From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Fabrice Popineau Newsgroups: gmane.emacs.bugs Subject: bug#39188: 28.0.50; w32 cursor redisplay problem Date: Sun, 19 Jan 2020 16:39:56 +0100 Message-ID: References: <835zh7zd1k.fsf@gnu.org> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="00000000000097a6c7059c7ffdd3" Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="5303"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 39188@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jan 19 16:41:12 2020 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 1itChL-0001KQ-Fv for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 19 Jan 2020 16:41:11 +0100 Original-Received: from localhost ([::1]:51052 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1itChK-0002a8-HQ for geb-bug-gnu-emacs@m.gmane-mx.org; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable Le dim. 19 janv. 2020 =C3=A0 16:22, Eli Zaretskii a =C3=A9cr= it : > > From: Fabrice Popineau > > Date: Sun, 19 Jan 2020 10:17:01 +0100 > > > > With the current master (and for a couple of months), I observe this > redisplay problem where moving the > > cursor up or down, when the buffer is scrolled, the cursor may leave > some ghost trace. This is with > > w32-use-visible-system-caret set to t. It seems the problem does not > happen if this variable is set to nil. > > Please show a reproduction recipe starting from "emacs -Q". Your > image seems to show a trace on every line, which is not what I see > here. What I see here is 2 artefacts: one in the middle of the > window, another at its beginning, and this problem seems to have > started with Emacs 25.1, not a few months ago. > >From what I tried, it is not completely deterministic (or it depends on many parameters). Best bet to reproduce the problem: visit some long org file like or-manual.org from the org distribution, with 'emacs -Q', use C-S-tab 3 times to expand all headings and run sequences of C-n and C-p to force scrolling of the buffer. You should see those artefacts at some point. Fabrice --00000000000097a6c7059c7ffdd3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
Le=C2=A0dim. 19 janv. 2020 =C3=A0=C2= =A016:22, Eli Zaretskii <eliz@gnu.org> a =C3=A9crit=C2=A0:
> From: Fabrice Popineau <fabrice.popineau@gmail.com>
> Date: Sun, 19 Jan 2020 10:17:01 +0100
>
> With the current master (and for a couple of months), I observe this r= edisplay problem where moving the
> cursor up or down, when the buffer is scrolled, the cursor may leave s= ome ghost trace. This is with
> w32-use-visible-system-caret set to t. It seems the problem does not h= appen if this variable is set to nil.

Please show a reproduction recipe starting from "emacs -Q".=C2=A0= Your
image seems to show a trace on every line, which is not what I see
here.=C2=A0 What I see here is 2 artefacts: one in the middle of the
window, another at its beginning, and this problem seems to have
started with Emacs 25.1, not a few months ago.

From what I tried, it is not completely deterministic (or it depend= s on many parameters).
Best bet to reproduce the problem: visit s= ome long org file like or-manual.org f= rom the org distribution,
with 'emacs -Q',
use C-S-tab 3 times to expand all headings=C2=A0
and run sequence= s of C-n and C-p to force scrolling of the buffer.=C2=A0
You shou= ld see those artefacts at some point.

Fabrice

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