Debian Bug report logs - #814959
Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: James Lu <bitflip3@gmail.com>

To: submit@bugs.debian.org

Subject: Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

Date: Tue, 16 Feb 2016 21:12:42 -0800

[Message part 1 (text/plain, inline)]

Source: qtbase-opensource-src
Version: 5.3.2+dfsg-4+deb8u1
Severity: important
Justification: makes keyboard usage impossible in apps using Qt5

Dear maintainers,

Using Openbox via TightVNC on a Debian Jessie server, I've been running
into a strange issue where the keyboard mapping in Qt5 apps is all
wrong. For example, "asdf" on a US keyboard gets mapped to "abfh", and
"qwerty" comes out as "c.gvn".

I've looked online to find solutions or workarounds, and found only some
similar issues and no real fix. Searching "asdf abfh vnc" brought me to
https://bbs.archlinux.org/viewtopic.php?id=81427, though that only shows
a workaround for GNOME.
Other sources point to missing XKEYBOARD extension in VNC
implementations as a cause for breakage, though the workaround with
XKB_DEFAULT_RULES=base hasn't worked for me:
https://bugreports.qt.io/browse/QTBUG-44938

Strangely enough, this only affects apps using Qt5 (Qt designer,
Transmission-qt, various PyQt5 programs). In programs using GTK2/3 or
Qt4 (qtconfig, VLC), I can type just fine.

For reference, my installed tightvncserver version is 1.3.9-6.5, and my
client is running Windows 7 with the TightVNC Java client, version 2.7.2.

Best,
James

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Message #10 received at 814959@bugs.debian.org (full text, mbox, reply):

From: Lisandro Damián Nicanor Pérez Meyer <perezmeyer@gmail.com>

To: 814959@bugs.debian.org

Cc: 814959-submitter@bugs.debian.org

Subject: Re: Bug#814959: Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

Date: Wed, 17 Feb 2016 07:41:39 -0300

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Control: tag -1 moreinfo

Can you test if it also happens with testing's qt5? If it doesn't I can
submit a bug upstream, if it does work we would need to isolate the patches
that fixed that.

-- 
Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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Message #20 received at 814959@bugs.debian.org (full text, mbox, reply):

From: James Lu <bitflip3@gmail.com>

To: Lisandro Damián Nicanor Pérez Meyer <perezmeyer@gmail.com>, 814959@bugs.debian.org

Subject: Re: Bug#814959: Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

Date: Wed, 17 Feb 2016 20:10:15 -0800

[Message part 1 (text/plain, inline)]

Hi,

I can reproduce this with both the versions of Qt 5 in testing and
unstable (libqt5gui5 versions 5.5.1+dfsg-13 and 5.5.1+dfsg-14
respectively). tightvncserver has version 1.3.9-7 on this installation
of testing.

Best,
James

On 17/02/2016 2:41 AM, Lisandro Damián Nicanor Pérez Meyer wrote:
> Control: tag -1 moreinfo
> 
> Can you test if it also happens with testing's qt5? If it doesn't I can
> submit a bug upstream, if it does work we would need to isolate the
> patches that fixed that.
> 
> -- 
> Lisandro Damián Nicanor Pérez Meyer
> http://perezmeyer.com.ar/
> http://perezmeyer.blogspot.com/
> 

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Message #27 received at 814959@bugs.debian.org (full text, mbox, reply):

From: Linus Lüssing <linus.luessing@c0d3.blue>

To: 814959@bugs.debian.org

Subject: Re: Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

Date: Thu, 20 Oct 2016 01:59:01 +0200

I stumbled over this issue with various Qt5 applications on Debian
Sid, too, and had initially reported my issue here:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=818232

Switching the VNC viewer does not seem to help, I tried
xtightvncviewer and krdc.

Not only the TightVNC server, but also the RealVNC one
(vnc4server package) seem to be affected. TigerVNC on the other
hand works like a charm (which is my current workaround for this
issue for now).

Noticeably, on TightVNC and RealVNC, I get this error message,
while on TigerVNC I don't:

"Qt: XKEYBOARD extension not present on the X server."

So looks like James initial investigations lead to the right
direction.

