From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#57434: 28.1.91; Terminal Emacs Mac OS flickering. Date: Tue, 30 Aug 2022 14:10:10 +0300 Message-ID: <83wnaqugvh.fsf@gnu.org> References: <83edx1znjl.fsf@gnu.org> <83czclzms4.fsf@gnu.org> <83ler7vx3o.fsf@gnu.org> <838rn6x4h2.fsf@gnu.org> <834jxux3kd.fsf@gnu.org> <831qsyx2lr.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12696"; mail-complaints-to="usenet@ciao.gmane.io" Cc: kuragin@google.com, 57434@debbugs.gnu.org To: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 30 13:10:23 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oSz8P-00039Q-OC for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 30 Aug 2022 13:10:22 +0200 Original-Received: from localhost ([::1]:38102 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oSz8O-0000zT-Ft for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 30 Aug 2022 07:10:20 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44030) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSz86-0000yK-El for bug-gnu-emacs@gnu.org; Tue, 30 Aug 2022 07:10:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:45163) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oSz86-0003yD-4k for bug-gnu-emacs@gnu.org; Tue, 30 Aug 2022 07:10:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oSz85-0006xq-Ll for bug-gnu-emacs@gnu.org; Tue, 30 Aug 2022 07:10:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 30 Aug 2022 11:10:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 57434 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 57434-submit@debbugs.gnu.org id=B57434.166185779326751 (code B ref 57434); Tue, 30 Aug 2022 11:10:01 +0000 Original-Received: (at 57434) by debbugs.gnu.org; 30 Aug 2022 11:09:53 +0000 Original-Received: from localhost ([127.0.0.1]:34912 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oSz7w-0006xP-J9 for submit@debbugs.gnu.org; Tue, 30 Aug 2022 07:09:53 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:44406) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oSz7u-0006xG-LG for 57434@debbugs.gnu.org; Tue, 30 Aug 2022 07:09:51 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:40418) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSz7s-0003n7-UB; Tue, 30 Aug 2022 07:09:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=h/nOViJA1e36VCDvDexSEEmC3gtt/Fvf390AB7H0HUY=; b=dkmwrtZoT1LoTytl3p66 w74caC3FbidiC0z/E4e8QSXRQVYGWe9vtPfJbP2xzNuDdOOt1S0Are5rcMVs8/mHJjMqAcJt1eMhT fP1pTmggX/EJFD1D8CxO3KfFfawqImNsKLiyQLsOP0hq89l9zweWPEWyK+7WBkmz1eWCO8+KLfogz UGaBtTsQrrrrdEs+6MaoM/Cea6Q/2vk1yJf4WtlSBZ05nHno0NQM2m/raXVj5rTz9zYKzS2feuuLS qpH+uiqb7syLqxnpIPhicB8gXHzEibFyxgcbyZu6nRs41cR6DZRGxZZRym+HxQQJWlXEzoWrzLuc8 ekunUHtD10Nzyw==; Original-Received: from [87.69.77.57] (port=4984 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSz7s-0008Gs-DA; Tue, 30 Aug 2022 07:09:48 -0400 In-Reply-To: (message from Gerd =?UTF-8?Q?M=C3=B6llmann?= on Tue, 30 Aug 2022 08:09:33 +0200) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:241106 Archived-At: > From: Gerd Möllmann > Cc: Eli Zaretskii , 57434@debbugs.gnu.org > Date: Tue, 30 Aug 2022 08:09:33 +0200 > > Dmitrii Kuragin writes: > > > So far: > > ``` > > :~/Desktop% tput al; echo $? > > 0 > > :~/Desktop% tput AL; echo $? > > 1%dL0 > > :~/Desktop% tput dl; echo $? > > 0 > > :~/Desktop% tput DL; echo $? > > 1%dM0 > > :~/Desktop% tput sf; echo $? > > > > 0 > > 0~/Desktop% tput sr; echo $? > > :~/Desktop% tput wi; echo $? > > tput: unknown terminfo capability 'wi' > > 4 > > :~/Desktop% tput cs; echo $? > > %p1%d;%p2%dr0 > > :~/Desktop% tput cS; echo $? > > tput: unknown terminfo capability 'cS' > > 4 > > ``` > > Same here. Thanks. But I'm quite confused by all of this, because you don't show all the relevant capabilities, AFAICT. We have in term.c: tty->scroll_region_ok = (tty->Wcm->cm_abs && (tty->TS_set_window || tty->TS_set_scroll_region || tty->TS_set_scroll_region_1)); tty->line_ins_del_ok = (((tty->TS_ins_line || tty->TS_ins_multi_lines) && (tty->TS_del_line || tty->TS_del_multi_lines)) || (tty->scroll_region_ok && tty->TS_fwd_scroll && tty->TS_rev_scroll)); Please try all of the relevant capabilities and tell me which ones are supported and which aren't. (Please also mention both the capability string and its term.c flag name, so that I shouldn't need to jump back-and-forth in the source looking up each one to understand what it means.) Then we have in dispnew.c: /* If we cannot insert/delete lines, it's no use trying it. */ if (!FRAME_LINE_INS_DEL_OK (f)) inhibit_id_p = 1; [...] /* Try doing i/d line, if not yet inhibited. */ if (!inhibit_id_p && i < desired_matrix->nrows) force_p |= scrolling (f); Which means that 'scrolling', and thus 'scrolling_1' (where the problem happens) will not be called if the line_ins_del_ok flag is not set. Furthermore, we have in scrolling_1: if (FRAME_SCROLL_REGION_OK (frame)) { calculate_direct_scrolling (frame, matrix, window_size, unchanged_at_bottom, draw_cost, old_draw_cost, old_hash, new_hash, free_at_end); do_direct_scrolling (frame, frame->current_matrix, matrix, window_size, unchanged_at_top); } else { calculate_scrolling (frame, matrix, window_size, unchanged_at_bottom, draw_cost, old_hash, new_hash, free_at_end); do_scrolling (frame, frame->current_matrix, matrix, window_size, unchanged_at_top); } which means do_direct_scrolling (which causes the problem) will not be called if the terminal's scroll_region_ok flag is not set. So given all of this, can you tell whether Emacs does TRT here? That is: . are all the capabilities that are supposed to be available for these two flags are indeed available? . do we need to check any additional capabilities, which are in fact used in the problematic scenario, but not tested as part of setting these two flags? Assuming that Emacs does TRT, i.e. sets the flags correctly and uses only the capabilities that are conditions for the flags set, then the next important question is: why doesn't Gerd see the flickering on a very similar system and the same terminal emulator? Is it possible that some other local software configuration on Dmitrii's machine causes this, directly or indirectly? E.g., Dmitrii, do you have some display-related software/driver that has some "optimization" features turned on? If so, can you turn them off and try again? Thanks.