalUtqIO3fN5T6mdXg7J11tAjA4VQ7UtimNFqAup5D0RJL6P21gXnRTVw xr9T8zt8+4Lzh4JtZNcVKQ==; Date: Wed, 06 Dec 2023 13:54:29 +0200 Message-Id: <83sf4f4kcq.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Po Lu <luangruo@HIDDEN> In-Reply-To: <87edg0omfn.fsf@HIDDEN> (message from Po Lu on Tue, 05 Dec 2023 20:37:00 +0800) Subject: Re: bug#67628: Emacs 29.1: (x-open-connection (getenv "DISPLAY")) gets "Display :0.0 does not exist" error References: <20231204193138.3bb398b8@Elitebook> <83il5d683k.fsf@HIDDEN> <20231205004405.3fc7190e@Elitebook> <83a5qo6dce.fsf@HIDDEN> <87edg0omfn.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 67628 Cc: mahlamytsike@HIDDEN, 67628 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Po Lu <luangruo@HIDDEN> > Cc: Herman <mahlamytsike@HIDDEN>, 67628 <at> debbugs.gnu.org > Date: Tue, 05 Dec 2023 20:37:00 +0800 > > Eli Zaretskii <eliz@HIDDEN> writes: > > >> If in 29.1 now > >> $ emacs --daemon -Q > >> $ emacsclient -e "(setq debug-on-error t)" > >> then > >> $ emacsclient -e "(make-frame-on-display (getenv \"DISPLAY\"))" > >> does not give an error, i.e. the display is found > >> > >> but if > >> $ emacs --daemon -Q > >> $ emacsclient -e "(setq debug-on-error t)" > >> then > >> $ emacsclient -e "(x-open-connection (getenv \"DISPLAY\"))" > >> gives an error, i.e. the display does not exist. > > > > Po Lu, any ideas or suggestions? > > The display is opened successfully, but the next event to arrive > activates the dynamic-setting machinery that calls get-device-terminal, > which signals an error in response to there being no frames on that > display at the time. So you are saying that this is an issue with the fine timing of when the event arrives? And if it arrived a bit later, it would have been processed correctly? > The sound fix is for get-device-terminal to search for the device > provided within x_display_list instead of the list of live frames. I'm not sure this is the correct fix. If a frame is not yet in the list of live frames exposed to Lisp, it might mean the frame is not yet fully set up, and some code running off the dynamic-setting machinery could similarly fail, right? Wouldn't it be better to delay the processing of this event until the frame is fully set?
bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
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Hermes SMTP Server) with ESMTPA ID 1259ead04e09c548d26e85ec13b3ea04; Tue, 05 Dec 2023 12:37:09 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#67628: Emacs 29.1: (x-open-connection (getenv "DISPLAY")) gets "Display :0.0 does not exist" error In-Reply-To: <83a5qo6dce.fsf@HIDDEN> (Eli Zaretskii's message of "Tue, 05 Dec 2023 14:30:41 +0200") References: <20231204193138.3bb398b8@Elitebook> <83il5d683k.fsf@HIDDEN> <20231205004405.3fc7190e@Elitebook> <83a5qo6dce.fsf@HIDDEN> Date: Tue, 05 Dec 2023 20:37:00 +0800 Message-ID: <87edg0omfn.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.21943 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 2347 X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 67628 Cc: Herman <mahlamytsike@HIDDEN>, 67628 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: >> Date: Tue, 5 Dec 2023 00:44:05 +0200 >> From: Herman <mahlamytsike@HIDDEN> >> Cc: 67628 <at> debbugs.gnu.org >> >> On Mon, 04 Dec 2023 22:11:43 +0200 >> Eli Zaretskii <eliz@HIDDEN> wrote: >> >> > > Date: Mon, 4 Dec 2023 19:31:38 +0200 >> > > From: Herman <mahlamytsike@HIDDEN> >> > > >> > > 'x-create-frame' succeeds, but 'x-open-connection' fails with same >> > > display argument. >> > > >> > > This error "Display :0.0 does not exist" happens only, when >> > > variable 'debug-on-error' is non-nil. When 'debug-on-error' is nil, >> > > the error is not present. I.e. it works on the principle - you get >> > > what you are looking for. >> > >> > It could be that the code catches the error and proceeds, but your >> > setting debug-on-error non-nil prevents that. >> > >> > Why do you need to set debug-on-error in that case? >> >> At first I also thought that it is actually normal to catch an error when debug is enabled. I had debug turned on to look for other errors. >> >> One argument could be that in version 28.2 debug did not catch such an error when debug is enabled. Version 29.1 behaves differently. >> >> Another argument is that in the Elisp manual, in the Multiple >> terminals chapter, it is written that: "Normally, Emacs Lisp >> programs need not call 'x-open-connection' function, as >> 'make-frame-on-display' calls it automatically. The only reason for >> calling it is to check whether communication can be established with >> a given X display." >> If in 29.1 now >> $ emacs --daemon -Q >> $ emacsclient -e "(setq debug-on-error t)" >> then >> $ emacsclient -e "(make-frame-on-display (getenv \"DISPLAY\"))" >> does not give an error, i.e. the display is found >> >> but if >> $ emacs --daemon -Q >> $ emacsclient -e "(setq debug-on-error t)" >> then >> $ emacsclient -e "(x-open-connection (getenv \"DISPLAY\"))" >> gives an error, i.e. the display does not exist. > > Po Lu, any ideas or suggestions? The display is opened successfully, but the next event to arrive activates the dynamic-setting machinery that calls get-device-terminal, which signals an error in response to there being no frames on that display at the time. The sound fix is for get-device-terminal to search for the device provided within x_display_list instead of the list of live frames.
bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
Full text available.Received: (at 67628) by debbugs.gnu.org; 5 Dec 2023 12:31:24 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Dec 05 07:31:24 2023 Received: from localhost ([127.0.0.1]:36717 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rAUaB-00028p-P9 for submit <at> debbugs.gnu.org; Tue, 05 Dec 2023 07:31:24 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:53186) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1rAUa6-00028W-2D for 67628 <at> debbugs.gnu.org; Tue, 05 Dec 2023 07:31:22 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1rAUZp-0006QT-2H; Tue, 05 Dec 2023 07:31:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=dtwNjPhsr7yjc1UuvJfP7v2YJF5blv9T3YXQBMCS8ls=; b=i4hd57kwZaCc rQs59zzMTNgjqOlYbNVEsOhGJKu42nVsgjfNQEx9bAFnC9n6VvN7gRpZYmEc+QNaNx1F2o4QbeIBQ KwrX1Gk9NAKREwSNgIEF5eARufqmMoDF5f5aey1s09IiO5V9rOO4570CCKBXOZkz+2DZDMQMiUTll AQiT7bXo7fycdZ/oZUNhTlAOld/yy6W9Q7D7hN2mk1xC/cWiF+VisPSu24puztpCbLSQGOCEKkyd9 f0Rc//B8VO1Xf0iHv/U/7+b6cLtyToUULDjyN9Wg3nP8cpXYjlhQ7PrshRac9Ibd/5uxF0xRcfo2K x3XEEvCozVrBMHBW7w4fZA==; Date: Tue, 05 Dec 2023 14:30:41 +0200 Message-Id: <83a5qo6dce.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Herman <mahlamytsike@HIDDEN>, Po Lu <luangruo@HIDDEN> In-Reply-To: <20231205004405.3fc7190e@Elitebook> (message from Herman on Tue, 5 Dec 2023 00:44:05 +0200) Subject: Re: bug#67628: Emacs 29.1: (x-open-connection (getenv "DISPLAY")) gets "Display :0.0 does not exist" error References: <20231204193138.3bb398b8@Elitebook> <83il5d683k.fsf@HIDDEN> <20231205004405.3fc7190e@Elitebook> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 67628 Cc: 67628 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Tue, 5 Dec 2023 00:44:05 +0200 > From: Herman <mahlamytsike@HIDDEN> > Cc: 67628 <at> debbugs.gnu.org > > On Mon, 04 Dec 2023 22:11:43 +0200 > Eli Zaretskii <eliz@HIDDEN> wrote: > > > > Date: Mon, 4 Dec 2023 19:31:38 +0200 > > > From: Herman <mahlamytsike@HIDDEN> > > > > > > 'x-create-frame' succeeds, but 'x-open-connection' fails with same > > > display argument. > > > > > > This error "Display :0.0 does not exist" happens only, when > > > variable 'debug-on-error' is non-nil. When 'debug-on-error' is nil, > > > the error is not present. I.e. it works on the principle - you get > > > what you are looking for. > > > > It could be that the code catches the error and proceeds, but your > > setting debug-on-error non-nil prevents that. > > > > Why do you need to set debug-on-error in that case? > > At first I also thought that it is actually normal to catch an error when debug is enabled. I had debug turned on to look for other errors. > > One argument could be that in version 28.2 debug did not catch such an error when debug is enabled. Version 29.1 behaves differently. > > Another argument is that in the Elisp manual, in the Multiple terminals chapter, it is written that: "Normally, Emacs Lisp programs need not call 'x-open-connection' function, as 'make-frame-on-display' calls it automatically. The only reason for calling it is to check whether communication can be established with a given X display." > If in 29.1 now > $ emacs --daemon -Q > $ emacsclient -e "(setq debug-on-error t)" > then > $ emacsclient -e "(make-frame-on-display (getenv \"DISPLAY\"))" > does not give an error, i.e. the display is found > > but if > $ emacs --daemon -Q > $ emacsclient -e "(setq debug-on-error t)" > then > $ emacsclient -e "(x-open-connection (getenv \"DISPLAY\"))" > gives an error, i.e. the display does not exist. Po Lu, any ideas or suggestions?
bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
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When 'debug-on-error' is nil, > > the error is not present. I.e. it works on the principle - you get > > what you are looking for. > > It could be that the code catches the error and proceeds, but your > setting debug-on-error non-nil prevents that. > > Why do you need to set debug-on-error in that case? At first I also thought that it is actually normal to catch an error when debug is enabled. I had debug turned on to look for other errors. One argument could be that in version 28.2 debug did not catch such an error when debug is enabled. Version 29.1 behaves differently. Another argument is that in the Elisp manual, in the Multiple terminals chapter, it is written that: "Normally, Emacs Lisp programs need not call 'x-open-connection' function, as 'make-frame-on-display' calls it automatically. The only reason for calling it is to check whether communication can be established with a given X display." If in 29.1 now $ emacs --daemon -Q $ emacsclient -e "(setq debug-on-error t)" then $ emacsclient -e "(make-frame-on-display (getenv \"DISPLAY\"))" does not give an error, i.e. the display is found but if $ emacs --daemon -Q $ emacsclient -e "(setq debug-on-error t)" then $ emacsclient -e "(x-open-connection (getenv \"DISPLAY\"))" gives an error, i.e. the display does not exist.
bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
Full text available.Received: (at 67628) by debbugs.gnu.org; 4 Dec 2023 20:11:56 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Dec 04 15:11:56 2023 Received: from localhost ([127.0.0.1]:35823 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rAFIK-00018G-Bz for submit <at> debbugs.gnu.org; Mon, 04 Dec 2023 15:11:56 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:54348) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1rAFII-000183-Cl for 67628 <at> debbugs.gnu.org; Mon, 04 Dec 2023 15:11:54 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1rAFI2-0003sZ-9q; Mon, 04 Dec 2023 15:11:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=/Ku6QZL9dXuAJ8tKMF6ZLtXZG69qRmGOnb9lGVXMBTY=; b=CzYlsVi86R19 2N9tP1xvdhGDNrSGYtCmcPmPbVYxrf7KGq1Es1k+/pfzYozHuvIDAr0rVNo2EtlKNA3nYgoSFNzF0 chxDwZ97W/0d/knRgAs6c631S0JsxlckVJsO172PaYZ1uj5aWDjdSUEdgxIP4jTwywzRdtr4kYTVT Z8+pKbejTuHzGhRKBBtOrer+m5eyATq33A1FChVigPK16tEx4VWBVFxMmyg4QxXAAp8OCVHH7SNwS Z4rYmA0IN3iQVEog2vWQ+707di5+XJgxa6vTtJAHGR6wxsju2faxG7H2R0y762H9cCnKjyzRrpu5b tXoQMrmnpimH2u+Azup3Mg==; Date: Mon, 04 Dec 2023 22:11:43 +0200 Message-Id: <83il5d683k.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Herman <mahlamytsike@HIDDEN> In-Reply-To: <20231204193138.3bb398b8@Elitebook> (message from Herman on Mon, 4 Dec 2023 19:31:38 +0200) Subject: Re: bug#67628: Emacs 29.1: (x-open-connection (getenv "DISPLAY")) gets "Display :0.0 does not exist" error References: <20231204193138.3bb398b8@Elitebook> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 67628 Cc: 67628 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Mon, 4 Dec 2023 19:31:38 +0200 > From: Herman <mahlamytsike@HIDDEN> > > 'x-create-frame' succeeds, but 'x-open-connection' fails with same display argument. > > This error "Display :0.0 does not exist" happens only, when variable 'debug-on-error' is non-nil. When 'debug-on-error' is nil, the error is not present. I.e. it works on the principle - you get what you are looking for. It could be that the code catches the error and proceeds, but your setting debug-on-error non-nil prevents that. Why do you need to set debug-on-error in that case?
bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
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Hi !