Unfortunately, this report on the Qt bugtracker indicates that it
was closed and deemed "out of scope" and that VNC servers should
implement this XKEYBOARD extension :-( :

https://bugreports.qt.io/browse/QTBUG-44938

This ticket also has some nice explanations why Qt5 has this issue
and Qt4 doesn't (e.g. the preference of libxkbcommon over xlib in
Qt5).

Regards, Linus

Message #32 received at 814959@bugs.debian.org (full text, mbox, reply):

From: "Lisandro Damián Nicanor Pérez Meyer" <perezmeyer@gmail.com>

To: 814959@bugs.debian.org, 818232@bugs.debian.org, control@bugs.debian.org, 814959-submitter@bugs.debian.org, 818232-submitter@bugs.debian.org

Subject: Re: Bug#814959: Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

Date: Fri, 21 Oct 2016 08:43:23 -0300

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forcemerge 814959 818232
forwarded 814959 https://bugreports.qt.io/browse/QTBUG-44938
tag 814959 wontfix
thanks

On jueves, 20 de octubre de 2016 1:59:01 A. M. ART Linus Lüssing wrote:
[snip] 
> Noticeably, on TightVNC and RealVNC, I get this error message,
> while on TigerVNC I don't:
> 
> "Qt: XKEYBOARD extension not present on the X server."
> 
> So looks like James initial investigations lead to the right
> direction.
> 
> Unfortunately, this report on the Qt bugtracker indicates that it
> was closed and deemed "out of scope" and that VNC servers should
> implement this XKEYBOARD extension :-( :
> 
> https://bugreports.qt.io/browse/QTBUG-44938
> 
> This ticket also has some nice explanations why Qt5 has this issue
> and Qt4 doesn't (e.g. the preference of libxkbcommon over xlib in
> Qt5).

So I'm afraid this is not a Qt5 bug, but lack of proper support for XKEYBOARD 
(and thus Qt5 apps) in VNC servers/clients.

I'm marking this as wontfix because it will never get "fixed" from the Qt 
side. I suggest you to open the proper bugs to your VNC servers/clients.

Kinds regards, Lisandro.

-- 
Lo que me sorprende de las mujeres es que se arrancan los pelos desde
la raíz con cera caliente y aún así le temen a las arañas.
  Jerry Seinfeld

lis: comentario sobre tu frase....
yo soy mujer, yo me arranco los pelos y VOS le tenes miedo a las arañas....
  María Luján Pérez Meyer (mi hermana)

Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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Message #44 received at 814959@bugs.debian.org (full text, mbox, reply):

From: Maximiliano Curia <maxy@debian.org>

To: 814959@bugs.debian.org

Subject: Re: Bug#814959: Keyboard mapping broken with Qt5 apps in TightVNC, possibly due to missing XKEYBOARD extension

Date: Fri, 21 Oct 2016 13:57:49 +0200

[Message part 1 (text/plain, inline)]

¡Hola!

El 2016-10-21 a las 08:43 -0300, Lisandro Damián Nicanor Pérez Meyer escribió:
> So I'm afraid this is not a Qt5 bug, but lack of proper support for XKEYBOARD 
> (and thus Qt5 apps) in VNC servers/clients.

Aparentely turbovnc [1], (which started as a tightvnc fork) has added the 
missing RANDR and XKEYBOARD extensions.

Disclaimer: this is not packaged, I haven't tested it, nor I've checked it's 
openness. But if anyone has the time to work on this, please consider 
retitling #700517.

[1]: https://sourceforge.net/projects/turbovnc/

Happy hacking,
-- 
"There are only two things wrong with C++: The initial concept and the
implementation."
-- Bertrand Meyer
Saludos /\/\ /\ >< `/

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Message #47 received at 814959-submitter@bugs.debian.org (full text, mbox, reply):

From: perezmeyer@gmail.com

To: 814959-submitter@bugs.debian.org

Subject: Bug #814959 in qtbase-opensource-src marked as pending

Date: Fri, 16 Mar 2018 13:16:54 +0000

Control: tag -1 pending

Hello,

Bug #814959 in qtbase-opensource-src reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below, and you can check the diff of the fix at:

https://salsa.debian.org/qt-kde-team/qt/qtbase/commit/fc885340da285c4d1b059db7e8084fd65300b57d

------------------------------------------------------------------------
Backport support_legacy_x11_keymaps.patch (Closes: #814959).

