Install / Run problem on linux: device not open, and shader not linked

[Andreas]

Dear all,

I am trying to run mnemosyne on debian, and I have installed the deb-package 2.6.1+ds-1.

Unfortunately, I get the following output when trying to start it up:

libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile
QIODevice::write (QProcess): device not open
QOpenGLFramebufferObject: Unsupported framebuffer format.
QOpenGLFramebufferObject: Unsupported framebuffer format.
QOpenGLFramebufferObject: Unsupported framebuffer format.
QOpenGLFramebufferObject: Unsupported framebuffer format.
QIODevice::write (QProcess): device not open
QOpenGLShaderProgram: could not create shader program
QOpenGLShader: could not create shader
Could not link shader program:
 ""
Received signal 11 SEGV_MAPERR 000000000000
#0 0x0000b0eb41fb <unknown>
#1 0x0000b0eb4802 <unknown>
#2 0x0000b0eb4ded <unknown>
#3 0x0000b7f50d10 ([vdso]+0xd0f)
#4 0x0000b7d02cc8 <unknown>
#5 0x0000b7d00ee5 <unknown>
#6 0x0000b7304e01 <unknown>
#7 0x0000b7305024 <unknown>
#8 0x0000b7304c7b <unknown>
#9 0x0000b6381cfe <unknown>
  gs: 00000033  fs: 00000000  es: 0000007b  ds: 0000007b
 edi: 0000000f esi: 00000310 ebp: bfa730f8 esp: bfa730a8
 ebx: b7d02cc8 edx: 0a3cc8ec ecx: 00000008 eax: 00000000
 trp: 0000000e err: 00000004  ip: b7d02cc8  cs: 00000073
 efl: 00210283 usp: bfa730a8  ss: 0000007b
[end of stack trace]
Calling _exit(1). Core file will not be generated.

According to my analysis, there are two potential problems:

a) the "device not open" might indicate that some (config) file is either not writeable, or the directory is not existing

b) the "shader" error I don't understand at all. It might be related to my graphics card driver, but I have not made any progress on that end.

Any idea would be highly appreciated!

Thanks, Andreas

[Peter Bienstman]

Hi,

 

The ‘device not open’ should be harmless, I also so this under Windows.

 

However, for the graphics card problem, I’m afraid you’ll have to contact the Debian packager, as I’m not involved in that aspect.

 

Cheers,

 

Peter

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[Andreas]

Ok, thanks! I think I will try the tarball next.
Best, Andreas

[Andreas]

Dear all,

I contacted Robert; however, I also tried to install from the tarball:

I got a bit further - the default python on my system was python2, which I changed now to python3.

However, the version compiled from the tarball generated the exact same error messages. :-(

(I haven't deinstalled the package, but normally they shouldn't interfere)

Best regards, Andreas

[Oisín Mac Fhearaí]

On Monday, September 24, 2018 at 7:51:44 PM UTC+1, Andreas wrote:

Dear all,

I contacted Robert; however, I also tried to install from the tarball:

I got a bit further - the default python on my system was python2, which I changed now to python3.

However, the version compiled from the tarball generated the exact same error messages. :-(

(I haven't deinstalled the package, but normally they shouldn't interfere)

Best regards, Andreas

It sounds like this issue may have existed in Ubuntu some time ago, caused by a mismatch between an installed NVidia graphics driver conflicting with the libGL.so build:

https://forum.qt.io/topic/81328/ubuntu-qopenglshaderprogram-shader-program-is-not-linked/2

The workaround there was to add these lines during program initialisation:

if sys.platform.startswith('linux'):
  from OpenGL import GL

[Peter Bienstman]

Interesting, thanks for tracking this down!

 

Andreas, if this turns out to work for you, I could add this to Mnemosyne’s code, provided there are no side-effects/issues for other linux distributions.

 

The file you need to add these lines to is ‘mnemosyne’, just add them at the top.

 

Cheers,

 

Peter

 

From: mnemosyne-...@googlegroups.com <mnemosyne-...@googlegroups.com> On Behalf Of Oisín Mac Fhearaí

Sent: 24 September 2018 23:07
To: mnemosyne-proj-users <mnemosyne-...@googlegroups.com>

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[Andreas Balser]

If I am not totally mistaken, this import statement is already present, including output of a warning if it fails.

To make sure, I also had pasted it in one more time near the top, but it did whelp. Unless there is a specific place where it needs to go? 

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[Peter Bienstman]

Oops, forgot about this.

 

How about removing that statement?

 

Cheers,

 

Peter

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