CubicSDR start aborts with wxGL error message

[Rallyefahrer]

After starting CubicSDR, it aborts with following wxGL error message:
ASSERT INFO:
../src/unix/glx11.cpp(158): assert "fbc" failed in wxGLContext(): invalid GLXFBConfig for OpenGL

BACKTRACE:
[1] wxGLContext::wxGLContext(wxGLCanvas, wxGLContext const)
[2] wxEntry(int&, wchar_t**)
[3] __libc_start_main
[4] _start

OS: Debian Sid
CubicSDR deb-package: cubicsdr 0.2.4+dfsg-1

[cjcliffe]

@Rallyefahrer ahoy, where does the debian package you've used come from?
Also do you have your graphics card's native proprietary driver installed or are you using an open source version?

[Rallyefahrer]

Hey, I'm using the official debian package:
https://packages.debian.org/sid/cubicsdr
and the NVIDIA propr. driver:
https://packages.debian.org/sid/nvidia-legacy-340xx-kernel-dkms

[pe1chl]

I see the same issue on exactly the same OS/hardware combination (nvidia proprietary driver).
Is there any workaround without de-installing the nvidia driver?

[Rallyefahrer]

Maybe it has something to do with the big X-server-update to 1.20 in combination with nvidia propr. driver. The issue occured at at same time as far as I remember.

[pe1chl]

I will try on a different system with Debian buster/sid but with intel video, but it will be next year.
I intended to do so last week (at work) but I forgot.

[pe1chl]

Tried it, and the same issue arises. So it is not directly related to the Nvidia driver.
(this system has an Intel G45 mobile graphics adapter, driver is i915)

[Rallyefahrer]

Then it is maybe related to X-server 1.20, which conflicts somehow with CubicSDR and / or wxGL

[pe1chl]

Yes that could be. I only wanted to add this info because I have the same legacy-nvidia-340xx driver in use and I feared it might be related to that (or otherwise more people would be affected).
But probably not so, it would likely not work at all on Debian buster/sid. Unless we find someone for whom it works OK.

[Rallyefahrer]

Yeah, thats fine. But the problem started only after begin of July 18 - while before everything worked fine - this must be related to one of the updated packages in Debian Sid in this time. And one of the major updates in this time was the X-server from 1.19 to 1.20, but for sure other relevant packages like wxGL were also updated.

[Rallyefahrer]

Update: with Debian package cubicsdr 0.2.5+dfsg-3 on testing / Bullseye, the problem is gone. Issue could be closed from my point of view !