No spectrum under Ubuntu 22.04.1 LTS

[dwarning]

I installed latest .deb package on my old HP ProBook 6440b. I can plugin my SDR stick and my Airspy too and see that reception is working and can hear FM station very well. Problem is that I can't see a spectrum in the different plugins, e.g. Broadcast FM Demodulator. The small window is entire black. For me it looks like a graphic problem. Made the same check under Win 10 everything is fine. How can I check if my graphic capabilities fulfil the requirements? Is there something to configure?

[srcejon]

What version of OpenGL is reported in the status bar at the bottom right of the window? Needs to be at least OpenGL 2.1. Perhaps post a screenshot.

You might also want to look in the log file (Preferences > Logging) to see if there are any relevant messages.

From: dwarning @.> Sent: 16 January 2023 11:27 To: f4exb/sdrangel @.> Cc: Subscribed @.***> Subject: [f4exb/sdrangel] No spectrum under Ubuntu 22.04.1 LTS (Issue #1567)

I installed latest .deb package on my old HP ProBook 6440b. I can plugin my SDR stick and my Airspy too and see that reception is working and can hear FM station very well. Problem is that I can't see a spectrum in the different plugins, e.g. Broadcast FM Demodulator. The small window is entire black. For me it looks like a graphic problem. Made the same check under Win 10 everything is fine. How can I check if my graphic capabilities fulfil the requirements? Is there something to configure?

— Reply to this email directly, view it on GitHub https://github.com/f4exb/sdrangel/issues/1567 , or unsubscribe https://github.com/notifications/unsubscribe-auth/ANU3J6QYRX7NRCSHWBQIRATWSUWBVANCNFSM6AAAAAAT4UCXQQ . You are receiving this because you are subscribed to this thread. https://github.com/notifications/beacon/ANU3J6USKNIHZJW37G4BX5DWSUWBVA5CNFSM6AAAAAAT4UCXQSWGG33NNVSW45C7OR4XAZNFJFZXG5LFVJRW63LNMVXHIX3JMTHFW6VO5M.gif Message ID: @. @.> >

[dwarning]

Thanks for the quick response.

This is my openGL version:

client glx vendor string: Mesa Project and SGI Device: Mesa Intel(R) HD Graphics (ILK) (0x46) OpenGL renderer string: Mesa Intel(R) HD Graphics (ILK) OpenGL core profile version string: 4.5 (Core Profile) Mesa 22.0.5 OpenGL version string: 4.5 (Compatibility Profile) Mesa 22.0.5 OpenGL ES profile version string: OpenGL ES 2.0 Mesa 22.0.5 And same OpenGL Version 4.5 is shown in the bottom message.

In the large logfile are error messages regarding GLSL library version 3.3:

`2023-01-16 12:50:46.518 (D) GLSpectrumView::initializeGL: context: major: 4 minor: 5 ES: no 2023-01-16 12:50:46.531 (W) QOpenGLShader::compile(Vertex): 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.40, and 1.00 ES

2023-01-16 12:50:46.531 (W) Problematic Vertex shader source code

version 330

define lowp

define mediump

define highp

line 1

uniform highp mat4 uMatrix; in highp vec4 vertex; void main() { gl_Position = uMatrix * vertex; }

---

2023-01-16 12:50:46.532 (D) GLShaderSimple::initializeGL: error in vertex shader: "0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.40, and 1.00 ES\n" 2023-01-16 12:50:46.532 (W) QOpenGLShader::compile(Fragment): 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.40, and 1.00 ES

2023-01-16 12:50:46.532 (W) Problematic Fragment shader source code

version 330

ifdef GL_KHR_blend_equation_advanced

extension GL_ARB_fragment_coord_conventions : enable

extension GL_KHR_blend_equation_advanced : enable

endif

define lowp

define mediump

define highp

line 1

out vec4 fragColor; uniform mediump vec4 uColour; void main() { fragColor = uColour; } ` This sounds stupid, because of the requested versions 1.00 ... 1.40.

[dwarning]

This helps - but can't overlook the implications:

MESA_GL_VERSION_OVERRIDE=3.3 MESA_GLSL_VERSION_OVERRIDE=330 sdrangel

[srcejon]

The SDRangel code is checking the OpenGL version, and using that to decide what GLSL shader code to use. There are different shaders for >= 3.3 and < 3.3.

However, it seems although you have OpenGL 4.5, your card doesn’t support GLSL 3.3 shaders. So, we probably need to check the GLSL version rather than the OpenGL version.

To get the older shader code, I’d guess you should try MESA_GL_VERSION_OVERRIDE=2.1 sdrangel

Cheers,

Jon

From: dwarning @.> Sent: 16 January 2023 13:21 To: f4exb/sdrangel @.> Cc: srcejon @.>; Comment @.> Subject: Re: [f4exb/sdrangel] No spectrum under Ubuntu 22.04.1 LTS (Issue #1567)

This helps - but can't overlook the implications:

MESA_GL_VERSION_OVERRIDE=3.3 MESA_GLSL_VERSION_OVERRIDE=330 sdrangel

— Reply to this email directly, view it on GitHub https://github.com/f4exb/sdrangel/issues/1567#issuecomment-1384053102 , or unsubscribe https://github.com/notifications/unsubscribe-auth/ANU3J6T3GTOVWA6AG2TFMD3WSVDKZANCNFSM6AAAAAAT4UCXQQ . You are receiving this because you commented. https://github.com/notifications/beacon/ANU3J6RGYMLHHLMNQDTHZXTWSVDKZA5CNFSM6AAAAAAT4UCXQSWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTSSP34W4.gif Message ID: @. @.> >

[dwarning]

Perhaps a misunderstanding: Initial OpenGL 4.5 didn't work. My overwrite version to 3.3 works! Your suggestion overwrite to 2.1 bring a total wrong application on the desktop - not usable. log on terminal 2023-01-16 14:49:51.263 (W) QOpenGLShader::link: error: linking with uncompiled/unspecialized shadererror: linking with uncompiled/unspecialized shader

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