[Octave-bug-tracker] [bug #51442] graphics_toolkit qt does not work with Qt 5 in Xwayland and Intel mesa driver

[Dmitri A. Sergatskov]

Follow-up Comment #21, bug #51442 (project octave):

I can reproduce the problem on

cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 60
model name      : Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
stepping        : 3
microcode       : 0x22

glxinfo -B
name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel Open Source Technology Center (0x8086)
    Device: Mesa DRI Intel(R) Haswell Desktop  (0x412)
    Version: 17.1.4
    Accelerated: yes
    Video memory: 1536MB
    Unified memory: yes
    Preferred profile: core (0x1)
    Max core profile version: 4.5
    Max compat profile version: 3.0
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.1
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop 
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.1.4
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 3.0 Mesa 17.1.4
OpenGL shading language version string: 1.30
OpenGL context flags: (none)

OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.1.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10



Setting LIBGL_ALWAYS_SOFTWARE=1
"solves" the problem, though there is a black screen flash
that lasts about a sec before the actual plot appears.

Dmitri.
-- 



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