'x-create-frame' succeeds, but 'x-open-connection' fails with same display argument.
This error "Display :0.0 does not exist" happens only, when variable 'debug-on-error' is non-nil. When 'debug-on-error' is nil, the error is not present. I.e. it works on the principle - you get what you are looking for.
Tested also on Emacs 28.2 and there error is not present regardless of the value of the variable 'debug-on-error'.
xfwm4 4.18.0
xorg-server 21.1.9
Emacs 29.1
Archlinux
How to reproduce:
#################
$ emacs --fg-daemon -Q
...
Starting Emacs daemon.
$ emacsclient --eval "(setq debug-on-error t)"
t
$ emacsclient --eval "(x-open-connection (getenv \"DISPLAY\"))"
nil
...
Debugger entered--Lisp error: (error "Display :0.0 does not exist")
signal(error ("Display :0.0 does not exist"))
error("Display %s does not exist" ":0.0")
get-device-terminal(":0.0")
frames-on-display-list(":0.0")
font-setting-change-default-font(":0.0" nil)
dynamic-setting-handle-config-changed-event((config-changed-event font-render ":0.0"))
funcall-interactively(dynamic-setting-handle-config-changed-event (config-changed-event font-render ":0.0"))
call-interactively(dynamic-setting-handle-config-changed-event nil [(config-changed-event font-render ":0.0")])
command-execute(dynamic-setting-handle-config-changed-event nil [(config-changed-event font-render ":0.0")] t)
The full testing:
#################
$ emacs --fg-daemon -Q
...
Starting Emacs daemon.
$ emacsclient --eval "(setq debug-on-error t)"
t
$ emacsclient --eval "debug-ignored-errors"
(beginning-of-line beginning-of-buffer end-of-line end-of-buffer end-of-file buffer-read-only file-supersession mark-inactive user-error)
$ emacsclient --eval "debug-on-signal"
nil
$ emacsclient --eval "debug-on-event"
sigusr2
$ emacsclient --eval "(terminal-list)"
(#<terminal 0 on initial_terminal>)
$ emacsclient --eval "(get-device-terminal nil)"
#<terminal 0 on initial_terminal>
$ emacsclient --eval "(x-display-list)"
nil
$ emacsclient --eval "(x-open-connection (getenv \"DISPLAY\"))"
nil
...
Debugger entered--Lisp error: (error "Display :0.0 does not exist")
signal(error ("Display :0.0 does not exist"))
error("Display %s does not exist" ":0.0")
get-device-terminal(":0.0")
frames-on-display-list(":0.0")
font-setting-change-default-font(":0.0" nil)
dynamic-setting-handle-config-changed-event((config-changed-event font-render ":0.0"))
funcall-interactively(dynamic-setting-handle-config-changed-event (config-changed-event font-render ":0.0"))
call-interactively(dynamic-setting-handle-config-changed-event nil [(config-changed-event font-render ":0.0")])
command-execute(dynamic-setting-handle-config-changed-event nil [(config-changed-event font-render ":0.0")] t)
$ emacs --fg-daemon -Q
...
Starting Emacs daemon.
$ emacsclient --eval "(setq debug-on-error t)"
t
$ emacsclient --eval "(x-create-frame \`((display . ,(getenv \"DISPLAY\"))))"
#<frame *scratch* - GNU Emacs at Elitebook 0x55f5f31eeba0>
$ emacsclient --eval "(terminal-list)"
(#<terminal 0 on initial_terminal> #<terminal 1 on :0.0>)
$ emacsclient --eval "(get-device-terminal nil)"
#<terminal 1 on :0.0>
$ emacsclient --eval "(x-display-list)"
(":0.0")
$ emacsclient --eval "(kill-emacs)"
$ emacs --fg-daemon -Q
...
Starting Emacs daemon.
$ emacsclient --eval "(x-open-connection (getenv \"DISPLAY\"))"
nil
$ emacsclient --eval "(x-display-list)"
(":0.0")
$ emacsclient --eval "(terminal-list)"
(#<terminal 0 on initial_terminal> #<terminal 1 on :0.0>)
$ emacsclient --eval "(get-device-terminal nil)"
#<terminal 0 on initial_terminal>
Herman <mahlamytsike@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#67628; Package emacs.
Full text available.
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