On 01/10/2018 07:44 AM, Gabriel E. wrote:
A question about Qt/LXQT.
When starting LXQT with startlxqt LXQT crashes giving a core dump and
showing in the systemd logs the message
'Unable to find an X11 visual which matches EGL config'
The setup is connecting from a Windows 10 client to a system running
Arch Linux using (x)rdp.
On the Arch Linux system lxqt is started from ~/.xinitrc.
But a (x)rdp session is not created because of the above error.
Changing 'exec startlxqt' into 'exec xterm' in ~/.xinitrc does indeed
create a xrdp session but of course with just a xterm window.
Calling any Qt program in this terminal window leads to a core dump
and that message
'Unable to find an X11 visual which matches EGL config'
suggesting it's caused by Qt.
Last weekend 6 Januari I did a pacman -Syu and Qt was updated to
version 5.10.0.
Does anybody have an idea what change in Qt may be causing this error ?
Regards, Harm-Jan
Qt (and also GTK) use OpenGL to render and EGL is part of OpenGL.
Xterm renders itself via Xlib, which doesn't need OpenGL. I would
suggest installing Mesa onto the Linux system, because Mesa is what
X11 uses for OpenGL. But I am not sure, it my also be possible to pipe
OpenGL over RDP.
I have Mesa installed on my Arch Linux system.
An interesting point you mention about piping OpenGL over RDP.
See the thing is that on my Arch Linux system I have also VNC (tigervnc
1.7.1-1) running with LXQT as desktop environment and that goes well.
Also when I connect from my Windows Vista Desktop computer using RDP to
my Arch Linux system LXQT also runs fine.
With the Windows 10 laptop I experience this error.
Maybe ask the people at xrdp if they have an idea.
Regards, Harm-Jan