------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/814959

Message #54 received at 814959-close@bugs.debian.org (full text, mbox, reply):

From: Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>

To: 814959-close@bugs.debian.org

Subject: Bug#814959: fixed in qtbase-opensource-src 5.10.1+dfsg-3

Date: Sat, 17 Mar 2018 16:36:03 +0000

Source: qtbase-opensource-src
Source-Version: 5.10.1+dfsg-3

We believe that the bug you reported is fixed in the latest version of
qtbase-opensource-src, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 814959@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org> (supplier of updated qtbase-opensource-src package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


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Hash: SHA256

Format: 1.8
Date: Sat, 17 Mar 2018 13:14:47 -0300
Source: qtbase-opensource-src
Binary: libqt5core5a libqt5gui5 qt5-gtk-platformtheme libqt5network5 libqt5opengl5 libqt5sql5 libqt5sql5-mysql libqt5sql5-odbc libqt5sql5-psql libqt5sql5-sqlite libqt5sql5-tds libqt5sql5-ibase libqt5xml5 libqt5dbus5 libqt5test5 libqt5concurrent5 libqt5widgets5 libqt5printsupport5 qtbase5-dev qtbase5-private-dev libqt5opengl5-dev qtbase5-dev-tools qt5-qmake-bin qt5-qmake qtbase5-examples qt5-default qtbase5-doc qtbase5-doc-html
Architecture: source
Version: 5.10.1+dfsg-3
Distribution: experimental
Urgency: medium
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Changed-By: Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>
Description:
 libqt5concurrent5 - Qt 5 concurrent module
 libqt5core5a - Qt 5 core module
 libqt5dbus5 - Qt 5 D-Bus module
 libqt5gui5 - Qt 5 GUI module
 libqt5network5 - Qt 5 network module
 libqt5opengl5 - Qt 5 OpenGL module
 libqt5opengl5-dev - Qt 5 OpenGL library development files
 libqt5printsupport5 - Qt 5 print support module
 libqt5sql5 - Qt 5 SQL module
 libqt5sql5-ibase - Qt 5 Firebird database driver
 libqt5sql5-mysql - Qt 5 MySQL database driver
 libqt5sql5-odbc - Qt 5 ODBC database driver
 libqt5sql5-psql - Qt 5 PostgreSQL database driver
 libqt5sql5-sqlite - Qt 5 SQLite 3 database driver
 libqt5sql5-tds - Qt 5 FreeTDS database driver
 libqt5test5 - Qt 5 test module
 libqt5widgets5 - Qt 5 widgets module
 libqt5xml5 - Qt 5 XML module
 qt5-default - Qt 5 development defaults package
 qt5-gtk-platformtheme - Qt 5 GTK+ 3 platform theme
 qt5-qmake  - Qt 5 qmake Makefile generator tool
 qt5-qmake-bin - Qt 5 qmake Makefile generator tool — binary file
 qtbase5-dev - Qt 5 base development files
 qtbase5-dev-tools - Qt 5 base development programs
 qtbase5-doc - Qt 5 base documentation
 qtbase5-doc-html - Qt 5 base HTML documentation
 qtbase5-examples - Qt 5 base examples
 qtbase5-private-dev - Qt 5 base private development files
Closes: 814959 818232
Changes:
 qtbase-opensource-src (5.10.1+dfsg-3) experimental; urgency=medium
 .
   [ Dmitry Shachnev ]
   * Update list of Qt WebKit build-dependencies in debian/README.source.
 .
   [ Lisandro Damián Nicanor Pérez Meyer ]
   * Backport support_legacy_x11_keymaps.patch (Closes: #814959, #818232).
   * Update symbols files with buildds' logs.
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 43782f1a8d8246a0714b7515c0d3a64c97fd32d5 229608 qtbase-opensource-src_5.10.1+dfsg-3.debian.tar.xz
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Files:
 0533c133f8d7870276f641d5d8d84a96 5061 libs optional qtbase-opensource-src_5.10.1+dfsg-3.dsc
 55f0059069b051d36d5c48c0a551dca6 229608 libs optional qtbase-opensource-src_5.10.1+dfsg-3.debian.tar.xz
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Message #61 received at 814959-submitter@bugs.debian.org (full text, mbox, reply):

