Bug#1142262: xterm: intermittent glitches

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On Fri, Jul 17, 2026 at 12:48:06AM +0200, Allan Wind wrote:
> Package: xterm
> Version: 398-1
> Severity: normal
>=20
> Dear Maintainer,
>=20
> Sorry, this is probably a terrible bug report, but I figured that I=20
> should let you know that I have had intermittent glitches with xterm
> for a while now.  It forces me to use a different x-terminal-emulator,=20
> as I can't trust what is on the screen.  Feel free to reject the bug=20
> report if it provides no value. Happy to provide any additional debug=20
> info.  I reviewed both 463784 and 1014625 but I can't tell if it's the=20
> same issue.  It seems scroll related.
>=20
> I observe the issue most often when I try to compose a message with mutt=
=20
> + nvim, and when I press enter, the following line is duplicated each=20
> time. The glitches are cleared on the screen with ctrl-l but the issue=20
> persist.  I have also seen it with nvim editing a text file.  I have=20
> eliminated mutt, nvim, and tmux.  I have seen it with both vim and nvim.
> I also seen it a strange scroll behavior half way down the screen.

The description seems familiar, as if I'd fixed this, but reading my
change notes, don't see something to associate it.  So I don't know.

> If I open a 2nd xterm when I see the issue, it too, will exhibit the=20
> same issue, as will closing and retrying.  Then I installed alacritty,=20
> and when I started it, the glitches in xterm disappeared.
>=20
> I have been on the same hardware for years, NVIDIA Corporation GM206GLM=
=20
> [Quadro M2200 Mobile], and been tracking the stable driver.
>=20
>=20
> /Allan
>=20
> *** Reporter, please consider answering these questions, where appropriat=
e ***
>=20
>    * What led up to the situation?
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
>    * What was the outcome of this action?
>    * What outcome did you expect instead?
>=20
> *** End of the template - remove these template lines ***
>=20
>=20
> -- System Information:
> Debian Release: 13.6
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 's=
table')
> Architecture: amd64 (x86_64)
>=20
> Kernel: Linux 6.12.90+deb13.1-amd64 (SMP w/8 CPU threads; PREEMPT)
> Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNS=
IGNED_MODULE
> Locale: LANG=3Den_US.UTF-8, LC_CTYPE=3Den_US.UTF-8 (charmap=3DUTF-8), LAN=
GUAGE not set
> Shell: /bin/sh linked to /usr/bin/dash
> Init: systemd (via /run/systemd/system)
> LSM: AppArmor: enabled
>=20
> Versions of packages xterm depends on:
> ii  libc6           2.41-12+deb13u3
> ii  libfontconfig1  2.15.0-2.3
> ii  libfreetype6    2.13.3+dfsg-1+deb13u1
> ii  libice6         2:1.1.1-1
> ii  libtinfo6       6.5+20250216-2
> ii  libutempter0    1.2.1-4
> ii  libx11-6        2:1.8.12-1
> ii  libxaw7         2:1.0.16-1
> ii  libxext6        2:1.3.4-1+b3
> ii  libxft2         2.3.6-1+b4
> ii  libxinerama1    2:1.1.4-3+b4
> ii  libxmu6         2:1.1.3-3+b4
> ii  libxpm4         1:3.5.17-1+deb13u1
> ii  libxt6t64       1:1.2.1-1.2+b2
> ii  xbitmaps        1.1.1-2.2
>=20
> Versions of packages xterm recommends:
> ii  luit [luit]  2.0.20240910-1
> ii  x11-utils    7.7+7
>=20
> Versions of packages xterm suggests:
> pn  xfonts-cyrillic  <none>
>=20
> -- no debconf information
>=20
> --=20
> Yaxto ApS - Runs Your Business
> Sommerlyst 12, 6630 R=F8dding, Denmark
> CVR nr: 46415604
>=20

--=20
Thomas E. Dickey <[email protected]>
https://invisible-island.net

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