I've just been installing daedalus on an old Dell notebook, and hit a
strange problem. (Don't think the hardware is relevant, but I could be
wrong.)

I left the desktop to default to xfce4 (I always use that anyway).
Install completed successfully. However, when I tried to open a
terminal via the icon on the launchpad, I got:

"Failed to execute default terminal emulator: input/output error"

The command executed was "exo-open --launch TerminalEmulator" (which I
think is standard for this in xfce4)

I checked applications -> settings -> default applications -> utilities
-> terminal emulator: set to "Debian X Terminal Emulator".

In /usr/share/xfce4/helpers/debian-x-terminal-emulator, X-XFCE-Binaries
is set to "x-terminal-emulator"

If I run /usr/bin/x-terminal-emulator, it bombs with the following:



Error: Compiling fragment shader:

0:1(10): error: GLSL ES 3.10 is not supported. Supported versions are:
1.00 ES, and 3.00 ES

terminate called after throwing an instance of 'std::system_error'
what(): Resource deadlock avoided



At the moment, that's as far as I've got with investigation/diagnosis.

Workaround was straightforward: just set the xfce4 terminal emulator to
"xfce4-terminal".

Weird thing is that I installed daedalus into a virtualbox VM about 2
months ago: the terminal icon pointed to x-terminal-emulator, and x-
terminal-emulator worked fine. I've just done an update/upgrade on it,
and it still works.

Sorry if this is a well-known problem. If not, I'm happy to raise it
as a bug if required.