Thank you François. I was doubtful that your answer would help, but it did finally after some googling.
I had to run import matplotlib.font_manager matplotlib.font_manager._rebuild() At least on the 9.2 install that did help and once my user had those fonts installed in home (believe this is what happened) then it also fixed it on other machines with the same install, but not with the 9.1beta5. Must be a different problem there. I hope my solution also works for the students (maybe the fix can also be applied in the jupyter notebook from the start, which would be super nice). Jonathan François Bissey schrieb am Freitag, 13. November 2020 um 10:34:05 UTC+1: > The top of your crash log is interesting, especially with the context you > give it. > > [I 08:54:47.064 NotebookApp] 302 GET > /?token=9646f700a842467835ef92b578ebef632e86a326a85e828b (127.0.0.1) 1.53ms > [I 08:54:56.520 NotebookApp] Kernel started: > d273c9d9-80cb-45a6-a336-b3562f294b26, name: sagemath > ------------------------------------------------------------------------ > /srv/public/shared/DGI-sage/local/lib/python3.8/site-packages/cysignals/ > signals.cpython-38-x86_64-linux-gnu.so(+0x8bb8)[0x7faa181e6bb8] > /srv/public/shared/DGI-sage/local/lib/python3.8/site-packages/cysignals/ > signals.cpython-38-x86_64-linux-gnu.so(+0x8c58)[0x7faa181e6c58] > /srv/public/shared/DGI-sage/local/lib/python3.8/site-packages/cysignals/ > signals.cpython-38-x86_64-linux-gnu.so(+0xc89d)[0x7faa181ea89d] > /lib/x86_64-linux-gnu/libpthread.so.0(+0x12730)[0x7faa1cb3b730] > /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x10b)[0x7faa1c8107bb] > /lib/x86_64-linux-gnu/libc.so.6(abort+0x121)[0x7faa1c7fb535] > /lib/x86_64-linux-gnu/libgcc_s.so.1(+0x3358)[0x7faa1a2f8358] > /srv/public/shared/DGI-sage/local/lib/python3.8/site-packages/matplotlib/ > ft2font.cpython-38-x86_64-linux-gnu.so(+0x7a62)[0x7fa87edd6a62] > /srv/public/shared/DGI-sage/local/lib/python3.8/site-packages/matplotlib/ > ft2font.cpython-38-x86_64-linux-gnu.so > (_ZN7FT2FontC1ER13FT_Open_Args_l+0x22b)[0x7fa87edda23b] > /srv/public/shared/DGI-sage/local/lib/python3.8/site-packages/matplotlib/ > ft2font.cpython-38-x86_64-linux-gnu.so(+0xd35f)[0x7fa87eddc35f] > > > I’d say it is trying to open a font file to which it has no right. > > François > > > On 13/11/2020, at 9:54 PM, 'jonatha...@googlemail.com' via sage-devel < > sage-...@googlegroups.com> wrote: > > > > Dear all, > > > > the jupyter notebook crashes when trying to plot unbounded polyhedra, > e.g.: > > > > P = Polyhedron(ieqs=[(0,1,0)]) > > P.show() > > > > Bounded polyhedra seem to work fine, but also plotting of the face > lattice, a FiniteLatticePoset, fails (even for the cube). > > > > The crash appears to be deterministic, but only users other than the > owner. (I changed the permissions to 777 inbetween, this does not seem to > be the issue.) > > > > This happens on a 9.2. install, but also on a 9.1beta5 install on a > different machine (both debian buster). > > > > It does work for prebuilt binaries (9.2 and 9.1). > > > > Here are the system packages picked up: (* are those that also are > picked up for the 9.1beta5 with the same problem). > > > > boost-1_66_0: using system package; SPKG will not be installed > > boost_cropped-1.66.0.p0: using system package; SPKG will not be installed > > *bzip2-1.0.6-20150304.p0: using system package; SPKG will not be > installed > > *cmake-3.18.2: using system package; SPKG will not be installed > > *curl-7.62.0.p0: using system package; SPKG will not be installed > > *gcc-9.2.0: using system package; SPKG will not be installed > > gfan-0.6.2.p1: using system package; SPKG will not be installed > > *gfortran-9.2.0: using system package; SPKG will not be installed > > *git-2.11.0: using system package; SPKG will not be installed > > *gmp-6.1.2: using system package; SPKG will not be installed > > *iconv-1.15: using system package; SPKG will not be installed > > *mpfr-4.0.1.p0: using system package; SPKG will not be installed > > *mpir-3.0.0-644faf502c56f97d9accd301965fc57d6ec70868.p0:using system > package; SPKG will not be installed > > *ncurses-6.0.p0: using system package; SPKG will not be installed > > *ninja_build-1.8.2: using system package; SPKG will not be installed > > pandoc-none: using system package; SPKG will not be installed > > *patch-2.7.5: using system package; SPKG will not be installed > > *pcre-8.40.p2: using system package; SPKG will not be installed > > *perl_term_readline_gnu-1.35: using system package; SPKG will not be > installed > > *pkgconf-0.9.7.p2: using system package; SPKG will not be installed > > *readline-8.0: using system package; SPKG will not be installed > > *xz-5.2.2.p0: using system package; SPKG will not be installed > > *zlib-1.2.11.p0: using system package; SPKG will not be installed > > > > Does anyone know what might be the problem? > > > > In the section for installinging sagemath for multiusers there is no hint > > https://doc.sagemath.org/html/en/installation/source.html#id11 > > > > The full config.log and the crash report are attached. > > > > Thank you, > > > > Jonathan > > > > > > -- > > You received this message because you are subscribed to the Google > Groups "sage-devel" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to sage-devel+...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/48a9b546-c516-4969-b5f2-639964b975e4n%40googlegroups.com > . > > <crash.log><config.log> > > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. 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