LinuxCNC Install using MX Linux 19.4 - Geared Toward New Users - Discussion

Hi Snowgoer,

I think the problem is something to do with Qtvcp.
In both MX and Debian installs everything goes OK until it comes to that.

As per Rods suggestion I've just installed Debian Bookworm and am also having issue with it. Axis sims seem to be fine but when I start a Qtplasmac sim, there are screen display issues and after closing Qtplasmac an error box is displayed. I've attached the "linuxcnc.report" file.
 

The main window in Qtplasmac where the part to be cut is shown, I can see the main Debian desktop. If I go to a different window within Qtplasmac, then go back to the main window, the part window shows what was showing in the previous window. Hope that made sense.

As can be seen from that report, the issue seems to start here:
Starting DISPLAY program: qtvcp
Shutting down and cleaning up LinuxCNC...

And further down in the report:
Debug file information:
Can not find -sec DISPLAY -var INTRO_GRAPHIC -num 1 
Can not find -sec DISPLAY -var INTRO_TIME -num 1 

And yes you are right, I do like MX better, it seems easier to get around. I'm only trying the Debian route out of desperation so I can get my plasma table up and running again

Beefy, can you try typing
/usr/lib/python3/dist-packages/qtvcp/designer/install_script
as mentioned in the qtplasmac docs?
linuxcnc.org/docs/2.9/html/plasma/qtplasmac.html#qt-dependency

Hey, I never said I like Debian, I just use it for linuxcnc!

Are you running Wayland?
If so the package in Bookworm is older than the fixes. As a workaround you can open a terminal and enter export QT_QPA_PLATFORM="xcb" and when that completes run Linuxcnc from the same terminal.

phillc54 wrote:

Are you running Wayland?
If so the package in Bookworm is older than the fixes. As a workaround you can open a terminal and enter export QT_QPA_PLATFORM="xcb" and when that completes run Linuxcnc from the same terminal.

If you followed my instructions you should end up with XFCE which isn't on wayland. If you are uncertain, go back to the logon screen, click in the password field and a gear icon appears at bottom right. Select something like Gnome on xorg or xfce and login. This is discussed in my instructions.

Rod, I entered the command you gave:
/usr/lib/python3/dist-packages/qtvcp/designer/install_script

and it appeared to have completed that process OK.
However, same problem with Qtplasmac.

So I then checked the gear icon at login and Gnome was selected.
I changed it to your suggested "Gnome on xorg" and then Qtplasmac sim started without the aforementioned screen issues, but when I closed Qtplasmac it give an error box on close again.

So back to that gear icon and changed from "Gnome on xorg" to "Xcfe session".
Again Qtplasmac sim started and appeared OK, with none of the earlier mentioned display issues, but once again when I close Qtplasmac, still getting an error box.
This is the error report: 


No idea if the error message on Qtplasmac close is significant or not.

EDIT !!!!!
Regarding the installation and GUI selection. I remember a graphical window where I think Debian and Gnome where already selected, plus something like "standard accessories".
I've just started re-reading your instructions and realised it said DE-SELECT gnome and Debian. I missed that bit and left them selected, but also selected the Xcfe box.
So a thousand apologies for that.

Don't worry about the shutdown error it has been fixed since the Bookworm version ofLinuxCNC.