From: perezmeyer@gmail.com

To: 814959-submitter@bugs.debian.org

Subject: Bug #814959 in qtbase-opensource-src marked as pending

Date: Tue, 17 Apr 2018 21:42:41 +0000

Control: tag -1 pending

Hello,

Bug #814959 in qtbase-opensource-src reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below, and you can check the diff of the fix at:

https://salsa.debian.org/qt-kde-team/qt/qtbase/commit/0873cdce0f38536a8e0d0e3c424b62cd3ab0db0a

------------------------------------------------------------------------
Backport support_legacy_x11_keymaps.patch (Closes: #814959).

------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/814959

Message #66 received at 814959-submitter@bugs.debian.org (full text, mbox, reply):

From: tsimonq2@ubuntu.com

To: 814959-submitter@bugs.debian.org

Subject: Bug #814959 in qtbase-opensource-src marked as pending

Date: Tue, 17 Apr 2018 21:42:42 +0000

Control: tag -1 pending

Hello,

Bug #814959 in qtbase-opensource-src reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below, and you can check the diff of the fix at:

https://salsa.debian.org/qt-kde-team/qt/qtbase/commit/ae30dffeb377286385c3622651489d634d9e8de5

------------------------------------------------------------------------
Revert "Backport support_legacy_x11_keymaps.patch (Closes: #814959)."

This reverts commit 0873cdce0f38536a8e0d0e3c424b62cd3ab0db0a.

I didn't look at the full history before cherry-picking.

------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/814959

Message #71 received at 814959@bugs.debian.org (full text, mbox, reply):

From: Lisandro Damián Nicanor Pérez Meyer <perezmeyer@gmail.com>

To: 814959@bugs.debian.org

Subject: Not pending

Date: Wed, 18 Apr 2018 13:35:45 -0300

Control: tag -1 -pending

A revert should not mark a bug as pending.

-- 
Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

Message #78 received at 814959-submitter@bugs.debian.org (full text, mbox, reply):

From: Simon Quigley <tsimonq2@ubuntu.com>

To: 814959-submitter@bugs.debian.org

Subject: Bug #814959 in qtbase-opensource-src marked as pending

Date: Sat, 03 Nov 2018 19:55:13 +0000

Control: tag -1 pending

Hello,

Bug #814959 in qtbase-opensource-src reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below, and you can check the diff of the fix at:

https://salsa.debian.org/qt-kde-team/qt/qtbase/commit/ae30dffeb377286385c3622651489d634d9e8de5

------------------------------------------------------------------------
Revert "Backport support_legacy_x11_keymaps.patch (Closes: #814959)."

This reverts commit 0873cdce0f38536a8e0d0e3c424b62cd3ab0db0a.

I didn't look at the full history before cherry-picking.

------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/814959

Message #85 received at 814959-close@bugs.debian.org (full text, mbox, reply):

From: Dmitry Shachnev <mitya57@debian.org>

To: 814959-close@bugs.debian.org, 818232-close@bugs.debian.org

Subject: Re: Not fixable until 5.11

Date: Fri, 26 Apr 2019 11:32:58 +0300

[Message part 1 (text/plain, inline)]

Version: 5.11.0~rc1+dfsg-1

On Sat, Mar 17, 2018 at 03:35:56PM -0300, Lisandro Damián Nicanor Pérez Meyer wrote:
> reopen 814959
> reopen 818232
> thanks
>
> As shown by qtbase 5.10.1+dfsg-3 the patch is not straightforward, so
> I'm reopening the bugs which should be closed in 5.11.

We have Qt 5.11 for a while now (which includes the fix [1]), so I am
closing these bugs back.

[1]: https://code.qt.io/cgit/qt/qtbase.git/commit/?id=3edcd9420e3ad661

--
Dmitry Shachnev

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