FWIW I have tried the /configs/sim/axis/qtvcp/qtvcp_tabs sample on a 64bit Pi4 
and it works.
raspberrypi:~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 11 (bullseye)
Release:        11
Codename:       bullseye

raspberrypi:~ $ uname -a
Linux raspberrypi 5.15.27-rt35-v8+ #1 SMP PREEMPT_RT Fri Mar 11 16:34:20 GMT 
2022 aarch64 GNU/Linux

I got rid of the python3-gst1.0 installed? with:
sudo apt-install python3-gst-1.0

There are a lot of these errors on closing but it seems to have no ill effect.:
qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 3320, 
resource id: 33554438, major code: 130 (Unknown), minor code: 3

I got rid of them with:
export QT_LOGGING_RULES='qt.qpa.*=false'


> On 5 Sep 2022, at 11:37 am, Chris Morley <chrisinnana...@hotmail.com> wrote:
> 
> Hi Gene.
> I actually see no apparent show stoppers.
> The Desktop Notify error is weird but seems to not stop anything.
> It just seems not to embed.
> 
> 
> Could your try the sim sim/axis/qtvcp/qtvcp_tabs sample.
> 
> It should embed a cam window too.
> also is the new tab window completely plain or is there text?
> 
> Chris
> 
> ________________________________
> From: gene heskett <ghesk...@shentel.net>
> Sent: September 5, 2022 1:21 AM
> To: EMC developers <emc-developers@lists.sourceforge.net>
> Subject: [Emc-developers] cam align
> 
> Gretibgs all;
> 
> I se some debugging has been turned on so it not a showstopper on my g0704.
> 
> The camera tab is created, but empty.
> 
> The terminal its launched from now contains some debugging info that may
> be useful:
> 
> halcmd loadusr -Wn qtvcp_embed qtvcp -d -c qtvcp_embed -x {XID} cam_align
> [False]
> Waiting for component 'qtvcp_embed' to become
> ready........................................................................................................................................................................................................................................[QTvcp.QTVCP.LIB.SYS_NOTIFY][WARNING]
> Desktop Notify not available:: org.freedesktop.DBus.Error.NoReply: Did
> not receive a reply. Possible causes include: the remote application did
> not send a reply, the message bus security policy blocked the reply, the
> reply timeout expired, or the network connection was broken.
> (sys_notify.py:71)
> Namespace Gst not available
> [QTvcp.QTVCP.LIB.AUDIO_PLAYER][WARNING]  audio alerts - Is
> python3-gst1.0 installed? (audio_player.py:37)
> .[QTvcp][INFO]  Logging to: /home/gene/qtvcp.log (logger.py:67)
> [QTvcp][INFO]  Base log level set to: 10 (logger.py:68)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  BASEPATH cam_align (qt_pstat.py:86)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for handler file in:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/cam_align_handler.py
> (qt_pstat.py:96)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for default handler file in:
> /usr/share/qtvcp/panels/cam_align/cam_align_handler.py (qt_pstat.py:102)
> [QTvcp.QTVCP.QT_PSTAT][INFO]  Using DEFAULT handler file path:
> /usr/share/qtvcp/panels/cam_align/cam_align_handler.py (qt_pstat.py:105)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for .ui in:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/cam_align.ui (qt_pstat.py:123)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for .ui in:
> /usr/share/qtvcp/panels/cam_align/cam_align.ui (qt_pstat.py:128)
> [QTvcp.QTVCP.QT_PSTAT][INFO]  Using DEFAULT ui file from:
> /usr/share/qtvcp/panels/cam_align/cam_align.ui (qt_pstat.py:130)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for .qss in:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/cam_align.qss (qt_pstat.py:160)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for .qss in:
> /usr/share/qtvcp/panels/cam_align/cam_align.qss (qt_pstat.py:165)
> [QTvcp.QTVCP.QT_PSTAT][INFO]  No qss file found. (qt_pstat.py:171)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for .qrc in:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/cam_align.qrc (qt_pstat.py:182)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for .qrc in:
> /usr/share/qtvcp/panels/cam_align/cam_align.qrc (qt_pstat.py:188)
> [QTvcp.QTVCP.QT_PSTAT][INFO]  No qrc file found. (qt_pstat.py:195)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for resources.py in:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/qtvcp/panels/resources.py
> (qt_pstat.py:205)
> [QTvcp.QTVCP.QT_PSTAT][INFO]  No resources.py file found, no QRC file to
> compile one from. (qt_pstat.py:216)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for translation file in:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/cam_align/languages/cam_align_en.qm
> (qt_pstat.py:223)
> [QTvcp.QTVCP.QT_PSTAT][DEBUG]  Checking for translation file in:
> /usr/share/qtvcp/screens/cam_align/languages/cam_align_en.qm
> (qt_pstat.py:228)
> [QTvcp.QTVCP.QT_PSTAT][INFO]  Using no translations, default system
> locale is: en (qt_pstat.py:233)
> [QTvcp][INFO]  Building A VCP Panel with: Python 3 (qtvcp:215)
> [QTvcp][INFO]  No handler file specified - using:
> /usr/share/qtvcp/panels/cam_align/cam_align_handler.py (qtvcp:218)
> [QTvcp.QTVCP.QT_MAKEGUI][INFO]  Qsettings file path:
> /home/gene/.config/QtVcp/cam_align.conf (qt_makegui.py:97)
> [QTvcp][DEBUG]  Loading the handler file. (qtvcp:276)
> [QTvcp.QTVCP.QT_MAKEGUI][DEBUG]  Adding import dir:
> /usr/share/qtvcp/panels/cam_align (qt_makegui.py:290)
> [QTvcp.QTVCP.QT_MAKEGUI][DEBUG]  Module 'cam_align_handler' imported OK
> (qt_makegui.py:301)
> [QTvcp.QTVCP.QT_MAKEGUI][DEBUG]  Module 'cam_align_handler' :
> 'get_handlers' function found. (qt_makegui.py:307)
> [QTvcp.QTVCP.QT_MAKEGUI][DEBUG]  Registering handlers in module
> cam_align_handler object <cam_align_handler.HandlerClass object at
> 0x7f262b1fd3c8> (qt_makegui.py:317)
> [QTvcp.QTVCP.QT_MAKEGUI][DEBUG]  Register callback 'call_user_command_'
> (qt_makegui.py:326)
> [QTvcp.QTVCP.QT_MAKEGUI][DEBUG]  Register callback 'initialized__'
> (qt_makegui.py:326)
> [QTvcp][DEBUG]  Adding the key events filter. (qtvcp:286)
> [QTvcp.QTVCP.QT_MAKEGUI][INFO]  No resource file to load: None
> (qt_makegui.py:192)
> .....[QTvcp.QTVCP.QT_MAKEPINS][DEBUG]  QTVCP: Parsing for HAL widgets.
> (qt_makepins.py:114)
> [QTvcp][DEBUG]  Calling the handler file's initialized__ function
> (qtvcp:309)
> [QTvcp.QTVCP.QT_MAKEGUI][INFO]  No Handler Override file at:
> /home/gene/linuxcnc/configs/GO704-5i25-7i76/.cam_alignrc (qt_makegui.py:358)
> [QTvcp][DEBUG]  Set HAL ready. (qtvcp:334)
> 
> [QTvcp][CRITICAL]  Forwarding events to AXIS is not well tested yet.
> (qtvcp:343)
> [QTvcp][DEBUG]  Show window. (qtvcp:391)
> [QTvcp.QTVCP.QT_MAKEPINS][INFO]  No preference file - cannot set
> preference geometry. (qt_makepins.py:160)
> [QTvcp][INFO]  Preference path: None (qtvcp:421)
> 
> What do I try to fix next?
> 
> thank you.
> 
> Cheers, Gene Heskett.
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author, 1940)
> If we desire respect for the law, we must first make the law respectable.
>  - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/>
> 
> 
> 
> _______________________________________________
> Emc-developers mailing list
> Emc-developers@lists.sourceforge.net
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> 
> _______________________________________________
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