Love updates: Ubuntu, OpenGL, IOT instruction
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I  have updated  my wannabe  work machine  (the Lenovo  x61s which  now
serves  as my  only  Linux box  at  work because  the  work machine  is
Windows-only). It runs Ubuntu LTS for ages. I upgraded it to the latest
LTS with naive hopes that it solves some of its minor issues.

It didn't. Moreover, there are some new (albeit minor) issues, like the
notification area with the next "No indicators".

But a  more important issue  have arose. I  have a FEA  (Finite Element
Analysis) code  which uses the OpenGL  1.x and the Gtk+  2.x. It worked
well until  the update.  Now it  starts abut at  some moment  it always
crashes with the "IOT instruction (core dumped)" error.

The  workaround  is  to  disable  the  OpenGL  accelereation  for  this
particular application. It is stupid  (as this thing benefits  from the
acceleration so much) but it at least no longer crashes.

So the command is : IBGL_ALWAYS_SOFTWARE=1 /path/to/gfem

Well, it is still good that a 14 year old machine is at least partially
supported  by current  operating systems.  Even better  is that  my OKI
printer is still  supported here, too (it was donated  to me because it
does not work under the Windows 11).