Thank you!
Scilab starts normally on sid with linux-image 4.11.6-1.
dpkg -S /boot/vmlinuz-4.11.0-1-686-pae
linux-image-4.11.0-1-686-pae: /boot/vmlinuz-4.11.0-1-686-pae
$ apt-cache policy linux-image-4.11.0-1-686-pae
linux-image-4.11.0-1-686-pae:
Installed: 4.11.6-1
Candidate: 4.11.6-1
Version table:
*** 4.11.6-1 500
500
http://ftp.debian.org/debian sid/main i386 Packages
100 /var/lib/dpkg/status
I hope you backport this fix to all supported Debian versions.