Re: SV: octave doesn't work any longer with qt graphics toolkit

[Jon Turney <jon.turney@dronecode.org.uk>]

On 24/01/2023 11:50, Marco Atzeri via Cygwin wrote:
> On 17.01.2023 12:29, Wyser Klaus wrote:
>> Hej Marco---
>>
>> Thanks for your reply. I tried to send the cygcheck output to the 
>> Cygwin mailing list last week, but the file was too big (2M) and the 
>> post was rejected. I therefore put the file on a temporary platform 
>> for file exchange:
>> http://exporter.nsc.liu.se/2ce844aaa0014c9f9cf889f2b062fdc7/cygcheck.out
>> from where you should be able to fetch it.
>>
>> I tried to repeat exactly the example that you suggested, no success 
>> unfortunately. I attach the XWin logfile, maybe it helps you to spot 
>> anything.
>>
[..]
> 
> Hi Klaus,
> 
> my guess is that there is an issue with the drivers
> 
> 
> [183955.593] (EE) AIGLX: No native OpenGL in modes with a root window
> [183955.843] (EE) AIGLX error: dlopen of /usr/lib/dri/swrast_dri.so 
> failed (No such process)
> [183955.843] (EE) AIGLX error: unable to load driver swrast
> [183955.843] (EE) GLX: could not load software renderer
> [183955.843] (II) GLX: no usable GL providers found for screen 0

Aha, I suspect the problem here is the same as [1].

You have no OpenGL, because the software rasterizer requires LLVM, and 
is failing to load due to that bug.

Please try updating to the latest Cygwin.

[1] https://cygwin.com/pipermail/cygwin/2023-January/252805.html